642
FNUS56 KPDT 262123
FWFPDT
FIRE WEATHER PLANNING FORECAST FOR NE OREGON AND SE WASHINGTON
NATIONAL WEATHER SERVICE PENDLETON OR
223 PM PDT TUE MAY 26 2026
DISCUSSION
A STALLED SYSTEM TO OUR SOUTH WILL CONTINUE TO BRING
AFTERNOON SHOWER AND ISOLATED THUNDERSTORM CHANCES ACROSS THE
REGION THROUGH THE WEEK. CHANCES PEAK ON THURSDAY AS THE MAIN
CONCERNS WILL INCLUDE FREQUENT LIGHTNING, SMALL HAIL, AND ELEVATED
OUTFLOW WINDS. MINIMUM HUMIDITIES TREND DOWNWARD THROUGH THURSDAY
AS PORTIONS OF THE COLUMBIA BASIN AND CENTRAL OREGON WILL DROP
BETWEEN 20-25%. HOWEVER, OVERNIGHT HUMIDITY RECOVERIES WILL STAY
MODERATE TO GOOD (60-80 PERCENT).
***THUNDERSTORMS IMPLY STRONG GUSTY WINDS ***
***WINDS ARE 20 FOOT 10 MINUTE AVERAGES ***
***CWR: CHANCE OF WETTING RAIN 0.10 OR GREATER ***
***VENTILATION INDEX IS DERIVED FROM TRANSPORT WIND
MULTIPLIED BY THE MIXING HEIGHT IN 100'S OF FT.
CATEGORIES ARE A GENERALIZED INDICATOR AND USERS
ARE ENCOURAGE TO DEVELOP CRITERIA THAT ARE
SUITABLE AND REPRESENTATIVE OF DISPERSION
CONDITIONS IN THEIR LOCAL AREA OF INTEREST.
CATEGORIES: LOW (< 200), MODERATE (200-500),
HIGH (500-700), AND VERY HIGH (> 700).
-NOTE: MAX TRANSPORT WINDS MAY NOT OCCUR
AT THE SAME TIME AS MAX MIXING HEIGHT. ***
WAZ695-271200-
EAST WASHINGTON SOUTH CENTRAL CASCADE MOUNTAINS-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....38-46.
* MAX HUMIDITY........73-88 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT EXCELLENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 4 TO 10 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (128-218) DECREASING TO LOW
(38-62) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....72-80...EXCEPT 64-72 RIDGES.
* MIN HUMIDITY........39-54 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (80-136) INCREASING TO MODERATE (231-391)
IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....47-55.
* MAX HUMIDITY........62-77 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (108-170) DECREASING TO LOW (28-40) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....77-86...EXCEPT 68-77 RIDGES.
* MIN HUMIDITY........37-52 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 1 TO 6 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH SHIFTING TO THE SOUTHEAST
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (28-58) INCREASING TO MODERATE (218-424)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MUCH COOLER. MOSTLY CLOUDY WITH SHOWERS LIKELY AND A
SLIGHT CHANCE OF THUNDERSTORMS. LOWS 42 TO 52. HIGHS 49 TO 64.
NORTHWEST WINDS 7 TO 13 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 34 TO 41. HIGHS 48 TO 60.
NORTHWEST WINDS 10 TO 16 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 32 TO 39. HIGHS 52 TO 64. NORTHWEST
WINDS 8 TO 14 MPH.
MONDAY
WARMER. MOSTLY CLEAR. LOWS 35 TO 42. HIGHS 63 TO 75.
NORTHEAST WINDS 3 TO 8 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 67 TO 79. EAST
WINDS 1 TO 6 MPH.
WAZ690-271200-
KITTITAS VALLEY-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....46-51.
* MAX HUMIDITY........63-78 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 6 TO 12 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 7 TO 13 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.
* VENTILATION INDEX...MODERATE (213-277) DECREASING TO LOW (45-69)
AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....78-85...EXCEPT 70-78 RIDGES.
* MIN HUMIDITY........34-43 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (111-165) INCREASING TO MODERATE TO HIGH
(350-524) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....54-59.
* MAX HUMIDITY........57-72 PERCENT.
