684
FNUS56 KPDT 152128
FWFPDT
FIRE WEATHER PLANNING FORECAST FOR NE OREGON AND SE WASHINGTON
NATIONAL WEATHER SERVICE PENDLETON OR
228 PM PDT TUE SEP 15 2026
DISCUSSION
LIMITED CONCERNS, EXCEPT FOR LOW THUNDER CHANCES
ON THURSDAY IN THE EASTERN MOUNTAINS. A BRIEF WINDOW OF LIGHT
RAIN TONIGHT ACROSS THE CASCADES SPILLING INTO CENTRAL OR BEFORE
DRY CONDITIONS PREVAIL TOMORROW. WETTING RAIN HIGHLY LIKELY IN THE
EASTERN MOUNTAINS THURSDAY AND OVERNIGHT, INCLUDING A RISK OF
ISOLATED STORMS WITH INFREQUENT LIGHTNING (20-30%). WARMING AND
DRYING TREND PERSISTING LATE THIS WEEK THROUGH THE WEEKEND.
***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. ***
WAZ695-161130-
EAST WASHINGTON SOUTH CENTRAL CASCADE MOUNTAINS-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING.
* MIN TEMPERATURE.....38-44.
* 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.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (44-62) DECREASING TO LOW (25-38) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....64-73...EXCEPT 56-64 RIDGES.
* MIN HUMIDITY........37-52 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...EAST WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....EAST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (43-87) INCREASING TO MODERATE (359-447)
IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....42-48.
* MAX HUMIDITY........58-71 PERCENT.
* HUMIDITY RECOVERY...MODERATE.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH BECOMING
NORTHEAST UP TO 5 MPH AFTER MIDNIGHT.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (68-100) DECREASING TO LOW (25-30) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....71-79...EXCEPT 64-71 RIDGES.
* MIN HUMIDITY........28-37 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-28) INCREASING TO LOW (44-146) IN THE
AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 43 TO 50. HIGHS 63 TO 75. WEST WINDS
2 TO 7 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 44 TO 50. HIGHS 65 TO 76. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 66 TO 78. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 62 TO 74. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 42 TO 49. HIGHS 56 TO 68. WEST
WINDS 2 TO 7 MPH.
WAZ690-161130-
KITTITAS VALLEY-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....44-50.
* MAX HUMIDITY........81-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (58-114) DECREASING TO LOW (32-44) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....68-74...EXCEPT 59-68 RIDGES.
* MIN HUMIDITY........41-48 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (58-110) INCREASING TO MODERATE TO HIGH
(438-634) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....47-54.
* MAX HUMIDITY........56-71 PERCENT.
* HUMIDITY RECOVERY...MODERATE.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS UP TO 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 5 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (92-160) DECREASING TO LOW (31-39) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....73-79...EXCEPT 65-72 RIDGES.
* MIN HUMIDITY........33-40 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS UP TO 5 MPH IN THE MORNING
BECOMING UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 1 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......4000 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-34) INCREASING TO LOW (94-188) IN THE
AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 72 TO 78. WEST WINDS
1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 72 TO 78. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 73 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
PARTLY CLOUDY. LOWS 51 TO 56. HIGHS 72 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 49 TO 54. HIGHS 66 TO 74.
NORTHWEST WINDS 2 TO 7 MPH.
WAZ694-161130-
YAKAMA ALPINE DISTRICT-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....40-48.
* MAX HUMIDITY........85-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH BECOMING
NORTH 1 TO 5 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH BECOMING
NORTHEAST 2 TO 7 MPH AFTER MIDNIGHT.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (53-77) DECREASING TO LOW (31-47) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....66-74...EXCEPT 57-66 RIDGES.
* MIN HUMIDITY........41-53 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (85-139) INCREASING TO MODERATE TO HIGH
(448-602) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....44-51.
* MAX HUMIDITY........58-71 PERCENT.
* HUMIDITY RECOVERY...MODERATE...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (122-162) DECREASING TO LOW (28-42) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....73-80...EXCEPT 65-74 RIDGES.
