995
FNUS56 KPDT 171345
FWFPDT
FIRE WEATHER PLANNING FORECAST FOR NE OREGON AND SE WASHINGTON
NATIONAL WEATHER SERVICE PENDLETON OR
ISSUED BY NATIONAL WEATHER SERVICE PORTLAND OR
645 AM PDT WED SEP 17 2025
DISCUSSION
TODAY, HIGH PRESSURE WILL REMAIN OVER THE PACIFIC
NORTHWEST, WITH LOCALLY BREEZY CONDITIONS EXPECTED OVER THE
CASCADE GAPS. A TROUGH WILL APPROACH THE REGION BY THURSDAY AND
MOVE ACROSS THE AREA BY LATE IN THE WEEK. LITTLE TO NO RAIN IS
EXPECTED BEFORE THE WEEKEND.
***WINDS ARE 20 FOOT 10 MINUTE AVERAGES***
***CWR-CHANCE OF WETTING RAIN 0.10 OR GREATER***
***VENTILATION INDEX IS DERIVED FROM THE
TRANSPORT WIND MULTIPLIED BY THE MIXING
HEIGHT IN 100'S OF FEET. INDEX 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.***
NOTE: MAX TRANSPORT WINDS MAY NOT OCCUR
AT THE SAME TIME AS MAX MIXING HEIGHT.
WAZ695-180145-
EAST WASHINGTON SOUTH CENTRAL CASCADE MOUNTAINS-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....76-83...EXCEPT 68-75 RIDGES.
* MIN HUMIDITY........29-40 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTHEAST WINDS 1 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...POOR (27-67) INCREASING TO POOR TO FAIR
(158-286) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....46-53.
* MAX HUMIDITY........69-84 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 1 TO 6 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 1 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...POOR (40-136) DECREASING TO POOR (25-91)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....72-79...EXCEPT 63-72 RIDGES.
* MIN HUMIDITY........34-48 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 1 TO 6 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 2 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...POOR (27-95) INCREASING TO POOR TO FAIR
(110-224) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 45 TO 53. HIGHS 69 TO 81. NORTHWEST
WINDS 1 TO 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 46 TO 52. HIGHS 63 TO 77. WEST
WINDS 2 TO 7 MPH.
SUNDAY
A CHANCE OF SHOWERS. MOSTLY CLOUDY. LOWS 46 TO 53.
HIGHS 56 TO 69. WEST WINDS 3 TO 8 MPH.
MONDAY
MOSTLY CLEAR. LOWS 43 TO 49. HIGHS 64 TO 75. WEST WINDS
2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
47 TO 53. HIGHS 63 TO 75. SOUTHWEST WINDS 1 TO 5 MPH.
WAZ690-180145-
KITTITAS VALLEY-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....81-86...EXCEPT 72-82 RIDGES.
* MIN HUMIDITY........27-32 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.......6500 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH SHIFTING TO THE SOUTH IN
THE AFTERNOON.
* VENTILATION INDEX...POOR (25-55) INCREASING TO POOR TO FAIR
(155-261) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....53-59.
* MAX HUMIDITY........63-78 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT MODERATE RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 3 TO 8 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
* VENTILATION INDEX...POOR (50-164) DECREASING TO POOR (39-113)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....79-85...EXCEPT 70-80 RIDGES.
* MIN HUMIDITY........31-37 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 3 TO 8 MPH IN THE MORNING
BECOMING UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 3 TO 8 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* VENTILATION INDEX...POOR (38-112) INCREASING TO POOR TO FAIR
(125-235) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 52 TO 58. HIGHS 79 TO 86. NORTHWEST
WINDS 2 TO 7 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 52 TO 57. HIGHS 78 TO 85. WEST
WINDS 3 TO 8 MPH.
SUNDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 53 TO
60. HIGHS 71 TO 79. WEST WINDS 5 TO 11 MPH.
MONDAY
MOSTLY CLEAR. LOWS 47 TO 53. HIGHS 74 TO 80. SOUTHWEST
WINDS 3 TO 8 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 51 TO 57. HIGHS 74 TO 80. WEST
WINDS 1 TO 6 MPH.