* HUMIDITY RECOVERY...MODERATE.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (167-215) DECREASING TO LOW
(32-44) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY. A SLIGHT CHANCE OF SHOWERS IN
THE AFTERNOON.
* MAX TEMPERATURE.....84-91...EXCEPT 75-84 RIDGES.
* MIN HUMIDITY........32-40 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 1 TO 5 MPH IN THE MORNING
BECOMING UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (43-69) INCREASING TO MODERATE (282-392)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
NOT AS WARM. SHOWERS LIKELY AND A SLIGHT CHANCE OF
THUNDERSTORMS. MOSTLY CLOUDY. LOWS 52 TO 58. HIGHS 66 TO 76.
NORTHWEST WINDS 13 TO 19 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 42 TO 47. HIGHS 62 TO 71.
NORTHWEST WINDS 15 TO 21 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 40 TO 45. HIGHS 65 TO 73. NORTHWEST
WINDS 12 TO 18 MPH.
MONDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 72 TO 79. NORTHEAST
WINDS 4 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 77 TO 84. NORTHEAST
WINDS 2 TO 7 MPH.
WAZ694-271200-
YAKAMA ALPINE DISTRICT-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MIN TEMPERATURE.....40-47.
* MAX HUMIDITY........70-85 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 1 TO 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (167-235) DECREASING TO LOW
(27-45) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....76-83...EXCEPT 66-77 RIDGES.
* MIN HUMIDITY........35-47 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 1 TO 6 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (73-155) INCREASING TO MODERATE TO HIGH
(348-508) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....48-56.
* MAX HUMIDITY........65-80 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (99-167) DECREASING TO LOW (25-33) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING MOSTLY CLOUDY. A
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....80-87...EXCEPT 71-82 RIDGES.
* MIN HUMIDITY........33-48 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING EAST 1 TO 6
MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (28-60) INCREASING TO MODERATE (282-452)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
COOLER. MOSTLY CLOUDY WITH SHOWERS AND A SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 45 TO 52. HIGHS 55 TO 69. WEST WINDS 6 TO
12 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 35 TO 41. HIGHS 53 TO 66. WEST
WINDS 7 TO 13 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 33 TO 40. HIGHS 57 TO 69. WEST WINDS
5 TO 11 MPH.
MONDAY
MOSTLY CLEAR. LOWS 37 TO 44. HIGHS 65 TO 78. EAST WINDS
2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 45 TO 51. HIGHS 69 TO 82.
NORTHEAST WINDS 1 TO 5 MPH.
ORZ691-WAZ691-271200-
LOWER COLUMBIA BASIN OF OREGON-LOWER COLUMBIA BASIN OF WASHINGTON-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........72-87 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (35-221) DECREASING TO LOW
(25-46) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....76-86...EXCEPT 74-80 RIDGES.
* MIN HUMIDITY........34-46 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (30-92) INCREASING TO MODERATE TO HIGH
(281-527) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....51-56.
* MAX HUMIDITY........73-88 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...EAST WINDS 2 TO 7 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH SHIFTING TO THE WEST
2 TO 5 MPH AFTER MIDNIGHT.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....EAST AROUND 5 MPH SHIFTING TO THE NORTHWEST
AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (59-175) DECREASING TO LOW (25-29) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....82-92...EXCEPT 79-86 RIDGES.
* MIN HUMIDITY........32-44 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTH 2 TO
5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 2 TO 6 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE
NORTHEAST IN THE AFTERNOON.
* VENTILATION INDEX...LOW (26-50) INCREASING TO MODERATE (287-425)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
NOT AS WARM. A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. MOSTLY CLOUDY. LOWS 50 TO 55. HIGHS 65 TO 79.
SOUTHWEST WINDS 11 TO 17 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 42 TO 47. HIGHS 63 TO 73. WEST
WINDS 12 TO 18 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 40 TO 45. HIGHS 66 TO 75. WEST WINDS
8 TO 14 MPH.
MONDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 75 TO 81. NORTHEAST
WINDS 3 TO 8 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS 80 TO 87. NORTHEAST
WINDS 2 TO 7 MPH.
ORZ692-WAZ692-271200-
NORTHERN BLUE MOUNTAINS OF OREGON-BLUE MOUNTAINS OF WASHINGTON-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING, THEN A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....41-47.