* MIN HUMIDITY........31-38 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-31) INCREASING TO LOW (38-186) IN THE
AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 45 TO 52. HIGHS 67 TO 78. WEST WINDS
1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 44 TO 52. HIGHS 69 TO 80. WEST
WINDS UP TO 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 47 TO 54. HIGHS 70 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
PARTLY CLOUDY. LOWS 46 TO 54. HIGHS 67 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 43 TO 50. HIGHS 60 TO 72. WEST
WINDS 1 TO 6 MPH.
ORZ691-WAZ691-161130-
LOWER COLUMBIA BASIN OF OREGON-LOWER COLUMBIA BASIN OF WASHINGTON-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MIN TEMPERATURE.....46-51.
* MAX HUMIDITY........85-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 1 TO 6 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (76-140) DECREASING TO LOW (25-47) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....70-79...EXCEPT 66-73 RIDGES.
* MIN HUMIDITY........34-47 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 4 TO 10 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 10 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (38-94) INCREASING TO MODERATE TO HIGH
(382-632) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....48-53.
* MAX HUMIDITY........66-81 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (126-204) DECREASING TO LOW
(25-36) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.....72-79.
* MIN HUMIDITY........33-45 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 1 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-30) INCREASING TO LOW TO MODERATE
(109-203) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
A CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 50 TO 55.
HIGHS 75 TO 81. SOUTHWEST WINDS 2 TO 7 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 77 TO 82.
SOUTHWEST WINDS UP TO 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 78 TO 84. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 77 TO 83. WEST WINDS
UP TO 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 50 TO 55. HIGHS 70 TO 78. WEST
WINDS 2 TO 7 MPH.
ORZ692-WAZ692-161130-
NORTHERN BLUE MOUNTAINS OF OREGON-BLUE MOUNTAINS OF WASHINGTON-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MIN TEMPERATURE.....40-47.
* 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....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (63-91) DECREASING TO LOW (25-35) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....66-74...EXCEPT 62-67 RIDGES.
* MIN HUMIDITY........38-53 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTH 2 TO
5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING NORTHEAST 2
TO 5 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (32-62) INCREASING TO MODERATE (218-370)
IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....43-51.
* MAX HUMIDITY........69-84 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....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (61-99) DECREASING TO LOW (25-31) AFTER
MIDNIGHT.
THURSDAY
* 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.....65-73...EXCEPT 62-67 RIDGES.
* MIN HUMIDITY........47-61 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.......3000 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-26) INCREASING TO LOW (40-100) IN THE
AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. MOSTLY CLOUDY. LOWS 44 TO 52. HIGHS 66 TO 75.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 44 TO 52. HIGHS 69 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 46 TO 53. HIGHS 72 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 47 TO 55. HIGHS 71 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 45 TO 53. HIGHS 64 TO 73. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ693-WAZ693-161130-
CANYON GRASSLANDS OF WALLOWA COUNTY-
SOUTHEAST WASHINGTON GRANDE RONDE VALLEY-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MIN TEMPERATURE.....39-47.
* MAX HUMIDITY........77-92 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 1 TO 5 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (73-111) DECREASING TO LOW (25-31) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....68-77...EXCEPT 63-69 RIDGES.
* MIN HUMIDITY........34-42 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING NORTHEAST 2
TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (34-54) INCREASING TO MODERATE (265-365)
IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....43-51.
* MAX HUMIDITY........69-84 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 1 TO 5 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (72-98) DECREASING TO LOW (25) AFTER
MIDNIGHT.
THURSDAY
* 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.....70-79...EXCEPT 65-72 RIDGES.
* MIN HUMIDITY........41-52 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.......4500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25) INCREASING TO LOW (79-157) IN THE
AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 43 TO 53. HIGHS 68 TO 77. TERRAIN DRIVEN
WINDS LESS THAN 5 MPH.
