294
FNUS56 KPDT 171934
FWFPDT
FIRE WEATHER PLANNING FORECAST FOR NE OREGON AND SE WASHINGTON
NATIONAL WEATHER SERVICE PENDLETON OR
1234 PM PDT SUN MAY 17 2026
DISCUSSION
SCATTERED RAIN AND SNOW SHOWERS WITH ISOLATED
THUNDER ACROSS WALLOWA COUNTY TODAY. LOW CHANCES (10 PERCENT OR
LESS) OF RAIN SHOWERS AND THUNDER ELSEWHERE. WARM, DRY CONDITIONS
WILL DEVELOP MONDAY AND PERSIST THROUGH THE WEEK, ALBEIT WITH LOW
(5-30 PERCENT) CHANCES OF ISOLATED SHOWERS IN THE MOUNTAINS MONDAY
AND TUESDAY. DIURNALLY DRIVEN, BREEZY WESTERLY WINDS WILL DEVELOP
EACH DAY THROUGH THE CASCADE GAPS, STRONGEST ON THURSDAY AND
FRIDAY.
***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. ***
WAZ695-181145-
EAST WASHINGTON SOUTH CENTRAL CASCADE MOUNTAINS-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....34-40...EXCEPT 29-35 RIDGES.
* MAX HUMIDITY........70-85 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 4 TO 9 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 (163-317) DECREASING TO LOW
(39-61) AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....56-65...EXCEPT 48-56 RIDGES.
* MIN HUMIDITY........35-50 PERCENT.
* 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.......8000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (91-151) INCREASING TO MODERATE TO HIGH
(424-612) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....36-42...EXCEPT 31-37 RIDGES.
* MAX HUMIDITY........70-85 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 5 TO 11 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.
* VENTILATION INDEX...MODERATE (245-369) DECREASING TO LOW (43-61)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....58-67...EXCEPT 50-58 RIDGES.
* MIN HUMIDITY........40-55 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (89-135) INCREASING TO MODERATE TO HIGH
(439-631) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 36 TO 43. HIGHS 57 TO 70.
NORTHWEST WINDS 6 TO 12 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 39 TO 46. HIGHS 59 TO 71.
NORTHWEST WINDS 4 TO 9 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 40 TO 46. HIGHS 60 TO 72. WEST WINDS
5 TO 11 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 40 TO 47. HIGHS 58 TO 70. WEST
WINDS 6 TO 12 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 38 TO 45. HIGHS 56 TO 68. WEST
WINDS 6 TO 12 MPH.
WAZ690-181145-
KITTITAS VALLEY-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....39-44.
* MAX HUMIDITY........59-74 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT MODERATE RIDGES.
* 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 (349-467) DECREASING TO LOW (45-65)
AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....65-72...EXCEPT 56-65 RIDGES.
* MIN HUMIDITY........25-34 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (102-168) INCREASING TO MODERATE TO HIGH
(422-630) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....41-46.
* MAX HUMIDITY........59-74 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT MODERATE RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 8 TO 14 MPH WITH GUSTS UP TO
25 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 10 TO 16 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.
* VENTILATION INDEX...MODERATE (329-455) DECREASING TO LOW (43-67)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....67-75...EXCEPT 58-68 RIDGES.
* MIN HUMIDITY........28-39 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (77-137) INCREASING TO MODERATE TO VERY
HIGH (486-728) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 69 TO 77.
NORTHWEST WINDS 8 TO 14 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 71 TO 80.
NORTHWEST WINDS 5 TO 11 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 72 TO 80. NORTHWEST
WINDS 9 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 48 TO 53. HIGHS 70 TO 79.
NORTHWEST WINDS 9 TO 15 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 46 TO 51. HIGHS 69 TO 77. WEST
WINDS 9 TO 15 MPH.
WAZ694-181145-
YAKAMA ALPINE DISTRICT-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....34-41...EXCEPT 29-38 RIDGES.
* MAX HUMIDITY........67-82 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 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 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 TO MODERATE (184-264) DECREASING TO LOW
(25-40) AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....62-69...EXCEPT 51-63 RIDGES.
