011
FNUS56 KPDT 032156
FWFPDT
FIRE WEATHER PLANNING FORECAST FOR NE OREGON AND SE WASHINGTON
NATIONAL WEATHER SERVICE PENDLETON OR
256 PM PDT THU SEP 3 2026
DISCUSSION
COOLER, WET WEATHER PATTERN WILL PREVAIL THROUGH THE
WEEKEND WITH HIGHS AS MUCH AS 10 TO 15 DEGREES BELOW NORMAL
THROUGH SATURDAY. WET CONDITIONS OVERALL WITH HIGH CHANCES FOR
WETTING RAINS IN THE EASTERN MOUNTAINS TONIGHT (ABOVE 70%).
OTHERWISE, ELEVATED AFTERNOON HUMIDITY AND LIGHT WILLS WILL
PROMOTE LOW FIRE WEATHER CONCERNS INTO EARLY NEXT WEEK WITH
REPEATED ROUNDS OF MOUNTAIN.
***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. ***
WAZ695-041115-
EAST WASHINGTON SOUTH CENTRAL CASCADE MOUNTAINS-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE EVENING.
* MIN TEMPERATURE.....37-43.
* MAX HUMIDITY........81-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (49-105) DECREASING TO LOW (25-35) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE MORNING, THEN A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....56-64...EXCEPT 47-55 RIDGES.
* MIN HUMIDITY........50-65 PERCENT...EXCEPT 62-77 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE
SOUTHEAST IN THE AFTERNOON.
* VENTILATION INDEX...LOW (35-63) INCREASING TO LOW TO MODERATE
(67-239) IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....38-44.
* MAX HUMIDITY........78-93 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (38-74) DECREASING TO LOW (25-28) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE MORNING, THEN A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....57-65...EXCEPT 49-57 RIDGES.
* MIN HUMIDITY........51-65 PERCENT...EXCEPT 62-77 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH SHIFTING TO THE SOUTH IN
THE AFTERNOON.
* VENTILATION INDEX...LOW (25-32) INCREASING TO LOW TO MODERATE
(191-271) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 39 TO 46.
HIGHS 57 TO 71. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 42 TO 49.
HIGHS 54 TO 67. WEST WINDS 4 TO 9 MPH.
TUESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
42 TO 49. HIGHS 59 TO 72. WEST WINDS 4 TO 9 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 45 TO 50. HIGHS 64 TO 77.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 48 TO 53. HIGHS 63 TO 76. WEST
WINDS UP TO 5 MPH.
WAZ690-041115-
KITTITAS VALLEY-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* MIN TEMPERATURE.....44-50.
* MAX HUMIDITY........74-89 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (75-129) DECREASING TO LOW (25-37) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE MORNING, THEN A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....63-69...EXCEPT 53-63 RIDGES.
* MIN HUMIDITY........43-54 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....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (30-60) INCREASING TO MODERATE (228-336)
IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE EVENING.
* MIN TEMPERATURE.....44-50.
* MAX HUMIDITY........71-86 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (50-100) DECREASING TO LOW (25-31) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS
IN THE AFTERNOON.
* MAX TEMPERATURE.....64-71...EXCEPT 54-64 RIDGES.
* MIN HUMIDITY........44-56 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (25-39) INCREASING TO MODERATE (267-331)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
46 TO 52. HIGHS 68 TO 75. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 49 TO 55.
HIGHS 67 TO 75. NORTHWEST WINDS 6 TO 12 MPH.
TUESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
49 TO 54. HIGHS 70 TO 77. NORTHWEST WINDS 4 TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 50 TO 56. HIGHS 74 TO 81.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 53 TO 58. HIGHS 75 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
WAZ694-041115-
YAKAMA ALPINE DISTRICT-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS.
* MIN TEMPERATURE.....36-44.
* MAX HUMIDITY........79-94 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (89-163) DECREASING TO LOW (25-36) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS
AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....60-68...EXCEPT 49-62 RIDGES.
* MIN HUMIDITY........45-55 PERCENT...EXCEPT 51-66 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (32-66) INCREASING TO LOW TO MODERATE
(156-268) IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....37-45.