SATURDAY
A SLIGHT CHANCE OF SHOWERS. MOSTLY CLEAR. LOWS 42 TO
51. HIGHS 71 TO 80. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 43 TO 53. HIGHS 74 TO 83. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 44 TO 55. HIGHS 75 TO 84. SOUTHWEST
WINDS UP TO 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 43 TO 52. HIGHS 67 TO 77. WEST
WINDS UP TO 5 MPH.
ORZ701-161130-
EASTERN COLUMBIA RIVER GORGE OF OREGON-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....45-50.
* 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.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...LOW (61-85) DECREASING TO LOW (25-28) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....71-77.
* MIN HUMIDITY........39-46 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 3 TO 8 MPH...EXCEPT EAST 3
TO 8 MPH IN THE EASTERN COLUMBIA RIVER GORGE.
* RIDGES/UPR SLOPES....EAST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (38-80) INCREASING TO MODERATE TO HIGH
(491-617) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....48-53.
* MAX HUMIDITY........66-79 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 1 TO 6 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....EAST WINDS UP TO 5 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (127-179) DECREASING TO LOW (25-29) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....76-81.
* MIN HUMIDITY........35-41 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE EAST
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (25) INCREASING TO LOW (111-195) IN THE
AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 75 TO 80. WEST WINDS
1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 79 TO 84. WEST
WINDS 1 TO 6 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 80 TO 85. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 76 TO 81. WEST WINDS
1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 47 TO 53. HIGHS 70 TO 75. WEST
WINDS 3 TO 8 MPH.
ORZ702-161130-
EAST SLOPES OF THE MT. HOOD NATIONAL FOREST-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
CHANCE OF SHOWERS IN THE EVENING.
* MIN TEMPERATURE.....41-47.
* 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....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (33-63) DECREASING TO LOW (28-50) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....65-72...EXCEPT 60-68 RIDGES.
* MIN HUMIDITY........42-55 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....EAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (91-131) INCREASING TO MODERATE TO HIGH
(425-555) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....46-52.
* MAX HUMIDITY........59-74 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.....EAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (145-189) DECREASING TO LOW (28-44) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....72-78...EXCEPT 67-75 RIDGES.
* MIN HUMIDITY........35-43 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH.
* VENTILATION INDEX...LOW (25-32) INCREASING TO LOW TO MODERATE
(183-241) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 45 TO 51. HIGHS 65 TO 79. WEST WINDS
1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 45 TO 51. HIGHS 70 TO 81. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 48 TO 55. HIGHS 71 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 48 TO 55. HIGHS 66 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 43 TO 50. HIGHS 59 TO 72. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ695-161130-
EAGLE CAP WILDERNESS-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY.
* MIN TEMPERATURE.....41-46...EXCEPT 35-42 RIDGES.
* MAX HUMIDITY........72-85 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (59-95) DECREASING TO LOW (25-61) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....67-78...EXCEPT 57-68 RIDGES.
* MIN HUMIDITY........31-44 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (50-112) INCREASING TO MODERATE (247-399)
IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT.
* MIN TEMPERATURE.....42-49.
* MAX HUMIDITY........67-81 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (72-130) DECREASING TO LOW (25-40) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....66-76...EXCEPT 57-67 RIDGES.
* MIN HUMIDITY........44-58 PERCENT...EXCEPT 55-64 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 6 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................50 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....EAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-27) INCREASING TO LOW TO MODERATE
(113-303) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 41 TO 49. HIGHS 58 TO 72. TERRAIN DRIVEN
WINDS LESS THAN 5 MPH.
SATURDAY
A SLIGHT CHANCE OF SHOWERS. MOSTLY CLEAR. LOWS 40 TO
48. HIGHS 61 TO 75. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 42 TO 50. HIGHS 64 TO 78. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 44 TO 52. HIGHS 64 TO 79. SOUTHWEST
WINDS 1 TO 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 42 TO 49. HIGHS 58 TO 72. WEST
WINDS 1 TO 6 MPH.
ORZ694-161130-
GRANDE RONDE VALLEY OF OREGON-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY.
* MIN TEMPERATURE.....41-46.
