733
FNUS56 KPDT 042135
FWFPDT
FIRE WEATHER PLANNING FORECAST FOR NE OREGON AND SE WASHINGTON
NATIONAL WEATHER SERVICE PENDLETON OR
235 PM PDT FRI SEP 4 2026
DISCUSSION
LOW FIRE WEATHER CONCERNS THE NEXT SEVERAL DAYS DUE
TO LOWER THAN AVERAGE TEMPERATURES, UNSETTLED WET WEATHER, AND
ELEVATED AFTERNOON HUMIDITY. WHILE ISOLATED THUNDERSTORMS ARE
POSSIBLE IN THE MOUNTAINS, LIGHTNING WILL BE LARGELY INFREQUENT
WITH ANY STORM. A WARMING TREND WILL BEGIN MONDAY WITH NEAR TO
ABOVE AVERAGE TEMPS AND DRY CONDITIONS RETURNING BY MIDWEEK.
***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. ***
WAZ695-051130-
EAST WASHINGTON SOUTH CENTRAL CASCADE MOUNTAINS-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE EVENING.
* MIN TEMPERATURE.....38-44.
* MAX HUMIDITY........73-88 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT EXCELLENT 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.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-53) 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.....59-68...EXCEPT 50-60 RIDGES.
* MIN HUMIDITY........47-60 PERCENT...EXCEPT 57-72 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTH UP TO
5 MPH IN THE AFTERNOON.
* 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.....EAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-51) INCREASING TO MODERATE (201-325)
IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....39-45.
* MAX HUMIDITY........74-89 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT EXCELLENT 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.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-62) DECREASING TO LOW (25-28) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE MORNING, THEN A CHANCE OF SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.....62-71...EXCEPT 53-63 RIDGES.
* MIN HUMIDITY........42-55 PERCENT...EXCEPT 53-68 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....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....EAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-29) INCREASING TO LOW TO MODERATE
(174-278) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 42 TO 49.
HIGHS 55 TO 69. NORTHWEST WINDS 4 TO 9 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 41 TO 48. HIGHS 61 TO 74. WEST
WINDS 4 TO 9 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 46 TO 51. HIGHS 67 TO 79.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 49 TO 54. HIGHS 65 TO 78. WEST
WINDS 1 TO 6 MPH.
FRIDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 47 TO
53. HIGHS 58 TO 71. WEST WINDS 2 TO 7 MPH.
WAZ690-051130-
KITTITAS VALLEY-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....45-51.
* MAX HUMIDITY........62-77 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (40-74) DECREASING TO LOW (25-33) 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.....66-72...EXCEPT 57-66 RIDGES.
* MIN HUMIDITY........40-50 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHEAST 1
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH SHIFTING TO THE SOUTHEAST
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (41-65) INCREASING TO MODERATE (283-367)
IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....46-52.
* MAX HUMIDITY........65-80 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (71-121) DECREASING TO LOW (25-31) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS.
* MAX TEMPERATURE.....68-75...EXCEPT 59-68 RIDGES.
* MIN HUMIDITY........39-47 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS UP TO 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS UP TO 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-36) INCREASING TO MODERATE (225-311)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 49 TO 55.
HIGHS 70 TO 78. NORTHWEST WINDS 7 TO 13 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 48 TO 53. HIGHS 71 TO 79.
NORTHWEST WINDS 6 TO 12 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 51 TO 57. HIGHS 76 TO 83.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 54 TO 60. HIGHS 77 TO 84. WEST
WINDS 1 TO 6 MPH.
FRIDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
53 TO 58. HIGHS 71 TO 79. WEST WINDS 1 TO 6 MPH.
WAZ694-051130-
YAKAMA ALPINE DISTRICT-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....38-46.
* MAX HUMIDITY........73-88 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.....SOUTHWEST AROUND 5 MPH SHIFTING TO THE
NORTHWEST AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (33-75) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
SATURDAY
* 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.....62-69...EXCEPT 51-64 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.................20 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH SHIFTING TO THE SOUTHEAST
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (25-40) INCREASING TO LOW TO MODERATE
(157-245) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE EVENING. A CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....39-47.
* MAX HUMIDITY........73-88 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.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-48) DECREASING TO LOW (25-27) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MAX TEMPERATURE.....64-71...EXCEPT 54-66 RIDGES.