* MIN HUMIDITY........29-42 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING WEST 4 TO 9
MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (44-90) INCREASING TO MODERATE (290-484)
IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....35-42.
* MAX HUMIDITY........70-85 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 3 TO 8 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 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 TO MODERATE (192-264) DECREASING TO LOW
(27-45) AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....65-71...EXCEPT 54-66 RIDGES.
* MIN HUMIDITY........32-47 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING WEST 2 TO 7
MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....WEST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (43-67) INCREASING TO MODERATE (378-468)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 38 TO 45. HIGHS 62 TO 74. WEST
WINDS 4 TO 9 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 42 TO 49. HIGHS 64 TO 77. WEST
WINDS 2 TO 7 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 41 TO 48. HIGHS 64 TO 76. WEST WINDS
4 TO 9 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 43 TO 49. HIGHS 62 TO 75. WEST
WINDS 5 TO 11 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 40 TO 47. HIGHS 60 TO 72. WEST
WINDS 5 TO 11 MPH.
ORZ691-WAZ691-181145-
LOWER COLUMBIA BASIN OF OREGON-LOWER COLUMBIA BASIN OF WASHINGTON-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....39-44.
* MAX HUMIDITY........69-84 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....WEST 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...MODERATE (212-404) DECREASING TO LOW (25-41)
AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....66-73...EXCEPT 62-68 RIDGES.
* MIN HUMIDITY........23-32 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (64-128) INCREASING TO MODERATE TO HIGH
(383-619) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....41-46.
* MAX HUMIDITY........65-80 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS 4 TO 10 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 4 TO 10 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (182-372) DECREASING TO LOW
(26-46) AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....69-76...EXCEPT 64-71 RIDGES.
* MIN HUMIDITY........25-33 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9000 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (50-116) INCREASING TO MODERATE TO HIGH
(446-682) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 71 TO 78. WEST
WINDS 5 TO 11 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 74 TO 82. WEST
WINDS 2 TO 7 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 74 TO 81. WEST WINDS
7 TO 13 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 48 TO 53. HIGHS 74 TO 82. WEST
WINDS 6 TO 12 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 73 TO 80. SOUTHWEST
WINDS 7 TO 13 MPH.
ORZ692-WAZ692-181145-
NORTHERN BLUE MOUNTAINS OF OREGON-BLUE MOUNTAINS OF WASHINGTON-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....32-38.
* MAX HUMIDITY........74-89 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 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.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (156-288) DECREASING TO LOW
(26-32) AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE AFTERNOON.
* MAX TEMPERATURE.....56-65...EXCEPT 50-55 RIDGES.
* MIN HUMIDITY........36-51 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 1 TO 6 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (89-133) INCREASING TO MODERATE TO HIGH
(413-571) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....34-41.
* MAX HUMIDITY........66-81 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH BECOMING
SOUTH UP TO 5 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (63-163) DECREASING TO LOW (27-39) AFTER
MIDNIGHT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....60-69...EXCEPT 53-59 RIDGES.
* MIN HUMIDITY........34-47 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING WEST 1 TO 6
MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING WEST 2 TO 5
MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (71-113) INCREASING TO HIGH (526-660) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 38 TO 45. HIGHS 59 TO 69. WEST
WINDS 1 TO 6 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 40 TO 47. HIGHS 63 TO 73. WEST
WINDS 1 TO 6 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 41 TO 49. HIGHS 64 TO 74. SOUTHWEST
WINDS 1 TO 6 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 42 TO 50. HIGHS 65 TO 75.
SOUTHWEST WINDS 2 TO 7 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 42 TO 49. HIGHS 64 TO 74. WEST
WINDS 3 TO 8 MPH.
ORZ693-WAZ693-181145-
CANYON GRASSLANDS OF WALLOWA COUNTY-
SOUTHEAST WASHINGTON GRANDE RONDE VALLEY-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....29-37.
* MAX HUMIDITY........78-93 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 3 TO 8 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 7 TO 13 MPH BECOMING NORTHWEST 1
TO 6 MPH AFTER MIDNIGHT.