* MAX HUMIDITY........78-93 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS UP TO 5 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (87-141) DECREASING TO LOW (28-50) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....69-77...EXCEPT 64-69 RIDGES.
* MIN HUMIDITY........48-63 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTH 2 TO
5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (46-100) INCREASING TO MODERATE (207-275)
IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....47-55.
* MAX HUMIDITY........78-93 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 1 TO 5 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....EAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (56-80) DECREASING TO LOW (25-31) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....76-84...EXCEPT 71-76 RIDGES.
* MIN HUMIDITY........46-59 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTH 2 TO 5
MPH IN THE AFTERNOON.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (29-53) INCREASING TO MODERATE (213-335)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
COOLER. MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE
OF THUNDERSTORMS. LOWS 47 TO 55. HIGHS 60 TO 70. SOUTHWEST WINDS
4 TO 9 MPH.
SATURDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 39 TO
46. HIGHS 53 TO 63. WEST WINDS 5 TO 11 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 36 TO 43. HIGHS 56 TO 66. WEST
WINDS 1 TO 6 MPH.
MONDAY
MOSTLY CLEAR. LOWS 38 TO 45. HIGHS 65 TO 75. NORTH
WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 43 TO 50. HIGHS 71 TO 81. NORTH
WINDS 1 TO 6 MPH.
ORZ693-WAZ693-271200-
CANYON GRASSLANDS OF WALLOWA COUNTY-
SOUTHEAST WASHINGTON GRANDE RONDE VALLEY-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....41-48.
* MAX HUMIDITY........75-90 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 10 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 8 TO 14 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (113-221) DECREASING TO LOW
(29-81) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....69-78...EXCEPT 63-70 RIDGES.
* MIN HUMIDITY........45-53 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (56-88) INCREASING TO MODERATE (227-307)
IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....45-54.
* MAX HUMIDITY........75-90 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (46-74) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....77-85...EXCEPT 71-77 RIDGES.
* MIN HUMIDITY........37-46 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTH 2 TO 6
MPH IN THE AFTERNOON.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....30 PERCENT (CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....EAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-40) INCREASING TO LOW TO MODERATE
(131-269) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
NOT AS WARM. A CHANCE OF THUNDERSTORMS AND A SLIGHT
CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 45 TO 55. HIGHS 66 TO 75.
WEST WINDS 1 TO 6 MPH.
SATURDAY
COOLER. MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS. LOWS 39 TO 48. HIGHS 56 TO 64.
WEST WINDS 3 TO 8 MPH.
SUNDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 36 TO
44. HIGHS 60 TO 68. WEST WINDS 1 TO 6 MPH.
MONDAY
MOSTLY CLEAR. LOWS 37 TO 45. HIGHS 68 TO 76. NORTH
WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 41 TO 49. HIGHS 74 TO 82.
NORTHEAST WINDS 1 TO 6 MPH.
ORZ701-271200-
EASTERN COLUMBIA RIVER GORGE OF OREGON-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS.
* MIN TEMPERATURE.....44-50.
* MAX HUMIDITY........74-88 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 4 TO 9 MPH...EXCEPT WEST 4
TO 9 MPH IN THE EASTERN COLUMBIA RIVER GORGE.
* RIDGES/UPR SLOPES....WEST WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE (228-304) DECREASING TO LOW (34-50)
AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING SUNNY.
* MAX TEMPERATURE.....78-83.
* MIN HUMIDITY........36-42 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH...EXCEPT NORTHWEST 2
TO 7 MPH IN THE EASTERN COLUMBIA RIVER GORGE.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (54-88) INCREASING TO MODERATE TO HIGH
(237-585) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....50-56.
* MAX HUMIDITY........69-82 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 2 TO 6 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH. IN THE EASTERN
COLUMBIA RIVER GORGE, WEST WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (110-180) DECREASING TO LOW (26-34) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....81-86.
* MIN HUMIDITY........35-46 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WINDS NORTHWEST 2 TO 5 MPH IN THE AFTERNOON.