* MIN HUMIDITY........47-62 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.......5000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-27) INCREASING TO LOW TO MODERATE
(171-261) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 41 TO 49.
HIGHS 61 TO 75. WEST WINDS 3 TO 8 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 40 TO 47. HIGHS 65 TO 77. WEST
WINDS 3 TO 8 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 45 TO 53. HIGHS 69 TO 81.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 48 TO 56. HIGHS 68 TO 81. WEST
WINDS 1 TO 6 MPH.
FRIDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 46 TO
54. HIGHS 62 TO 75. WEST WINDS 2 TO 7 MPH.
ORZ691-WAZ691-051130-
LOWER COLUMBIA BASIN OF OREGON-LOWER COLUMBIA BASIN OF WASHINGTON-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
CHANCE OF SHOWERS IN THE EVENING. A SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........74-89 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...EAST 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.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH SHIFTING TO THE WEST
AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (49-123) DECREASING TO LOW (25-34) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....66-74...EXCEPT 63-69 RIDGES.
* MIN HUMIDITY........40-52 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.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (31-57) INCREASING TO LOW TO MODERATE
(124-228) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....46-51.
* 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.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (42-102) DECREASING TO LOW (25-33) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MAX TEMPERATURE.....66-75.
* MIN HUMIDITY........41-56 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.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-32) INCREASING TO LOW TO MODERATE
(128-242) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 48 TO 53.
HIGHS 70 TO 79. SOUTHWEST WINDS 6 TO 12 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 74 TO 81. SOUTHWEST
WINDS 6 TO 12 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 50 TO 55. HIGHS 78 TO 85.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 53 TO 58. HIGHS 79 TO 86.
SOUTHWEST WINDS 1 TO 6 MPH.
FRIDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
53 TO 58. HIGHS 74 TO 81. SOUTHWEST WINDS 4 TO 9 MPH.
ORZ692-WAZ692-051130-
NORTHERN BLUE MOUNTAINS OF OREGON-BLUE MOUNTAINS OF WASHINGTON-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....37-46.
* MAX HUMIDITY........74-89 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.....SOUTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (71-109) DECREASING TO LOW (25-27) AFTER
MIDNIGHT.
SATURDAY
* 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.....62-69...EXCEPT 56-62 RIDGES.
* MIN HUMIDITY........47-62 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.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-43) INCREASING TO LOW TO MODERATE
(90-264) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....39-48.
* 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.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (31-61) DECREASING TO LOW (25-28) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....62-70...EXCEPT 57-62 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....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-26) INCREASING TO LOW TO MODERATE
(187-271) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. LOWS
41 TO 49. HIGHS 57 TO 68. WEST WINDS 3 TO 8 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 39 TO 48. HIGHS 66 TO 76. SOUTH
WINDS 2 TO 7 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 43 TO 52. HIGHS 70 TO 80.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
47 TO 56. HIGHS 72 TO 82. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
FRIDAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 47 TO 56.
HIGHS 66 TO 76. SOUTHWEST WINDS 1 TO 6 MPH.
ORZ693-WAZ693-051130-
CANYON GRASSLANDS OF WALLOWA COUNTY-
SOUTHEAST WASHINGTON GRANDE RONDE VALLEY-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE EVENING.
* MIN TEMPERATURE.....35-47.
* MAX HUMIDITY........75-90 PERCENT...EXCEPT 69-79 PERCENT RIDGES.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST 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.....NORTHEAST AROUND 5 MPH SHIFTING TO THE
SOUTHWEST AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (35-99) DECREASING TO LOW (25) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....65-73...EXCEPT 60-66 RIDGES.
* MIN HUMIDITY........36-45 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING SOUTH 1 TO 6
MPH IN THE AFTERNOON.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-38) INCREASING TO LOW TO HIGH
(183-569) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....38-50.
* 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.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (52-96) DECREASING TO LOW (25) AFTER
MIDNIGHT.
SUNDAY
* 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.....65-73...EXCEPT 60-66 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....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....EAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25) INCREASING TO MODERATE (206-360) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. LOWS
39 TO 50. HIGHS 58 TO 67. WEST WINDS 1 TO 5 MPH.
TUESDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 36 TO
48. HIGHS 67 TO 76. SOUTH WINDS 3 TO 8 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 40 TO 52. HIGHS 73 TO 81.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
44 TO 56. HIGHS 74 TO 83. SOUTH WINDS 1 TO 6 MPH.
FRIDAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 45 TO 57.