* 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 (166-266) DECREASING TO LOW
(25-29) AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....55-64...EXCEPT 49-57 RIDGES.
* MIN HUMIDITY........37-48 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 3 TO 8 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (40-108) INCREASING TO MODERATE TO HIGH
(404-580) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* MIN TEMPERATURE.....32-40.
* MAX HUMIDITY........67-82 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS UP TO 5 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 2 TO 7 MPH SHIFTING TO THE
SOUTHWEST 2 TO 5 MPH AFTER MIDNIGHT.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE SOUTH
AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (44-102) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....60-69...EXCEPT 55-61 RIDGES.
* MIN HUMIDITY........29-36 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9000 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (40-64) INCREASING TO HIGH (608-692) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 36 TO 44. HIGHS 62 TO 70. WEST
WINDS 1 TO 6 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 38 TO 46. HIGHS 66 TO 74.
NORTHWEST WINDS 1 TO 6 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 40 TO 48. HIGHS 67 TO 76. WEST WINDS
1 TO 6 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 41 TO 49. HIGHS 70 TO 79. WEST
WINDS 2 TO 7 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 41 TO 49. HIGHS 69 TO 78. WEST
WINDS 3 TO 8 MPH.
ORZ701-181145-
EASTERN COLUMBIA RIVER GORGE OF OREGON-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR THEN BECOMING MOSTLY CLOUDY.
* MIN TEMPERATURE.....38-43.
* MAX HUMIDITY........71-86 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WINDS WEST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE (235-315) DECREASING TO LOW (30-44)
AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....65-70.
* MIN HUMIDITY........28-38 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 1 TO 5 MPH SHIFTING TO THE
NORTHWEST 5 TO 11 MPH IN THE AFTERNOON. IN THE EASTERN
COLUMBIA RIVER GORGE, WEST WINDS 2 TO 7 MPH INCREASING TO 7
TO 13 MPH WITH GUSTS UP TO 25 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8500 FT AGL.
* TRANSPORT WINDS.....WEST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (62-106) INCREASING TO MODERATE TO HIGH
(464-654) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....39-44.
* MAX HUMIDITY........73-88 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 8 TO 14 MPH WITH GUSTS UP TO 25
MPH DECREASING TO 2 TO 7 MPH AFTER MIDNIGHT. IN THE EASTERN
COLUMBIA RIVER GORGE, WEST WINDS 9 TO 15 MPH DECREASING TO 4
TO 9 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....WEST WINDS 6 TO 12 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE (270-362) DECREASING TO LOW (31-45)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....68-73...EXCEPT 63-69 RIDGES.
* MIN HUMIDITY........32-41 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHWEST 3
TO 8 MPH IN THE AFTERNOON. IN THE EASTERN COLUMBIA RIVER
GORGE, WEST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....WEST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (48-100) INCREASING TO MODERATE TO HIGH
(458-560) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 42 TO 47. HIGHS 71 TO 76. WEST
WINDS 5 TO 11 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 45 TO 50. HIGHS 74 TO 79. WEST
WINDS 3 TO 8 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 74 TO 79. WEST WINDS
6 TO 12 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 73 TO 78. WEST
WINDS 6 TO 12 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 71 TO 76. WEST
WINDS 6 TO 12 MPH.
ORZ702-181145-
EAST SLOPES OF THE MT. HOOD NATIONAL FOREST-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* MIN TEMPERATURE.....32-39.
* MAX HUMIDITY........72-87 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT EXCELLENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 1 TO 6 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 1 TO 5 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 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 (151-237) DECREASING TO LOW
(35-45) AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....60-67...EXCEPT 53-62 RIDGES.
* MIN HUMIDITY........31-46 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHWEST 1
TO 6 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (68-100) INCREASING TO MODERATE (332-494)
IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....33-40.
* MAX HUMIDITY........72-87 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT EXCELLENT RIDGES.
* 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....WEST WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE (202-284) DECREASING TO LOW (40-50)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....64-71...EXCEPT 57-66 RIDGES.