UPSLOPE LESS THAN 5 MPH. IN THE EASTERN COLUMBIA RIVER GORGE,
WINDS WEST 2 TO 7 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHWEST 2
TO 5 MPH IN THE AFTERNOON.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (30-52) INCREASING TO MODERATE (269-471)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
COOLER. MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE
OF THUNDERSTORMS. LOWS 47 TO 53. HIGHS 61 TO 67. WEST WINDS 11 TO
17 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 39 TO 44. HIGHS 61 TO 66. WEST
WINDS 11 TO 17 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 37 TO 43. HIGHS 66 TO 71. WEST WINDS
10 TO 16 MPH.
MONDAY
WARMER. MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 76 TO 82.
EAST WINDS 3 TO 8 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 81 TO 86. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ702-271200-
EAST SLOPES OF THE MT. HOOD NATIONAL FOREST-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS.
* MIN TEMPERATURE.....38-46.
* MAX HUMIDITY........74-89 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 1 TO 5 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE (204-264) DECREASING TO LOW (41-51)
AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING SUNNY.
* MAX TEMPERATURE.....75-81...EXCEPT 69-76 RIDGES.
* MIN HUMIDITY........36-50 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS UP TO 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHEAST 1
TO 5 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW (77-135) INCREASING TO MODERATE TO HIGH
(430-658) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....46-55.
* MAX HUMIDITY........66-81 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (104-200) DECREASING TO LOW
(27-33) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....79-85...EXCEPT 72-80 RIDGES.
* MIN HUMIDITY........37-52 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (34-52) INCREASING TO MODERATE TO HIGH
(357-519) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MUCH COOLER. MOSTLY CLOUDY WITH SHOWERS LIKELY AND A
CHANCE OF THUNDERSTORMS. LOWS 41 TO 50. HIGHS 49 TO 63. WEST
WINDS 7 TO 13 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 32 TO 40. HIGHS 49 TO 62. WEST
WINDS 7 TO 13 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 31 TO 38. HIGHS 55 TO 67. WEST WINDS
6 TO 12 MPH.
MONDAY
WARMER. MOSTLY CLEAR. LOWS 36 TO 42. HIGHS 68 TO 77.
NORTHEAST WINDS 1 TO 6 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 46 TO 52. HIGHS 72 TO 82. EAST
WINDS UP TO 5 MPH.
ORZ695-271200-
EAGLE CAP WILDERNESS-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS AFTER MIDNIGHT.
* MIN TEMPERATURE.....42-48...EXCEPT 37-45 RIDGES.
* MAX HUMIDITY........80-95 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 9 TO 15 MPH WITH GUSTS UP TO 25
MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 9 TO 15 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 15 TO 20 MPH.
* VENTILATION INDEX...LOW TO MODERATE (145-287) DECREASING TO LOW
(50-132) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....68-79...EXCEPT 59-69 RIDGES.
* MIN HUMIDITY........43-57 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 9 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (70-138) INCREASING TO MODERATE (238-392)
IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....44-52.
* MAX HUMIDITY........72-87 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT EXCELLENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 1 TO 6 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 3 TO 8 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (62-90) DECREASING TO LOW (27-41) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....73-83...EXCEPT 63-73 RIDGES.
* MIN HUMIDITY........32-47 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHWEST 2
TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH SHIFTING TO THE
SOUTHEAST 3 TO 8 MPH IN THE AFTERNOON.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....30 PERCENT (CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH SHIFTING TO THE
SOUTHEAST IN THE AFTERNOON.
* VENTILATION INDEX...LOW (41-67) INCREASING TO MODERATE TO HIGH
(207-593) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
A CHANCE OF SHOWERS AND THUNDERSTORMS. MOSTLY CLOUDY.
LOWS 43 TO 51. HIGHS 57 TO 72. WEST WINDS 2 TO 7 MPH.
SATURDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 37 TO 45. HIGHS 49 TO 63. NORTHWEST
WINDS 5 TO 11 MPH.
SUNDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS. LOWS 32 TO 40. HIGHS 52 TO 66. NORTHWEST WINDS 3 TO
8 MPH.
MONDAY
MOSTLY CLEAR. LOWS 34 TO 42. HIGHS 60 TO 74. WEST WINDS
2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 40 TO 47. HIGHS 65 TO 80. WEST
WINDS 1 TO 6 MPH.