HIGHS 68 TO 77. SOUTHWEST WINDS 2 TO 7 MPH.
ORZ701-051130-
EASTERN COLUMBIA RIVER GORGE OF OREGON-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....44-50.
* 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.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (51-99) DECREASING TO LOW (25-28) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....67-72.
* MIN HUMIDITY........45-60 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH...EXCEPT UPSLOPE
LESS THAN 5 MPH IN THE EASTERN COLUMBIA RIVER GORGE.
* 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.....WEST AROUND 5 MPH SHIFTING TO THE SOUTHEAST
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (28-44) INCREASING TO LOW (59-149) IN THE
AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE EVENING, THEN A CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....45-51.
* 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.......500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (60-108) DECREASING TO LOW (25-28) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MAX TEMPERATURE.....67-72.
* MIN HUMIDITY........50-64 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.......4000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25) INCREASING TO LOW TO MODERATE
(141-205) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS
46 TO 53. HIGHS 69 TO 74. WEST WINDS 6 TO 12 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 45 TO 51. HIGHS 74 TO 79. WEST
WINDS 4 TO 9 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 49 TO 55. HIGHS 78 TO 83.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 52 TO 57. HIGHS 78 TO 83. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
FRIDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 51 TO
56. HIGHS 71 TO 76. WEST WINDS 2 TO 7 MPH.
ORZ702-051130-
EAST SLOPES OF THE MT. HOOD NATIONAL FOREST-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....39-47.
* 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.................20 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (58-78) DECREASING TO LOW (25-29) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....62-69...EXCEPT 56-65 RIDGES.
* MIN HUMIDITY........43-58 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.................30 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH SHIFTING TO THE
SOUTHEAST IN THE AFTERNOON.
* VENTILATION INDEX...LOW (25-38) INCREASING TO LOW (99-183) IN THE
AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....40-48.
* 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.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (39-83) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY IN THE AFTERNOON.
* MAX TEMPERATURE.....62-70...EXCEPT 57-66 RIDGES.
* MIN HUMIDITY........49-62 PERCENT...EXCEPT 58-73 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.......3500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-26) INCREASING TO LOW (150-184) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 42 TO 49.
HIGHS 59 TO 73. WEST WINDS 3 TO 8 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 41 TO 47. HIGHS 65 TO 76. WEST
WINDS UP TO 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 48 TO 54. HIGHS 69 TO 80.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 51 TO 57. HIGHS 69 TO 81. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
FRIDAY
A CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 48 TO 55.
HIGHS 62 TO 74. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
ORZ695-051130-
EAGLE CAP WILDERNESS-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....38-44...EXCEPT 33-39 RIDGES.
* MAX HUMIDITY........71-86 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTH 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.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (50-112) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....60-70...EXCEPT 50-61 RIDGES.
* MIN HUMIDITY........40-52 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHWEST 1
TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH INCREASING TO AROUND 15
MPH IN THE AFTERNOON.
* VENTILATION INDEX...LOW (28-70) INCREASING TO MODERATE TO HIGH
(385-667) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....38-45.
* MAX HUMIDITY........68-83 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTHWEST WINDS 2 TO 5 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (35-95) DECREASING TO LOW (25-31) AFTER
MIDNIGHT.
SUNDAY
* 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.....61-71...EXCEPT 52-62 RIDGES.
* MIN HUMIDITY........43-56 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING SOUTHEAST 2
TO 5 MPH IN THE AFTERNOON.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH INCREASING TO SOUTH
AROUND 15 MPH IN THE AFTERNOON.
* VENTILATION INDEX...LOW (25-31) INCREASING TO MODERATE TO HIGH
(280-676) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. LOWS
37 TO 46. HIGHS 48 TO 62. WEST WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
36 TO 44. HIGHS 57 TO 71. SOUTH WINDS 1 TO 6 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 40 TO 48. HIGHS 62 TO 76. SOUTH
WINDS 1 TO 5 MPH.
THURSDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 45 TO
52. HIGHS 63 TO 77. SOUTH WINDS 2 TO 7 MPH.
FRIDAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 45 TO 53.