* MAX HUMIDITY........79-94 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (57-93) DECREASING TO LOW (25-27) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....61-69...EXCEPT 50-63 RIDGES.
* MIN HUMIDITY........49-64 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (25) INCREASING TO LOW TO MODERATE
(194-248) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 39 TO 47.
HIGHS 60 TO 72. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 42 TO 50.
HIGHS 58 TO 72. WEST WINDS 3 TO 8 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 41 TO 48. HIGHS 63 TO 76. WEST
WINDS 3 TO 8 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 44 TO 51. HIGHS 67 TO 80.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 46 TO 54. HIGHS 67 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ691-WAZ691-041115-
LOWER COLUMBIA BASIN OF OREGON-LOWER COLUMBIA BASIN OF WASHINGTON-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....43-49.
* MAX HUMIDITY........81-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS 1 TO 5 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (85-187) DECREASING TO LOW (28-82) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS.
* MAX TEMPERATURE.....65-72.
* MIN HUMIDITY........39-51 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (53-113) INCREASING TO MODERATE (275-379)
IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........80-95 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (52-126) DECREASING TO LOW (25-30) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS.
* MAX TEMPERATURE.....66-73...EXCEPT 62-68 RIDGES.
* MIN HUMIDITY........41-53 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-44) INCREASING TO MODERATE (207-269)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 46 TO
51. HIGHS 68 TO 76. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 48 TO
54. HIGHS 69 TO 77. WEST WINDS 6 TO 12 MPH.
TUESDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 47 TO
53. HIGHS 73 TO 79. SOUTHWEST WINDS 6 TO 12 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 49 TO 54. HIGHS 77 TO 84.
NORTHWEST WINDS UP TO 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 51 TO 57. HIGHS 78 TO 84.
SOUTHWEST WINDS 1 TO 6 MPH.
ORZ692-WAZ692-041115-
NORTHERN BLUE MOUNTAINS OF OREGON-BLUE MOUNTAINS OF WASHINGTON-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS IN THE EVENING, THEN A
CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....38-46.
* MAX HUMIDITY........87-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................70 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....EAST AROUND 5 MPH SHIFTING TO THE WEST AFTER
MIDNIGHT.
* VENTILATION INDEX...LOW (64-82) DECREASING TO LOW (31-59) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MAX TEMPERATURE.....59-67...EXCEPT 52-57 RIDGES.
* MIN HUMIDITY........52-67 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (69-105) INCREASING TO MODERATE (215-323)
IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....38-46.
* MAX HUMIDITY........82-97 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (29-61) DECREASING TO LOW (25-27) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....61-69...EXCEPT 55-61 RIDGES.
* MIN HUMIDITY........50-65 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-38) INCREASING TO LOW TO MODERATE
(195-309) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 39 TO 48.
HIGHS 60 TO 70. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS.
LOWS 41 TO 50. HIGHS 57 TO 68. WEST WINDS 3 TO 8 MPH.
TUESDAY
A CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 40 TO 49.
HIGHS 65 TO 75. SOUTHWEST WINDS 2 TO 7 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 42 TO 51. HIGHS 69 TO 79.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 45 TO 54. HIGHS 69 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ693-WAZ693-041115-
CANYON GRASSLANDS OF WALLOWA COUNTY-
SOUTHEAST WASHINGTON GRANDE RONDE VALLEY-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. SHOWERS.
* MIN TEMPERATURE.....37-47.
* MAX HUMIDITY........83-98 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....SOUTHWEST WINDS 1 TO 6 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................90 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH SHIFTING TO THE WEST
AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (60-102) DECREASING TO LOW (43-83) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS.
* MAX TEMPERATURE.....58-66...EXCEPT 52-59 RIDGES.
* MIN HUMIDITY........45-57 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (51-71) INCREASING TO MODERATE (212-452)
IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING, THEN A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....36-48.
* MAX HUMIDITY........79-94 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (38-80) DECREASING TO LOW (25) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS.
* MAX TEMPERATURE.....63-71...EXCEPT 58-64 RIDGES.