ORZ694-271200-
GRANDE RONDE VALLEY OF OREGON-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....41-46.
* MAX HUMIDITY........87-98 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 13 TO 19 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 16 TO 25 MPH DECREASING TO
13 TO 19 MPH AFTER MIDNIGHT.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 20 TO 25 MPH.
* VENTILATION INDEX...MODERATE (216-346) DECREASING TO LOW (72-124)
AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....76-81.
* MIN HUMIDITY........41-47 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 6 TO 12 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 6 TO 12 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......4000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 15 MPH.
* VENTILATION INDEX...LOW (117-183) INCREASING TO MODERATE
(332-406) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........89-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 2 TO 7 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 3 TO 7 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (56-76) DECREASING TO LOW (25-33) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....80-86.
* MIN HUMIDITY........34-43 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHEAST 2
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 2 TO 5 MPH SHIFTING TO THE
SOUTHEAST 3 TO 6 MPH IN THE AFTERNOON.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....30 PERCENT (CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH SHIFTING TO THE SOUTHEAST
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (49-71) INCREASING TO LOW TO MODERATE
(46-222) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
NOT AS WARM. A CHANCE OF SHOWERS AND THUNDERSTORMS.
MOSTLY CLOUDY. LOWS 45 TO 50. HIGHS 70 TO 75. WEST WINDS 4 TO
10 MPH.
SATURDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 39 TO
44. HIGHS 62 TO 67. NORTHWEST WINDS 8 TO 14 MPH.
SUNDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
35 TO 40. HIGHS 65 TO 70. NORTHWEST WINDS 6 TO 12 MPH.
MONDAY
MOSTLY CLEAR. LOWS 37 TO 42. HIGHS 73 TO 78. NORTH
WINDS 2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 42 TO 47. HIGHS 79 TO 84. NORTH
WINDS UP TO 5 MPH.
ORZ699-271200-
WESTERN FORESTED BLUE MOUNTAINS-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY IN THE EVENING,
THEN A CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....37-42.
* MAX HUMIDITY........85-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 4 TO 9 MPH.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (162-224) DECREASING TO LOW
(69-105) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....68-76...EXCEPT 63-71 RIDGES.
* MIN HUMIDITY........40-55 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (81-133) INCREASING TO MODERATE TO HIGH
(294-598) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....43-49.
* MAX HUMIDITY........81-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 1 TO 6 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 6 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (82-138) DECREASING TO LOW (25-32) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....74-80...EXCEPT 68-74 RIDGES.
* MIN HUMIDITY........36-51 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHEAST 2
TO 6 MPH IN THE AFTERNOON.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....30 PERCENT (CHANCE).
* MIXING HEIGHT.......8500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (46-70) INCREASING TO MODERATE TO VERY
HIGH (308-702) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
COOLER. MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 43 TO 49. HIGHS 59 TO 67. WEST WINDS 1 TO
6 MPH.
SATURDAY
A SLIGHT CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 37 TO
42. HIGHS 54 TO 63. NORTHWEST WINDS 4 TO 9 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 33 TO 38. HIGHS 57 TO 66. NORTHWEST
WINDS 2 TO 7 MPH.
MONDAY
MOSTLY CLEAR. LOWS 35 TO 40. HIGHS 66 TO 74. NORTH
WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 41 TO 47. HIGHS 71 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ696-271200-
JOHN DAY VALLEY-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS IN THE EVENING, THEN A
CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....38-44.
* MAX HUMIDITY........80-94 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 4 TO 9 MPH.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (183-249) DECREASING TO LOW
(65-109) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE AFTERNOON.
* MAX TEMPERATURE.....69-77...EXCEPT 64-69 RIDGES.
* MIN HUMIDITY........43-52 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW (89-143) INCREASING TO MODERATE TO HIGH
(427-613) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........77-91 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (105-161) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE MORNING, THEN SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS IN
THE AFTERNOON.
* MAX TEMPERATURE.....73-81...EXCEPT 68-73 RIDGES.
* MIN HUMIDITY........42-52 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....30 PERCENT (CHANCE).
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH INCREASING TO NORTHEAST
AROUND 15 MPH IN THE AFTERNOON.