* MIN HUMIDITY........33-46 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING WEST 1 TO 5
MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....WEST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (64-92) INCREASING TO MODERATE TO HIGH
(425-535) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 37 TO 44. HIGHS 61 TO 73. WEST
WINDS 3 TO 8 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 41 TO 48. HIGHS 64 TO 76. WEST
WINDS 1 TO 6 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 40 TO 47. HIGHS 65 TO 76. WEST WINDS
3 TO 8 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 41 TO 48. HIGHS 63 TO 75. WEST
WINDS 3 TO 8 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 40 TO 46. HIGHS 62 TO 73. WEST
WINDS 3 TO 8 MPH.
ORZ695-181145-
EAGLE CAP WILDERNESS-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF RAIN AND SNOW
SHOWERS IN THE EVENING. A SLIGHT CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT.
* MIN TEMPERATURE.....30-35...EXCEPT 23-30 RIDGES.
* MAX HUMIDITY........74-85 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT EXCELLENT RIDGES.
* 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 20 MPH DECREASING TO AROUND 10
MPH AFTER MIDNIGHT.
* VENTILATION INDEX...MODERATE (257-377) DECREASING TO LOW (33-73)
AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS, THUNDERSTORMS AND SNOW SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.....52-62...EXCEPT 41-53 RIDGES.
* MIN HUMIDITY........37-52 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....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (133-269) INCREASING TO HIGH
TO VERY HIGH (523-769) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....33-38...EXCEPT 26-33 RIDGES.
* MAX HUMIDITY........64-74 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 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....NORTHWEST WINDS 3 TO 8 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 TO MODERATE (104-204) DECREASING TO LOW
(26-38) AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....57-66...EXCEPT 45-57 RIDGES.
* MIN HUMIDITY........29-44 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING WEST 2 TO 6
MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (36-86) INCREASING TO MODERATE TO HIGH
(497-649) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 32 TO 41. HIGHS 53 TO 68.
NORTHWEST WINDS 2 TO 7 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 34 TO 43. HIGHS 57 TO 72.
NORTHWEST WINDS 2 TO 7 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 36 TO 45. HIGHS 58 TO 73. WEST WINDS
2 TO 7 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 37 TO 46. HIGHS 61 TO 76. WEST
WINDS 3 TO 8 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 37 TO 46. HIGHS 61 TO 75. WEST
WINDS 4 TO 9 MPH.
ORZ694-181145-
GRANDE RONDE VALLEY OF OREGON-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....29-34.
* MAX HUMIDITY........84-99 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 8 TO 14 MPH WITH GUSTS UP TO 30
MPH BECOMING NORTHWEST 1 TO 6 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....NORTH WINDS 9 TO 15 MPH BECOMING NORTHWEST 2
TO 7 MPH AFTER MIDNIGHT.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 20 MPH BECOMING NORTHWEST AROUND
10 MPH AFTER MIDNIGHT.
* VENTILATION INDEX...MODERATE (324-476) DECREASING TO LOW (26-42)
AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....61-66.
* MIN HUMIDITY........33-38 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 5 TO 11 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......8500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW (97-187) INCREASING TO HIGH TO VERY HIGH
(670-942) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....32-37.
* MAX HUMIDITY........75-90 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 9 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 4 TO 9 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (146-232) DECREASING TO LOW
(25-30) AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....65-70.
* MIN HUMIDITY........30-35 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (37-55) INCREASING TO MODERATE TO HIGH
(446-550) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 36 TO 41. HIGHS 68 TO 73.
NORTHWEST WINDS 1 TO 6 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 38 TO 43. HIGHS 71 TO 76.
NORTHWEST WINDS 3 TO 8 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 40 TO 45. HIGHS 73 TO 78. NORTHWEST
WINDS 4 TO 9 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 41 TO 46. HIGHS 75 TO 80. WEST
WINDS 2 TO 7 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 41 TO 46. HIGHS 74 TO 79. NORTHWEST
WINDS 4 TO 9 MPH.
ORZ699-181145-
WESTERN FORESTED BLUE MOUNTAINS-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....28-33.