HIGHS 58 TO 72. SOUTHWEST WINDS 2 TO 7 MPH.
ORZ694-051130-
GRANDE RONDE VALLEY OF OREGON-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE EVENING.
* MIN TEMPERATURE.....36-41.
* MAX HUMIDITY........81-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 1 TO 6 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 1 TO 6 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH SHIFTING TO THE NORTH
AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (40-78) DECREASING TO LOW (25) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....67-73.
* MIN HUMIDITY........41-46 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTH 1 TO
5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING SOUTH 2 TO 5
MPH IN THE AFTERNOON.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....30 PERCENT (CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-26) INCREASING TO MODERATE (219-401)
IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....37-43.
* 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.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (44-72) DECREASING TO LOW (25-34) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....69-74.
* 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.................20 PERCENT.
* CHC OF LIGHTNING....30 PERCENT (CHANCE).
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-36) INCREASING TO LOW TO MODERATE
(55-209) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. LOWS
39 TO 45. HIGHS 64 TO 69. WEST WINDS 2 TO 7 MPH.
TUESDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 37 TO
42. HIGHS 71 TO 77. SOUTH WINDS 1 TO 6 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 41 TO 46. HIGHS 76 TO 82.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
45 TO 50. HIGHS 78 TO 84. SOUTH WINDS UP TO 5 MPH.
FRIDAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 46 TO 51.
HIGHS 73 TO 78. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
ORZ699-051130-
WESTERN FORESTED BLUE MOUNTAINS-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....35-42.
* 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.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (80-124) DECREASING TO LOW (25) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A CHANCE
OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....61-67...EXCEPT 55-61 RIDGES.
* MIN HUMIDITY........40-55 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....30 PERCENT (CHANCE).
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-54) INCREASING TO LOW TO MODERATE
(188-478) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....37-43.
* MAX HUMIDITY........75-90 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.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (31-71) DECREASING TO LOW (25-30) AFTER
MIDNIGHT.
SUNDAY
* 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.....62-68...EXCEPT 56-63 RIDGES.
* MIN HUMIDITY........44-59 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................50 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-35) INCREASING TO LOW TO MODERATE
(180-422) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
MOSTLY CLOUDY WITH SHOWERS LIKELY. LOWS 38 TO 45.
HIGHS 56 TO 65. WEST WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 37 TO 44. HIGHS 65 TO 74. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 41 TO 48. HIGHS 70 TO 79.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
45 TO 53. HIGHS 71 TO 80. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
FRIDAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 46 TO 53.
HIGHS 66 TO 74. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
ORZ696-051130-
JOHN DAY VALLEY-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....37-45.
* MAX HUMIDITY........74-88 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....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH SHIFTING TO THE SOUTHWEST
AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (51-123) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....62-70...EXCEPT 57-62 RIDGES.
* MIN HUMIDITY........34-47 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.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-33) INCREASING TO LOW TO MODERATE
(194-428) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS.
* MIN TEMPERATURE.....40-47.
* MAX HUMIDITY........70-84 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.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (55-95) DECREASING TO LOW (25-32) AFTER
MIDNIGHT.
SUNDAY
* 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.....61-70...EXCEPT 56-62 RIDGES.
* MIN HUMIDITY........44-57 PERCENT.
* 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.......6500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-30) INCREASING TO LOW TO MODERATE
(130-290) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
MOSTLY CLOUDY WITH SHOWERS LIKELY. LOWS 40 TO 48.
HIGHS 62 TO 70. WEST WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 40 TO 46. HIGHS 71 TO 79.
SOUTHEAST WINDS UP TO 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 44 TO 51. HIGHS 75 TO 83.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
48 TO 54. HIGHS 75 TO 84. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
FRIDAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 48 TO 55.
HIGHS 70 TO 79. SOUTHWEST WINDS 1 TO 5 MPH.
ORZ700-051130-
CENTRAL MOUNTAINS OF OREGON-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN A SLIGHT
CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....30-42.
* MAX HUMIDITY........85-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 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....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (71-149) DECREASING TO LOW (25-31) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS. A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....63-68...EXCEPT 55-62 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.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (26-40) INCREASING TO MODERATE TO HIGH
(242-532) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE EVENING. A CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....33-45.