* MAX HUMIDITY........89-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 6 TO 12 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW (86-116) DECREASING TO LOW (45-67) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....75-80.
* MIN HUMIDITY........33-38 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 6 TO 12 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 6 TO 12 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 15 MPH.
* VENTILATION INDEX...LOW (79-127) INCREASING TO MODERATE TO HIGH
(341-505) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....42-47.
* MAX HUMIDITY........83-92 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 6 TO 12 MPH DECREASING TO 3
TO 6 MPH AFTER MIDNIGHT.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (108-136) DECREASING TO LOW (25-39) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS
IN THE AFTERNOON.
* MAX TEMPERATURE.....73-78.
* MIN HUMIDITY........49-54 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 3 TO 6 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................20 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......4000 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-28) INCREASING TO LOW (73-181) IN THE
AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS. MOSTLY
CLOUDY. LOWS 43 TO 48. HIGHS 73 TO 78. TERRAIN DRIVEN WINDS LESS
THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS 76 TO 81. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 78 TO 84. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 79 TO 84. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 72 TO 77.
NORTHWEST WINDS 2 TO 7 MPH.
ORZ699-161130-
WESTERN FORESTED BLUE MOUNTAINS-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY.
* MIN TEMPERATURE.....38-44.
* MAX HUMIDITY........84-99 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (98-172) DECREASING TO LOW (34-60) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....64-74...EXCEPT 59-69 RIDGES.
* MIN HUMIDITY........36-51 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (61-109) INCREASING TO MODERATE (348-484)
IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
* MIN TEMPERATURE.....41-46.
* MAX HUMIDITY........78-90 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 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.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (95-137) DECREASING TO LOW (25-34) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....65-71...EXCEPT 60-66 RIDGES.
* MIN HUMIDITY........48-61 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (25-28) INCREASING TO LOW TO MODERATE
(155-249) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. MOSTLY CLOUDY. LOWS 42 TO 48. HIGHS 65 TO 73.
TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS 69 TO 77. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 44 TO 50. HIGHS 72 TO 81. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 45 TO 52. HIGHS 71 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 43 TO 48. HIGHS 63 TO 72. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ696-161130-
JOHN DAY VALLEY-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS.
* MIN TEMPERATURE.....41-47.
* MAX HUMIDITY........84-99 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (160-250) DECREASING TO LOW
(32-66) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....66-75...EXCEPT 61-68 RIDGES.
* MIN HUMIDITY........33-46 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (55-101) INCREASING TO MODERATE (430-498)
IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....42-48.
* MAX HUMIDITY........76-88 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (121-157) DECREASING TO LOW (25-29) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS
IN THE AFTERNOON.
* MAX TEMPERATURE.....65-73...EXCEPT 61-66 RIDGES.
* MIN HUMIDITY........43-52 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.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25) INCREASING TO LOW TO MODERATE
(143-233) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
A CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 44 TO 50.
HIGHS 69 TO 78. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
CLEAR. LOWS 44 TO 50. HIGHS 74 TO 82. TERRAIN DRIVEN
WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 77 TO 85. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS 75 TO 83. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 45 TO 50. HIGHS 67 TO 76. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ700-161130-
CENTRAL MOUNTAINS OF OREGON-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....38-45.
* MAX HUMIDITY........90-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 10 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 5 TO 11 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...MODERATE (210-350) DECREASING TO LOW (58-116)
AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....66-71...EXCEPT 58-66 RIDGES.
* MIN HUMIDITY........33-48 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 5 TO 11 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 5 TO 11 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (79-139) INCREASING TO MODERATE TO HIGH
(433-651) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....37-46.
* MAX HUMIDITY........81-96 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (149-227) DECREASING TO LOW
(25-44) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....65-71...EXCEPT 59-64 RIDGES.
* MIN HUMIDITY........42-50 PERCENT...EXCEPT 50-62 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.......4000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-37) INCREASING TO LOW TO MODERATE
(129-227) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
A CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 38 TO 48.