* MAX HUMIDITY........75-89 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 3 TO 8 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 6 TO 12 MPH SHIFTING TO THE
NORTHWEST 1 TO 6 MPH AFTER MIDNIGHT.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE TO HIGH (395-531) DECREASING TO LOW
(28-50) AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....56-62...EXCEPT 50-56 RIDGES.
* MIN HUMIDITY........28-39 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHWEST 2
TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (85-209) INCREASING TO HIGH
TO VERY HIGH (607-835) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MIN TEMPERATURE.....31-36.
* MAX HUMIDITY........63-78 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 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....NORTHWEST WINDS 2 TO 7 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...MODERATE (210-298) DECREASING TO LOW (25-34)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....61-67...EXCEPT 55-61 RIDGES.
* MIN HUMIDITY........25-35 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING WEST 2 TO 5
MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......10000 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (45-99) INCREASING TO HIGH TO VERY HIGH
(596-746) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 36 TO 41. HIGHS 60 TO 69.
NORTHWEST WINDS UP TO 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 38 TO 43. HIGHS 64 TO 73.
NORTHWEST WINDS 1 TO 6 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 39 TO 44. HIGHS 66 TO 74. WEST WINDS
1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 67 TO 76. WEST
WINDS 1 TO 6 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 40 TO 45. HIGHS 66 TO 75. WEST
WINDS 2 TO 7 MPH.
ORZ696-181145-
JOHN DAY VALLEY-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....30-36.
* MAX HUMIDITY........72-87 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 5 TO 11 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 5 TO 11 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 15 MPH BECOMING NORTHWEST AROUND
5 MPH AFTER MIDNIGHT.
* VENTILATION INDEX...MODERATE TO HIGH (474-596) DECREASING TO LOW
(25-33) AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....59-67...EXCEPT 54-59 RIDGES.
* MIN HUMIDITY........20-28 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHWEST 2
TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHWEST 3
TO 6 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (53-105) INCREASING TO HIGH TO VERY HIGH
(592-774) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....34-39.
* MAX HUMIDITY........63-76 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT MODERATE RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 1 TO 6 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....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...MODERATE (257-351) DECREASING TO LOW (25)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....64-72...EXCEPT 59-64 RIDGES.
* MIN HUMIDITY........21-26 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHWEST 1
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING WEST 2 TO 6
MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (29-59) INCREASING TO HIGH (549-669) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 38 TO 43. HIGHS 66 TO 75.
NORTHWEST WINDS 1 TO 6 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 40 TO 46. HIGHS 70 TO 78.
NORTHWEST WINDS 1 TO 6 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 71 TO 80. NORTHWEST
WINDS 2 TO 7 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 73 TO 81. WEST
WINDS 2 TO 7 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 72 TO 81. WEST WINDS
2 TO 7 MPH.
ORZ700-181145-
CENTRAL MOUNTAINS OF OREGON-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....26-35.
* MAX HUMIDITY........74-89 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 5 TO 11 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...HIGH TO VERY HIGH (516-784) DECREASING TO LOW
(25-42) AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....60-67...EXCEPT 53-58 RIDGES.
* MIN HUMIDITY........15-23 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHWEST 2
TO 7 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHWEST 2
TO 6 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......10500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (44-104) INCREASING TO HIGH TO VERY HIGH
(575-725) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....30-37.
* MAX HUMIDITY........66-79 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 3 TO 8 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....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...MODERATE TO HIGH (351-527) DECREASING TO LOW
(25-34) AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....66-72...EXCEPT 58-64 RIDGES.
* MIN HUMIDITY........17-24 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHWEST 1
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHWEST 1
TO 5 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (32-64) INCREASING TO HIGH (521-695) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 35 TO 42. HIGHS 68 TO 75.
NORTHWEST WINDS 3 TO 8 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 38 TO 45. HIGHS 72 TO 79.