* 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.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (47-135) DECREASING TO LOW (25-63) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....60-66...EXCEPT 54-60 RIDGES.
* MIN HUMIDITY........46-61 PERCENT.
* 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.......4500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-56) INCREASING TO LOW TO MODERATE
(105-211) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 32 TO 45.
HIGHS 63 TO 71. WEST WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 33 TO 44. HIGHS 71 TO 77.
SOUTHEAST WINDS UP TO 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 38 TO 49. HIGHS 75 TO 80. EAST
WINDS 1 TO 6 MPH.
THURSDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
41 TO 52. HIGHS 75 TO 82. SOUTH WINDS 1 TO 6 MPH.
FRIDAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 41 TO 52.
HIGHS 70 TO 76. SOUTHWEST WINDS 2 TO 7 MPH.
ORZ703-051130-
WARM SPRINGS RESERVATION-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING, THEN A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....41-46.
* 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.................40 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (62-88) DECREASING TO LOW (25-26) 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.....63-70...EXCEPT 52-61 RIDGES.
* MIN HUMIDITY........40-55 PERCENT...EXCEPT 59-74 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.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-30) INCREASING TO LOW (132-186) IN
THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....43-48.
* MAX HUMIDITY........77-89 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.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (62-124) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
SUNDAY
* 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.....63-69...EXCEPT 52-61 RIDGES.
* MIN HUMIDITY........50-63 PERCENT...EXCEPT 64-79 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.......3500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-29) INCREASING TO LOW (117-147) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 44 TO 49.
HIGHS 64 TO 75. WEST WINDS 3 TO 8 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 43 TO 48. HIGHS 69 TO 79. WEST
WINDS 3 TO 8 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 49 TO 54. HIGHS 73 TO 82.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 51 TO 56. HIGHS 73 TO 84.
SOUTHWEST WINDS UP TO 5 MPH.
FRIDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 50 TO
55. HIGHS 66 TO 78. WEST WINDS 2 TO 7 MPH.
ORZ704-051130-
NORTHERN DESCHUTES NATIONAL FOREST-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. A SLIGHT CHANCE OF SHOWERS.
* MIN TEMPERATURE.....33-41.
* 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.................40 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (58-70) DECREASING TO LOW (25-27) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....62-68...EXCEPT 51-59 RIDGES.
* MIN HUMIDITY........48-58 PERCENT...EXCEPT 61-76 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.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-45) INCREASING TO LOW TO MODERATE
(144-208) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....35-43.
* 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.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...LOW (55-93) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........CLOUDY. A CHANCE OF SHOWERS IN THE MORNING,
THEN SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....60-67...EXCEPT 49-58 RIDGES.
* MIN HUMIDITY........54-68 PERCENT...EXCEPT 69-84 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................50 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......4000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-30) INCREASING TO LOW (121-151) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 36 TO 44.
HIGHS 58 TO 71. WEST WINDS 2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 35 TO 43. HIGHS 66 TO 76. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 41 TO 49. HIGHS 69 TO 80.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
43 TO 52. HIGHS 68 TO 80. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
FRIDAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 43 TO 51.
HIGHS 61 TO 73. WEST WINDS 2 TO 7 MPH.
ORZ705-051130-
SOUTHERN DESCHUTES NATIONAL FOREST-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.....26-36.
* MAX HUMIDITY........88-100 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....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (70-144) DECREASING TO LOW (25-29) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS.
* MAX TEMPERATURE.....61-66...EXCEPT 51-59 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.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (40-68) INCREASING TO MODERATE TO HIGH
(352-572) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN
THE EVENING, THEN A CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....29-39.
* 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.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (92-158) DECREASING TO LOW (25-45) AFTER
MIDNIGHT.
SUNDAY
* SKY/WEATHER.........CLOUDY. A CHANCE OF SHOWERS IN THE MORNING,
THEN SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....58-63...EXCEPT 48-56 RIDGES.
* MIN HUMIDITY........59-74 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................80 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-56) INCREASING TO LOW (86-190) IN THE
AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
SHOWERS LIKELY. MOSTLY CLOUDY. LOWS 28 TO 39. HIGHS
60 TO 69. 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 34 TO 45. HIGHS 70 TO 78.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 37 TO
49. HIGHS 69 TO 78. SOUTHWEST WINDS UP TO 5 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 37 TO 47.
HIGHS 63 TO 73. SOUTHWEST WINDS 1 TO 6 MPH.