* MIN HUMIDITY........38-51 PERCENT.
* 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.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-28) INCREASING TO MODERATE (235-473)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. PARTLY CLOUDY. LOWS 38 TO 50. HIGHS 63 TO 72.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS.
LOWS 39 TO 51. HIGHS 58 TO 68. WEST WINDS 1 TO 5 MPH.
TUESDAY
A CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 37 TO 49.
HIGHS 67 TO 76. SOUTH WINDS 3 TO 8 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 39 TO 51. HIGHS 71 TO 80.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
A SLIGHT CHANCE OF SHOWERS. MOSTLY CLEAR. LOWS 42 TO
54. HIGHS 72 TO 81. SOUTHWEST WINDS UP TO 5 MPH.
ORZ701-041115-
EASTERN COLUMBIA RIVER GORGE OF OREGON-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING, THEN A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....41-48.
* MAX HUMIDITY........84-99 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH. IN THE
EASTERN COLUMBIA RIVER GORGE, WEST WINDS 1 TO 5 MPH IN THE
EVENING BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (103-147) DECREASING TO LOW (26-38) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS
AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....65-70.
* MIN HUMIDITY........48-63 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (38-50) INCREASING TO LOW TO MODERATE
(116-220) IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....43-49.
* MAX HUMIDITY........84-99 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (83-119) DECREASING TO LOW (25-33) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS.
* MAX TEMPERATURE.....66-72.
* MIN HUMIDITY........47-60 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH SHIFTING TO THE SOUTH IN
THE AFTERNOON.
* VENTILATION INDEX...LOW (25-34) INCREASING TO MODERATE (204-262)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 46 TO 52.
HIGHS 68 TO 74. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 47 TO 54.
HIGHS 69 TO 74. WEST WINDS 6 TO 12 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 46 TO 53. HIGHS 74 TO 79. WEST
WINDS 4 TO 9 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 48 TO 54. HIGHS 77 TO 82.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 77 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ702-041115-
EAST SLOPES OF THE MT. HOOD NATIONAL FOREST-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....37-43.
* MAX HUMIDITY........81-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (111-157) DECREASING TO LOW (36-64) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE MORNING, THEN SHOWERS LIKELY AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....59-67...EXCEPT 53-63 RIDGES.
* MIN HUMIDITY........45-54 PERCENT...EXCEPT 51-66 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (45-67) INCREASING TO LOW (91-189) IN THE
AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....38-45.
* MAX HUMIDITY........81-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (64-96) DECREASING TO LOW (26-30) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MAX TEMPERATURE.....61-68...EXCEPT 55-64 RIDGES.
* MIN HUMIDITY........49-64 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-26) INCREASING TO MODERATE (209-285)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 41 TO 48. HIGHS 58 TO 69. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 43 TO 49.
HIGHS 58 TO 71. WEST WINDS 2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 42 TO 48. HIGHS 64 TO 75. WEST
WINDS UP TO 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 46 TO 52. HIGHS 68 TO 79.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 49 TO 55. HIGHS 67 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ695-041115-
EAGLE CAP WILDERNESS-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN A CHANCE OF RAIN AND SNOW
SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....37-44...EXCEPT 32-39 RIDGES.
* MAX HUMIDITY........89-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................100 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH SHIFTING TO THE WEST
AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (44-102) DECREASING TO LOW (54-90) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SNOW SHOWERS IN THE MORNING. A CHANCE OF SHOWERS.
* MAX TEMPERATURE.....54-64...EXCEPT 44-54 RIDGES.
* MIN HUMIDITY........49-64 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHWEST 1
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (50-98) INCREASING TO MODERATE TO HIGH
(375-559) IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING.
* MIN TEMPERATURE.....38-44...EXCEPT 33-40 RIDGES.
* MAX HUMIDITY........79-94 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH SHIFTING TO THE NORTH
AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (29-91) DECREASING TO LOW (25-30) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF RAIN AND SNOW SHOWERS IN THE MORNING. A CHANCE
OF SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.....59-69...EXCEPT 49-60 RIDGES.