NORTHWEST WINDS 3 TO 8 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 38 TO 44. HIGHS 73 TO 80. NORTHWEST
WINDS 4 TO 9 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 39 TO 46. HIGHS 74 TO 80. WEST
WINDS 3 TO 8 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 39 TO 45. HIGHS 73 TO 79. WEST WINDS
3 TO 8 MPH.
ORZ703-181145-
WARM SPRINGS RESERVATION-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....33-38.
* MAX HUMIDITY........72-87 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT EXCELLENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....WEST 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...MODERATE (256-402) DECREASING TO LOW (26-42)
AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....62-71...EXCEPT 50-60 RIDGES.
* MIN HUMIDITY........21-32 PERCENT...EXCEPT 34-49 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHWEST 4
TO 9 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....WEST WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (61-101) INCREASING TO HIGH (510-694) IN
THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....34-39.
* MAX HUMIDITY........71-86 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT EXCELLENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE (273-393) DECREASING TO LOW (29-47)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....66-75...EXCEPT 55-64 RIDGES.
* MIN HUMIDITY........22-33 PERCENT...EXCEPT 33-48 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING WEST 2 TO 7
MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (45-93) INCREASING TO HIGH (531-631) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 39 TO 44. HIGHS 66 TO 78.
NORTHWEST WINDS 5 TO 11 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS 69 TO 81.
NORTHWEST WINDS 3 TO 8 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS 69 TO 82. WEST WINDS
6 TO 12 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS 67 TO 81. WEST
WINDS 4 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 42 TO 47. HIGHS 67 TO 80. WEST
WINDS 5 TO 11 MPH.
ORZ704-181145-
NORTHERN DESCHUTES NATIONAL FOREST-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....28-33.
* MAX HUMIDITY........69-84 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 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 3 TO 8 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...MODERATE (314-438) DECREASING TO LOW (25-26)
AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....62-67...EXCEPT 49-59 RIDGES.
* MIN HUMIDITY........23-29 PERCENT...EXCEPT 32-47 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHWEST 3
TO 8 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (57-75) INCREASING TO MODERATE TO HIGH
(461-559) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....29-35.
* MAX HUMIDITY........70-85 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.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 3 TO 8 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...MODERATE (252-320) DECREASING TO LOW (27-37)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....67-73...EXCEPT 53-64 RIDGES.
* MIN HUMIDITY........25-30 PERCENT...EXCEPT 32-47 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHWEST 2
TO 7 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (52-76) INCREASING TO HIGH (507-571) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
MOSTLY CLEAR. LOWS 34 TO 40. HIGHS 62 TO 75.
NORTHWEST WINDS 2 TO 7 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 38 TO 43. HIGHS 64 TO 77.
NORTHWEST WINDS 1 TO 6 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 37 TO 42. HIGHS 65 TO 78. WEST WINDS
4 TO 9 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 39 TO 44. HIGHS 64 TO 77. WEST
WINDS 3 TO 8 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 38 TO 43. HIGHS 62 TO 76. WEST WINDS
4 TO 9 MPH.
ORZ705-181145-
SOUTHERN DESCHUTES NATIONAL FOREST-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....24-30.
* MAX HUMIDITY........80-95 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 3 TO 8 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 5 TO 11 MPH DECREASING TO UP TO
5 MPH AFTER MIDNIGHT.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE TO VERY HIGH (494-762) DECREASING TO
LOW (25-41) AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....59-64...EXCEPT 49-57 RIDGES.
* MIN HUMIDITY........17-25 PERCENT...EXCEPT 22-37 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHWEST 1
TO 6 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......10500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (40-94) INCREASING TO MODERATE TO HIGH
(448-590) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....27-32.
* MAX HUMIDITY........75-90 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 5 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 2 TO 7 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...MODERATE (258-498) DECREASING TO LOW (25-39)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....65-70...EXCEPT 55-63 RIDGES.
* MIN HUMIDITY........20-28 PERCENT...EXCEPT 24-39 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHWEST 1
TO 5 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (40-62) INCREASING TO HIGH (502-612) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
MOSTLY CLEAR. LOWS 32 TO 37. HIGHS 65 TO 75.