HIGHS 70 TO 77. WEST WINDS UP TO 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 39 TO 48. HIGHS 74 TO 81. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 41 TO 50. HIGHS 77 TO 83. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 41 TO 51. HIGHS 75 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 39 TO 48. HIGHS 67 TO 73. WEST
WINDS 2 TO 7 MPH.
ORZ703-161130-
WARM SPRINGS RESERVATION-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE
EVENING. A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....43-49.
* MAX HUMIDITY........87-99 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (59-163) DECREASING TO LOW (41-81) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....66-73...EXCEPT 55-64 RIDGES.
* MIN HUMIDITY........40-49 PERCENT...EXCEPT 51-64 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 6 TO 12 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 6 TO 12 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 15 TO 20 MPH.
* VENTILATION INDEX...LOW (105-143) INCREASING TO HIGH TO VERY HIGH
(533-729) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....47-52.
* MAX HUMIDITY........67-76 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 2 TO 7 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 15 MPH BECOMING NORTH AROUND
5 MPH AFTER MIDNIGHT.
* VENTILATION INDEX...LOW TO MODERATE (193-219) DECREASING TO LOW
(25-39) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....71-76...EXCEPT 62-70 RIDGES.
* MIN HUMIDITY........38-44 PERCENT...EXCEPT 42-55 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 1 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-29) INCREASING TO LOW TO MODERATE
(174-256) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 71 TO 81. WEST WINDS
1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 75 TO 83. WEST
WINDS 1 TO 6 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 76 TO 85. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 71 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 45 TO 50. HIGHS 64 TO 74. WEST
WINDS 2 TO 7 MPH.
ORZ704-161130-
NORTHERN DESCHUTES NATIONAL FOREST-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....38-45.
* MAX HUMIDITY........87-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 4 TO 9 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
* VENTILATION INDEX...LOW (60-170) DECREASING TO LOW (51-99) AFTER
MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
* MAX TEMPERATURE.....63-68...EXCEPT 53-61 RIDGES.
* MIN HUMIDITY........45-53 PERCENT...EXCEPT 54-69 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 6 TO 12 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 7 TO 13 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 15 TO 20 MPH.
* VENTILATION INDEX...LOW (114-166) INCREASING TO MODERATE TO HIGH
(432-648) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....39-47.
* MAX HUMIDITY........71-86 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (173-229) DECREASING TO LOW
(25-44) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.....68-74...EXCEPT 58-67 RIDGES.
* MIN HUMIDITY........38-49 PERCENT...EXCEPT 48-63 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 6 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-29) INCREASING TO MODERATE (215-265)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
PARTLY CLOUDY. LOWS 41 TO 46. HIGHS 65 TO 77. WEST
WINDS 1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 40 TO 47. HIGHS 71 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 44 TO 50. HIGHS 73 TO 83. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 43 TO 51. HIGHS 67 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 40 TO 47. HIGHS 60 TO 71. WEST
WINDS 1 TO 6 MPH.
ORZ705-161130-
SOUTHERN DESCHUTES NATIONAL FOREST-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MIN TEMPERATURE.....34-40.
* MAX HUMIDITY........95-100 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH SHIFTING TO THE
NORTHEAST 7 TO 13 MPH AFTER MIDNIGHT.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (116-340) DECREASING TO LOW
(65-125) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF SHOWERS IN THE MORNING.
* MAX TEMPERATURE.....61-66...EXCEPT 52-60 RIDGES.
* MIN HUMIDITY........43-58 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 4 TO 9 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 4 TO 9 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 15 MPH.
* VENTILATION INDEX...LOW (116-180) INCREASING TO MODERATE TO HIGH
(442-578) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT.
* MIN TEMPERATURE.....33-41.
* MAX HUMIDITY........84-99 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (176-258) DECREASING TO LOW
(26-48) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS.
* MAX TEMPERATURE.....64-69...EXCEPT 56-63 RIDGES.
* MIN HUMIDITY........46-59 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 6 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................10 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...LOW (25-35) INCREASING TO MODERATE (210-306)
IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
A CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 34 TO 42.