* VENTILATION INDEX...LOW (34-52) INCREASING TO MODERATE TO HIGH
(324-518) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
COOLER. MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS. LOWS 44 TO 50. HIGHS 61 TO 70.
WEST WINDS 3 TO 8 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 38 TO 43. HIGHS 58 TO 66. WEST
WINDS 4 TO 10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 34 TO 39. HIGHS 62 TO 70. NORTHWEST
WINDS 3 TO 8 MPH.
MONDAY
MOSTLY CLEAR. LOWS 37 TO 42. HIGHS 72 TO 80. NORTHEAST
WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 76 TO 85. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ700-271200-
CENTRAL MOUNTAINS OF OREGON-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING, THEN SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....34-42.
* MAX HUMIDITY........80-95 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 5 TO 11 MPH.
* CWR.................50 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 15 MPH.
* VENTILATION INDEX...MODERATE (295-457) DECREASING TO LOW (79-187)
AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.....69-77...EXCEPT 62-68 RIDGES.
* MIN HUMIDITY........38-48 PERCENT...EXCEPT 48-60 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 7 TO 13 MPH WITH GUSTS UP TO 25
MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 7 TO 13 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTH 15 TO 20 MPH.
* VENTILATION INDEX...LOW TO MODERATE (125-217) INCREASING TO HIGH
TO VERY HIGH (574-890) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.....39-49.
* MAX HUMIDITY........80-95 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 5 TO 11 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 9 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (157-277) DECREASING TO LOW
(25-27) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS AND A CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....71-80...EXCEPT 66-71 RIDGES.
* MIN HUMIDITY........40-46 PERCENT...EXCEPT 47-57 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................80 PERCENT.
* CHC OF LIGHTNING....40 PERCENT (CHANCE).
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (29-59) INCREASING TO MODERATE (307-477)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
COOLER. MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 39 TO 47. HIGHS 60 TO 66. WEST WINDS 4 TO
9 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 33 TO 39. HIGHS 59 TO 65.
NORTHWEST WINDS 4 TO 10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 30 TO 36. HIGHS 63 TO 68. NORTHWEST
WINDS 4 TO 9 MPH.
MONDAY
MOSTLY CLEAR. LOWS 34 TO 40. HIGHS 72 TO 78. EAST WINDS
1 TO 6 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 40 TO 47. HIGHS 77 TO 83. EAST
WINDS 1 TO 6 MPH.
ORZ703-271200-
WARM SPRINGS RESERVATION-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....39-44.
* MAX HUMIDITY........71-80 PERCENT...EXCEPT 76-91 PERCENT RIDGES.
* HUMIDITY RECOVERY...GOOD...EXCEPT EXCELLENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 4 TO 9 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE (290-392) DECREASING TO LOW (46-66)
AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....75-82...EXCEPT 63-74 RIDGES.
* MIN HUMIDITY........32-41 PERCENT...EXCEPT 45-60 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH INCREASING TO NORTHEAST
AROUND 20 MPH IN THE AFTERNOON.
* VENTILATION INDEX...LOW (90-150) INCREASING TO HIGH TO VERY HIGH
(674-844) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....47-52.
* MAX HUMIDITY........69-80 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 4 TO 9 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 4 TO 9 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (179-287) DECREASING TO LOW
(25-30) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....78-86...EXCEPT 65-77 RIDGES.
* MIN HUMIDITY........32-43 PERCENT...EXCEPT 44-59 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTH 1 TO
5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTH 2 TO 6
MPH IN THE AFTERNOON.
* CWR.................70 PERCENT.
* CHC OF LIGHTNING....30 PERCENT (CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-46) INCREASING TO MODERATE TO HIGH
(463-543) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
COOLER. MOSTLY CLOUDY WITH SHOWERS AND A CHANCE OF
THUNDERSTORMS. LOWS 43 TO 49. HIGHS 54 TO 68. WEST WINDS 8 TO
14 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 35 TO 40. HIGHS 54 TO 67. WEST
WINDS 8 TO 14 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 33 TO 38. HIGHS 60 TO 71. WEST WINDS
7 TO 13 MPH.
MONDAY
MOSTLY CLEAR. LOWS 37 TO 42. HIGHS 71 TO 80. EAST WINDS
1 TO 6 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 75 TO 86. NORTHEAST
WINDS 2 TO 7 MPH.