NORTHWEST WINDS 1 TO 6 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 36 TO 41. HIGHS 68 TO 77. NORTH
WINDS 1 TO 6 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 35 TO 40. HIGHS 69 TO 79. NORTHWEST
WINDS 1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 37 TO 42. HIGHS 68 TO 78. WEST
WINDS 1 TO 6 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 36 TO 41. HIGHS 66 TO 77. WEST WINDS
1 TO 6 MPH.
ORZ697-181145-
CENTRAL BLUE MOUNTAINS-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....26-31.
* MAX HUMIDITY........72-87 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 6 TO 12 MPH SHIFTING TO THE
NORTHWEST 1 TO 6 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....NORTH WINDS 5 TO 11 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 20 MPH DECREASING TO AROUND 10
MPH AFTER MIDNIGHT.
* VENTILATION INDEX...HIGH TO VERY HIGH (603-751) DECREASING TO LOW
(41-67) AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* MAX TEMPERATURE.....55-60...EXCEPT 50-55 RIDGES.
* MIN HUMIDITY........24-31 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHWEST 2
TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (129-261) INCREASING TO VERY
HIGH (795-925) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY CLEAR.
* MIN TEMPERATURE.....29-34.
* MAX HUMIDITY........60-72 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT MODERATE RIDGES.
* 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 2 TO 7 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...MODERATE (263-333) DECREASING TO LOW (25-37)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....61-66...EXCEPT 56-61 RIDGES.
* MIN HUMIDITY........22-27 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING WEST 2 TO 6
MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......10000 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (61-129) INCREASING TO VERY HIGH
(730-886) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 34 TO 39. HIGHS 62 TO 69.
NORTHWEST WINDS 1 TO 6 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 37 TO 42. HIGHS 66 TO 72.
NORTHWEST WINDS 1 TO 6 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 38 TO 43. HIGHS 67 TO 74. NORTHWEST
WINDS 2 TO 7 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 39 TO 44. HIGHS 69 TO 76. WEST
WINDS 2 TO 7 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 40 TO 45. HIGHS 69 TO 75. WEST WINDS
3 TO 8 MPH.
ORZ698-181145-
SOUTHERN BLUE MOUNTAINS-
1234 PM PDT SUN MAY 17 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....25-31.
* MAX HUMIDITY........73-88 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 6 TO 12 MPH DECREASING TO UP TO
5 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....NORTH WINDS 4 TO 10 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 15 TO 20 MPH.
* VENTILATION INDEX...VERY HIGH (735-831) DECREASING TO LOW (50-66)
AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* MAX TEMPERATURE.....56-61...EXCEPT 51-56 RIDGES.
* MIN HUMIDITY........17-24 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHWEST 2
TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......11000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (157-219) INCREASING TO VERY
HIGH (857-1007) IN THE AFTERNOON.
MONDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY CLEAR.
* MIN TEMPERATURE.....29-34.
* MAX HUMIDITY........60-72 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT MODERATE RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 1 TO 5 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 5 MPH IN THE EVENING
BECOMING 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...MODERATE (343-443) DECREASING TO LOW (31-39)
AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....62-67...EXCEPT 57-62 RIDGES.
* MIN HUMIDITY........17-22 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......10500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (43-79) INCREASING TO VERY HIGH (789-909)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
WEDNESDAY
PARTLY CLOUDY. LOWS 34 TO 39. HIGHS 67 TO 73.
NORTHWEST WINDS UP TO 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 36 TO 42. HIGHS 70 TO 76.
NORTHWEST WINDS 2 TO 7 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 37 TO 43. HIGHS 72 TO 78. NORTHWEST
WINDS 3 TO 8 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 39 TO 45. HIGHS 74 TO 79. WEST
WINDS 2 TO 7 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 39 TO 45. HIGHS 73 TO 79. WEST WINDS
3 TO 8 MPH.
8-14 DAY OUTLOOK FOR MONDAY MAY 25 THROUGH SUNDAY MAY 31
A GREATER CHANCE OF NEAR- TO ABOVE-NORMAL TEMPERATURES AND NEAR-
NORMAL PRECIPITATION.
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