ORZ697-051130-
CENTRAL BLUE MOUNTAINS-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....31-40.
* MAX HUMIDITY........80-94 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....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH SHIFTING TO THE WEST AFTER
MIDNIGHT.
* VENTILATION INDEX...LOW (88-168) DECREASING TO LOW (25-26) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS. A
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....61-66...EXCEPT 55-62 RIDGES.
* MIN HUMIDITY........35-42 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHWEST 2
TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING SOUTHWEST 2
TO 6 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH INCREASING TO AROUND 15
MPH IN THE AFTERNOON.
* VENTILATION INDEX...LOW (34-60) INCREASING TO HIGH TO VERY HIGH
(553-739) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* MIN TEMPERATURE.....34-42.
* MAX HUMIDITY........70-82 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 10 MPH SHIFTING TO THE NORTHEAST
AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (53-115) DECREASING TO LOW (25-32) AFTER
MIDNIGHT.
SUNDAY
* 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.....59-65.
* MIN HUMIDITY........43-51 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING WEST 2 TO 5
MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING SOUTHWEST 2
TO 5 MPH IN THE AFTERNOON.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (25-28) INCREASING TO MODERATE TO VERY
HIGH (333-717) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
MOSTLY CLOUDY WITH SHOWERS LIKELY. LOWS 34 TO 42.
HIGHS 56 TO 63. WEST WINDS 2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 33 TO 41. HIGHS 64 TO 72.
SOUTHEAST WINDS UP TO 5 MPH.
WEDNESDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS
38 TO 46. HIGHS 69 TO 76. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
THURSDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
42 TO 49. HIGHS 70 TO 77. SOUTHWEST WINDS 1 TO 6 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 43 TO 51.
HIGHS 65 TO 72. SOUTHWEST WINDS 1 TO 6 MPH.
ORZ698-051130-
SOUTHERN BLUE MOUNTAINS-
235 PM PDT FRI SEP 4 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. A SLIGHT CHANCE OF SHOWERS.
* MIN TEMPERATURE.....31-40.
* 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....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH SHIFTING TO THE NORTH
AFTER MIDNIGHT.
* VENTILATION INDEX...LOW (79-149) DECREASING TO LOW (25-28) AFTER
MIDNIGHT.
SATURDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....61-66.
* MIN HUMIDITY........32-38 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTH 2 TO
5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING SOUTH 2 TO 5
MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH INCREASING TO SOUTH
AROUND 15 MPH IN THE AFTERNOON.
* VENTILATION INDEX...LOW (25-41) INCREASING TO HIGH (553-693) IN
THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
* MIN TEMPERATURE.....31-39...EXCEPT 36-41 RIDGES.
* MAX HUMIDITY........68-83 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (32-78) DECREASING TO LOW (28-42) AFTER
MIDNIGHT.
SUNDAY
* 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.....61-67.
* MIN HUMIDITY........41-48 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.....NORTHEAST AROUND 5 MPH INCREASING TO
SOUTHWEST AROUND 15 MPH IN THE AFTERNOON.
* VENTILATION INDEX...LOW (25-48) INCREASING TO MODERATE TO HIGH
(404-630) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
LABOR DAY
MOSTLY CLOUDY WITH SHOWERS LIKELY. LOWS 34 TO 42.
HIGHS 60 TO 65. WEST WINDS 2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 33 TO 40. HIGHS 67 TO 72. EAST
WINDS 1 TO 6 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 38 TO 45. HIGHS 72 TO 77. EAST
WINDS 1 TO 6 MPH.
THURSDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
41 TO 49. HIGHS 73 TO 78. SOUTHWEST WINDS 1 TO 6 MPH.
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS 42 TO 49.
HIGHS 69 TO 74. SOUTHWEST WINDS 2 TO 7 MPH.
.8-14 DAY OUTLOOK FOR SATURDAY SEPTEMBER 12 THROUGH FRIDAY SEPTEMBER 18...
A GREATER CHANCE OF BELOW NORMAL TEMPERATURES AND ABOVE NORMAL
PRECIPITATION.
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