* MIN HUMIDITY........40-55 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHWEST 1
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING SOUTHWEST 2
TO 7 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-47) INCREASING TO MODERATE TO HIGH
(421-641) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. PARTLY CLOUDY. LOWS 38 TO 45. HIGHS 55 TO 69.
NORTHEAST WINDS 1 TO 5 MPH.
LABOR DAY
SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS.
LOWS 38 TO 46. HIGHS 48 TO 63. NORTHWEST WINDS 1 TO 5 MPH.
TUESDAY
A CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 37 TO 45.
HIGHS 56 TO 71. SOUTH WINDS 1 TO 6 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 40 TO 47. HIGHS 61 TO 76.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 43 TO 51. HIGHS 62 TO 76.
SOUTHWEST WINDS 1 TO 5 MPH.
ORZ694-041115-
GRANDE RONDE VALLEY OF OREGON-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN SHOWERS LIKELY AFTER MIDNIGHT.
* MIN TEMPERATURE.....37-42.
* MAX HUMIDITY........95-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................90 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (32-64) INCREASING TO LOW (52-94) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE MORNING, THEN A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....62-68.
* MIN HUMIDITY........48-53 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (35-51) INCREASING TO MODERATE (280-422)
IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....37-42.
* MAX HUMIDITY........91-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (33-61) DECREASING TO LOW (25-36) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS
AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....67-72.
* MIN HUMIDITY........43-48 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....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (25-32) INCREASING TO MODERATE (302-386)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. PARTLY CLOUDY. LOWS 38 TO 43. HIGHS 68 TO 73.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS.
LOWS 40 TO 46. HIGHS 64 TO 70. NORTHWEST WINDS 1 TO 6 MPH.
TUESDAY
A CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 39 TO 44.
HIGHS 71 TO 77. SOUTH WINDS 1 TO 6 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 41 TO 46. HIGHS 75 TO 81.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 76 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ699-041115-
WESTERN FORESTED BLUE MOUNTAINS-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS IN THE EVENING, THEN A
CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....34-40.
* MAX HUMIDITY........84-99 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................60 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (37-87) INCREASING TO LOW (56-86) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS
AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....58-64...EXCEPT 52-58 RIDGES.
* MIN HUMIDITY........41-55 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (67-111) INCREASING TO MODERATE (349-497)
IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....35-42.
* MAX HUMIDITY........81-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (36-84) DECREASING TO LOW (25-34) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....61-67...EXCEPT 55-62 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.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-30) INCREASING TO MODERATE TO HIGH
(296-628) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. PARTLY CLOUDY. LOWS 37 TO 43. HIGHS 59 TO 68.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS.
LOWS 39 TO 45. HIGHS 56 TO 65. WEST WINDS 1 TO 6 MPH.
TUESDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 37 TO
44. HIGHS 65 TO 74. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 41 TO 47. HIGHS 69 TO 77.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 44 TO 51. HIGHS 70 TO 78. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ696-041115-
JOHN DAY VALLEY-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY IN THE EVENING,
THEN A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....36-43.
* MAX HUMIDITY........80-95 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................50 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (33-97) DECREASING TO LOW (33-55) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE MORNING, THEN A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....59-67...EXCEPT 54-59 RIDGES.
* MIN HUMIDITY........38-47 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....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (59-83) INCREASING TO MODERATE (324-498)
IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....38-45.
* MAX HUMIDITY........76-91 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (49-103) DECREASING TO LOW (25-28) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS.
* MAX TEMPERATURE.....62-70...EXCEPT 57-62 RIDGES.
* MIN HUMIDITY........34-45 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25) INCREASING TO MODERATE (207-417) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. MOSTLY CLOUDY. LOWS 40 TO 47. HIGHS 62 TO 71.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 41 TO 49. HIGHS 62 TO 70. WEST
WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 40 TO 47. HIGHS 70 TO 78. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 43 TO 50. HIGHS 73 TO 82.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 47 TO 53. HIGHS 74 TO 83. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ700-041115-
CENTRAL MOUNTAINS OF OREGON-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING, THEN A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....28-40.