HIGHS 67 TO 75. WEST WINDS UP TO 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 35 TO 43. HIGHS 72 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 37 TO 46. HIGHS 74 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 37 TO 47. HIGHS 69 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 35 TO 42. HIGHS 62 TO 71. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ697-161130-
CENTRAL BLUE MOUNTAINS-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT.
* MIN TEMPERATURE.....38-43.
* MAX HUMIDITY........78-93 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (61-239) DECREASING TO LOW
(34-62) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....66-72.
* MIN HUMIDITY........25-36 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (62-100) INCREASING TO MODERATE TO HIGH
(476-648) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
* MIN TEMPERATURE.....39-47.
* MAX HUMIDITY........78-93 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 6 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW (117-179) DECREASING TO LOW (26-42) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS.
* MAX TEMPERATURE.....62-67.
* MIN HUMIDITY........46-56 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 1 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................40 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH SHIFTING TO THE EAST IN
THE AFTERNOON.
* VENTILATION INDEX...LOW (25-38) INCREASING TO LOW TO MODERATE
(180-346) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS.
MOSTLY CLOUDY. LOWS 39 TO 45. HIGHS 64 TO 71. TERRAIN DRIVEN
WINDS LESS THAN 5 MPH.
SATURDAY
CLEAR. LOWS 39 TO 45. HIGHS 68 TO 75. TERRAIN DRIVEN
WINDS LESS THAN 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 41 TO 47. HIGHS 71 TO 78. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 43 TO 49. HIGHS 71 TO 78. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 41 TO 47. HIGHS 64 TO 70.
NORTHWEST WINDS UP TO 5 MPH.
ORZ698-161130-
SOUTHERN BLUE MOUNTAINS-
228 PM PDT TUE SEP 15 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY.
* MIN TEMPERATURE.....39-45.
* MAX HUMIDITY........77-92 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 4 TO 10 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 4 TO 10 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
* VENTILATION INDEX...LOW TO MODERATE (61-215) DECREASING TO LOW
(46-90) AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....69-76.
* MIN HUMIDITY........21-31 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTHEAST WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
* VENTILATION INDEX...LOW (77-103) INCREASING TO HIGH TO VERY HIGH
(623-755) IN THE AFTERNOON.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR THEN BECOMING MOSTLY CLOUDY. A
CHANCE OF SHOWERS AFTER MIDNIGHT.
* MIN TEMPERATURE.....39-47.
* MAX HUMIDITY........77-92 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....10 PERCENT (VERY LOW CHANCE).
* MIXING HEIGHT.......500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH.
* VENTILATION INDEX...LOW TO MODERATE (168-214) DECREASING TO LOW
(42-52) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY AND A SLIGHT
CHANCE OF THUNDERSTORMS.
* MAX TEMPERATURE.....64-70.
* MIN HUMIDITY........40-50 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 2 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................30 PERCENT.
* CHC OF LIGHTNING....20 PERCENT (SLIGHT CHANCE).
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 10 MPH SHIFTING TO THE SOUTHWEST
IN THE AFTERNOON.
* VENTILATION INDEX...LOW (31-43) INCREASING TO LOW TO MODERATE
(140-288) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. PARTLY CLOUDY. LOWS 39 TO 45. HIGHS 68 TO 73. WEST
WINDS 1 TO 6 MPH.
SATURDAY
CLEAR. LOWS 39 TO 45. HIGHS 71 TO 76. NORTHWEST WINDS
1 TO 6 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 41 TO 47. HIGHS 74 TO 79. EAST WINDS
UP TO 5 MPH.
MONDAY
PARTLY CLOUDY. LOWS 42 TO 48. HIGHS 75 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 41 TO 47. HIGHS 68 TO 74. NORTHWEST
WINDS 1 TO 6 MPH.
.8-14 DAY OUTLOOK FOR WEDNESDAY SEPTEMBER 23 THROUGH TUESDAY SEPTEMBER 29...
A GREATER CHANCE OF ABOVE NORMAL TEMPERATURES AND PRECIPITATION.
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