ORZ704-271200-
NORTHERN DESCHUTES NATIONAL FOREST-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF RAIN AND SNOW
SHOWERS IN THE EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT.
* MIN TEMPERATURE.....34-40.
* MAX HUMIDITY........79-94 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 2 TO 6 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 3 TO 8 MPH.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE (257-345) DECREASING TO LOW (58-80)
AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....73-80...EXCEPT 60-70 RIDGES.
* MIN HUMIDITY........36-42 PERCENT...EXCEPT 49-64 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 7 TO 13 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTH 15 TO 20 MPH.
* VENTILATION INDEX...LOW (126-164) INCREASING TO HIGH TO VERY HIGH
(608-832) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING.
* MIN TEMPERATURE.....42-48.
* MAX HUMIDITY........73-88 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 3 TO 8 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 10 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 15 MPH BECOMING NORTHWEST
AROUND 5 MPH AFTER MIDNIGHT.
* VENTILATION INDEX...MODERATE (255-343) DECREASING TO LOW (25-32)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE MORNING, THEN SHOWERS AND A CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....76-83...EXCEPT 61-72 RIDGES.
* MIN HUMIDITY........39-46 PERCENT...EXCEPT 50-65 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTH 1 TO 5
MPH IN THE AFTERNOON.
* CWR.................80 PERCENT.
* CHC OF LIGHTNING....30 PERCENT (CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH INCREASING TO NORTHEAST
AROUND 15 MPH IN THE AFTERNOON.
* VENTILATION INDEX...LOW (30-54) INCREASING TO MODERATE (383-485)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
COOLER. MOSTLY CLOUDY WITH SHOWERS AND A CHANCE OF
THUNDERSTORMS. LOWS 39 TO 45. HIGHS 49 TO 63. WEST WINDS 4 TO
10 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 32 TO 37. HIGHS 51 TO 63. WEST
WINDS 5 TO 11 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 28 TO 33. HIGHS 57 TO 68. NORTHWEST
WINDS 4 TO 9 MPH.
MONDAY
MOSTLY CLEAR. LOWS 33 TO 38. HIGHS 66 TO 78. EAST WINDS
1 TO 6 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 69 TO 82. NORTHEAST
WINDS UP TO 5 MPH.
ORZ705-271200-
SOUTHERN DESCHUTES NATIONAL FOREST-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF RAIN AND SNOW
SHOWERS IN THE EVENING, THEN SHOWERS LIKELY AND A SLIGHT CHANCE
OF SNOW SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....32-37.
* MAX HUMIDITY........86-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 6 TO 12 MPH.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 15 TO 20 MPH.
* VENTILATION INDEX...MODERATE (296-496) DECREASING TO LOW TO
MODERATE (114-210) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE MORNING. A CHANCE OF SHOWERS IN
THE AFTERNOON.
* MAX TEMPERATURE.....67-72...EXCEPT 58-65 RIDGES.
* MIN HUMIDITY........44-53 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 6 TO 12 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 7 TO 13 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTH 20 TO 25 MPH.
* VENTILATION INDEX...LOW TO MODERATE (176-254) INCREASING TO HIGH
TO VERY HIGH (673-861) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....38-44.
* MAX HUMIDITY........86-97 PERCENT...EXCEPT 75-90 PERCENT RIDGES.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 4 TO 9 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 5 TO 11 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................70 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE (225-305) DECREASING TO LOW (25-33)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS AND A CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....69-75...EXCEPT 60-67 RIDGES.
* MIN HUMIDITY........46-60 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTH 2 TO 5
MPH IN THE AFTERNOON.
* CWR.................80 PERCENT.
* CHC OF LIGHTNING....40 PERCENT (CHANCE).
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (35-71) INCREASING TO MODERATE (261-381)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
COOLER. MOSTLY CLOUDY WITH SHOWERS AND A CHANCE OF
THUNDERSTORMS. LOWS 37 TO 42. HIGHS 51 TO 61. WEST WINDS 2 TO
7 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 30 TO 35. HIGHS 54 TO 63. WEST
WINDS 2 TO 7 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 27 TO 32. HIGHS 59 TO 67. NORTHWEST
WINDS 1 TO 6 MPH.