* MAX HUMIDITY........85-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (105-177) DECREASING TO LOW (28-52) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS
AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....59-65...EXCEPT 53-58 RIDGES.
* MIN HUMIDITY........38-51 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (62-108) INCREASING TO MODERATE (266-492)
IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....30-42.
* MAX HUMIDITY........85-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (71-145) DECREASING TO LOW (25-35) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS.
* MAX TEMPERATURE.....63-68...EXCEPT 56-61 RIDGES.
* MIN HUMIDITY........32-47 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-31) INCREASING TO MODERATE (232-394)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 33 TO 45. HIGHS 61 TO 67. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 33 TO 45. HIGHS 63 TO 69. WEST
WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 33 TO 45. HIGHS 70 TO 76. SOUTH
WINDS UP TO 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 36 TO 48. HIGHS 74 TO 79.
NORTHWEST WINDS UP TO 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 39 TO 50. HIGHS 75 TO 81.
SOUTHWEST WINDS 1 TO 6 MPH.
ORZ703-041115-
WARM SPRINGS RESERVATION-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN A CHANCE OF SHOWERS
AFTER MIDNIGHT.
* MIN TEMPERATURE.....40-45.
* MAX HUMIDITY........81-93 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (136-198) DECREASING TO LOW (25-67) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....60-68...EXCEPT 49-59 RIDGES.
* MIN HUMIDITY........44-57 PERCENT...EXCEPT 60-75 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (40-78) INCREASING TO LOW TO MODERATE
(166-258) IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....40-46.
* MAX HUMIDITY........82-94 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (71-111) DECREASING TO LOW (25-28) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS.
* MAX TEMPERATURE.....63-70...EXCEPT 52-61 RIDGES.
* MIN HUMIDITY........41-54 PERCENT...EXCEPT 57-72 PERCENT RIDGES.
* 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH SHIFTING TO THE SOUTH IN
THE AFTERNOON.
* VENTILATION INDEX...LOW (25) INCREASING TO LOW TO MODERATE
(198-254) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 44 TO 49. HIGHS 61 TO 70. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 45 TO 50.
HIGHS 62 TO 73. WEST WINDS 3 TO 8 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 68 TO 77. WEST
WINDS 2 TO 7 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 72 TO 81. NORTH
WINDS UP TO 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 73 TO 83.
SOUTHWEST WINDS UP TO 5 MPH.
ORZ704-041115-
NORTHERN DESCHUTES NATIONAL FOREST-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY IN THE EVENING,
THEN A CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....32-40.
* MAX HUMIDITY........85-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...MODERATE (213-267) DECREASING TO LOW (36-86)
AFTER MIDNIGHT.
FRIDAY
* 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.....58-64...EXCEPT 45-55 RIDGES.
* MIN HUMIDITY........50-64 PERCENT...EXCEPT 65-80 PERCENT RIDGES.
* 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.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (48-92) INCREASING TO LOW TO MODERATE
(193-243) IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY IN THE EVENING,
THEN A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....32-41.
* MAX HUMIDITY........84-99 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (62-102) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS
IN THE AFTERNOON.
* MAX TEMPERATURE.....62-67...EXCEPT 51-59 RIDGES.
* MIN HUMIDITY........43-54 PERCENT...EXCEPT 55-70 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-26) INCREASING TO MODERATE (241-301)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 36 TO 45. HIGHS 55 TO 66. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
SHOWERS LIKELY. MOSTLY CLOUDY. LOWS 37 TO 45. HIGHS
57 TO 70. WEST WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 36 TO 44. HIGHS 65 TO 76. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 40 TO 48. HIGHS 68 TO 79.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 42 TO 50. HIGHS 68 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ705-041115-
SOUTHERN DESCHUTES NATIONAL FOREST-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF SNOW SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....25-35.
* MAX HUMIDITY........87-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH BECOMING
SOUTHWEST 1 TO 5 MPH AFTER MIDNIGHT.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
* VENTILATION INDEX...MODERATE (212-272) DECREASING TO LOW (54-112)
AFTER MIDNIGHT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF RAIN AND SNOW
SHOWERS IN THE MORNING, THEN SHOWERS LIKELY AND A SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....56-61...EXCEPT 45-54 RIDGES.
* MIN HUMIDITY........50-65 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS 1 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (114-160) INCREASING TO MODERATE
(299-443) IN THE AFTERNOON.
FRIDAY 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.....26-36.
* MAX HUMIDITY........91-100 PERCENT...EXCEPT 79-94 PERCENT RIDGES.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (79-133) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE MORNING, THEN A CHANCE OF SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.....61-66...EXCEPT 51-59 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.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-31) INCREASING TO MODERATE (319-395)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 30 TO 40. HIGHS 55 TO 63. TERRAIN DRIVEN
WINDS LESS THAN 5 MPH.
LABOR DAY
SHOWERS LIKELY. MOSTLY CLOUDY. LOWS 30 TO 40. HIGHS
59 TO 67. WEST WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 30 TO 40. HIGHS 67 TO 75. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 33 TO 44. HIGHS 70 TO 78.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 36 TO 47. HIGHS 70 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ697-041115-
CENTRAL BLUE MOUNTAINS-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN A SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT.
* MIN TEMPERATURE.....29-38.
* MAX HUMIDITY........90-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................80 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (75-113) DECREASING TO LOW (43-93) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.....56-61...EXCEPT 51-58 RIDGES.
* MIN HUMIDITY........42-51 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (84-106) INCREASING TO MODERATE TO HIGH
(467-537) IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....31-40.
* MAX HUMIDITY........82-97 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (106-152) DECREASING TO LOW (25-32) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS.
* MAX TEMPERATURE.....60-65...EXCEPT 55-62 RIDGES.
* MIN HUMIDITY........35-42 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHWEST 1
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING SOUTHWEST 1
TO 5 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-28) INCREASING TO HIGH (515-697) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. PARTLY CLOUDY. LOWS 34 TO 42. HIGHS 60 TO 66.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
LABOR DAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 35 TO 43. HIGHS 56 TO 63. WEST
WINDS 1 TO 6 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 33 TO 42. HIGHS 64 TO 72. SOUTH
WINDS UP TO 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 37 TO 45. HIGHS 68 TO 76.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 41 TO 48. HIGHS 69 TO 76.
SOUTHWEST WINDS UP TO 5 MPH.
ORZ698-041115-
SOUTHERN BLUE MOUNTAINS-
256 PM PDT THU SEP 3 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN A SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT.
* MIN TEMPERATURE.....29-38.
* MAX HUMIDITY........90-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................80 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...LOW (112-168) DECREASING TO LOW (47-89) AFTER
MIDNIGHT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE AFTERNOON.
* MAX TEMPERATURE.....56-61.
* MIN HUMIDITY........43-48 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (66-90) INCREASING TO MODERATE (403-493)
IN THE AFTERNOON.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS.
* MIN TEMPERATURE.....31-40.
* MAX HUMIDITY........81-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (72-142) DECREASING TO LOW (25-39) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS.
* MAX TEMPERATURE.....61-66...EXCEPT 56-61 RIDGES.
* MIN HUMIDITY........33-38 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHWEST 2
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-26) INCREASING TO MODERATE TO HIGH
(390-554) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. MOSTLY CLOUDY. LOWS 34 TO 43. HIGHS 62 TO 68.
NORTHEAST WINDS UP TO 5 MPH.
LABOR DAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS. LOWS 35 TO 43. HIGHS 60 TO 65. WEST
WINDS 2 TO 7 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 33 TO 41. HIGHS 67 TO 72. EAST
WINDS 1 TO 6 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 37 TO 44. HIGHS 72 TO 77. WEST
WINDS 1 TO 6 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 40 TO 48. HIGHS 73 TO 78.
SOUTHWEST WINDS 1 TO 6 MPH.
.8-14 DAY OUTLOOK FOR FRIDAY SEPTEMBER 11 THROUGH THURSDAY SEPTEMBER 17...
A GREATER CHANCE OF ABOVE NORMAL PRECIPITATION AND NEAR NORMAL
TEMPERATURES.
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