MONDAY
MOSTLY CLEAR. LOWS 32 TO 37. HIGHS 69 TO 77. SOUTHEAST
WINDS UP TO 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 38 TO 44. HIGHS 72 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ697-271200-
CENTRAL BLUE MOUNTAINS-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....33-39.
* MAX HUMIDITY........85-98 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 6 TO 12 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 6 TO 12 MPH.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (192-268) DECREASING TO LOW
(73-143) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....66-73.
* MIN HUMIDITY........37-52 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......8500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 15 TO 20 MPH.
* VENTILATION INDEX...LOW (98-176) INCREASING TO VERY HIGH
(776-1050) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.....39-46.
* MAX HUMIDITY........79-94 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (140-194) DECREASING TO LOW (25-39) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS
IN THE AFTERNOON.
* MAX TEMPERATURE.....68-73.
* MIN HUMIDITY........35-47 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING EAST 2 TO 7
MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING EAST 2 TO 7
MPH IN THE AFTERNOON.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH SHIFTING TO THE EAST IN
THE AFTERNOON.
* VENTILATION INDEX...LOW (47-77) INCREASING TO HIGH TO VERY HIGH
(522-948) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 40 TO 46. HIGHS 59 TO 66. WEST WINDS 1 TO
6 MPH.
SATURDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. MOSTLY CLOUDY. LOWS 34 TO 40. HIGHS 56 TO 62.
NORTHWEST WINDS 5 TO 11 MPH.
SUNDAY
A SLIGHT CHANCE OF SHOWERS. MOSTLY CLEAR. LOWS 31 TO
36. HIGHS 59 TO 65. NORTHWEST WINDS 3 TO 8 MPH.
MONDAY
MOSTLY CLEAR. LOWS 34 TO 39. HIGHS 66 TO 73. SOUTH
WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 40 TO 45. HIGHS 71 TO 78.
SOUTHEAST WINDS 1 TO 6 MPH.
ORZ698-271200-
SOUTHERN BLUE MOUNTAINS-
223 PM PDT TUE MAY 26 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS IN THE EVENING, THEN A
CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....33-39.
* MAX HUMIDITY........84-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 7 TO 13 MPH WITH GUSTS UP TO 30
MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 7 TO 13 MPH.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 15 TO 20 MPH.
* VENTILATION INDEX...MODERATE (219-335) DECREASING TO LOW (97-177)
AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....69-76.
* MIN HUMIDITY........31-45 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...EAST WINDS 6 TO 12 MPH.
* RIDGES/UPR SLOPES....EAST WINDS 6 TO 12 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......9500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 15 MPH INCREASING TO EAST
AROUND 25 MPH IN THE AFTERNOON.
* VENTILATION INDEX...LOW (146-192) INCREASING TO VERY HIGH
(1011-1050) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING. A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....39-45.
* MAX HUMIDITY........83-97 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 2 TO 7 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 6 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (103-185) DECREASING TO LOW (31-37) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....69-75.
* MIN HUMIDITY........33-42 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHEAST 2
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....30 PERCENT (CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH SHIFTING TO THE SOUTHEAST
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (49-69) INCREASING TO MODERATE TO VERY
HIGH (454-712) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 39 TO 45. HIGHS 62 TO 69. WEST
WINDS 3 TO 8 MPH.
SATURDAY
A CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 34 TO 41.
HIGHS 60 TO 66. NORTHWEST WINDS 5 TO 11 MPH.
SUNDAY
A SLIGHT CHANCE OF SHOWERS. MOSTLY CLEAR. LOWS 31 TO
37. HIGHS 62 TO 68. NORTHWEST WINDS 3 TO 8 MPH.
MONDAY
MOSTLY CLEAR. LOWS 34 TO 39. HIGHS 70 TO 75. SOUTHEAST
WINDS UP TO 5 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 40 TO 45. HIGHS 75 TO 80. SOUTHEAST
WINDS 1 TO 6 MPH.
8-14 DAY OUTLOOK FOR WEDNESDAY JUNE 3 THROUGH TUESDAY JUNE 9
A GREATER CHANCE OF ABOVE NORMAL TEMPERATURES AND NEAR NORMAL
PRECIPITATION.
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