WAZ694-180145-
YAKAMA ALPINE DISTRICT-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....78-84...EXCEPT 70-80 RIDGES.
* MIN HUMIDITY........27-37 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.......6500 FT AGL.
* TRANSPORT WINDS.....EAST AROUND 5 MPH SHIFTING TO THE SOUTH IN
THE AFTERNOON.
* VENTILATION INDEX...POOR (25-42) INCREASING TO POOR TO FAIR
(145-261) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....47-56.
* MAX HUMIDITY........72-87 PERCENT...EXCEPT 61-76 PERCENT RIDGES.
* 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.......NEAR SURFACE.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...POOR (36-94) DECREASING TO POOR (25-50) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....76-83...EXCEPT 68-78 RIDGES.
* MIN HUMIDITY........31-43 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.......6000 FT AGL.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* VENTILATION INDEX...POOR (25-41) INCREASING TO POOR (97-173) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 48 TO 56. HIGHS 73 TO 84. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 46 TO 54. HIGHS 70 TO 81. WEST
WINDS 2 TO 7 MPH.
SUNDAY
A SLIGHT CHANCE OF SHOWERS. PARTLY CLOUDY. LOWS 47 TO
55. HIGHS 62 TO 75. WEST WINDS 4 TO 9 MPH.
MONDAY
MOSTLY CLEAR. LOWS 44 TO 51. HIGHS 68 TO 80. SOUTHWEST
WINDS 2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
48 TO 55. HIGHS 68 TO 79. WEST WINDS 1 TO 5 MPH.
ORZ691-WAZ691-180145-
LOWER COLUMBIA BASIN OF OREGON-LOWER COLUMBIA BASIN OF WASHINGTON-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....81-87.
* MIN HUMIDITY........26-33 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.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-40) INCREASING TO POOR (69-145) IN
THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....53-58.
* MAX HUMIDITY........69-84 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH BECOMING
SOUTHWEST 1 TO 5 MPH AFTER MIDNIGHT.
* RIDGES/UPR SLOPES....WEST WINDS 2 TO 6 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* VENTILATION INDEX...POOR (25-103) DECREASING TO POOR (25-57)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-85.
* MIN HUMIDITY........30-39 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTHWEST WINDS 1 TO 5 MPH IN THE MORNING
BECOMING UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....WEST WINDS 2 TO 6 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-62) INCREASING TO POOR (94-156) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 53 TO 58. HIGHS 81 TO 86. WEST WINDS
1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 52 TO 57. HIGHS 80 TO 86.
SOUTHWEST WINDS 4 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 55 TO 60. HIGHS 75 TO 81. SOUTHWEST
WINDS 6 TO 12 MPH.
MONDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 78 TO 83. SOUTHWEST
WINDS 3 TO 8 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 53 TO 58. HIGHS 77 TO 82. WEST
WINDS 1 TO 6 MPH.
ORZ692-WAZ692-180145-
NORTHERN BLUE MOUNTAINS OF OREGON-BLUE MOUNTAINS OF WASHINGTON-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....78-86...EXCEPT 72-77 RIDGES.
* MIN HUMIDITY........23-31 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTHEAST WINDS 1 TO 5 MPH IN THE MORNING
BECOMING UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTHEAST WINDS 2 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...POOR (27-69) INCREASING TO POOR TO FAIR
(168-328) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....49-59.
* MAX HUMIDITY........49-64 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.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-48) DECREASING TO POOR (25-37) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....77-84...EXCEPT 72-77 RIDGES.
* MIN HUMIDITY........25-36 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-34) INCREASING TO POOR (86-184) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
PARTLY CLOUDY. LOWS 51 TO 58. HIGHS 74 TO 83. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 50 TO 57. HIGHS 72 TO 82.
SOUTHWEST WINDS 2 TO 7 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 50 TO 57. HIGHS 64 TO 75. SOUTHWEST
WINDS 3 TO 8 MPH.
MONDAY
MOSTLY CLEAR. LOWS 46 TO 52. HIGHS 70 TO 81. SOUTHWEST
WINDS 2 TO 7 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 51 TO 57. HIGHS 73 TO 82. SOUTHWEST
WINDS 1 TO 5 MPH.
ORZ693-WAZ693-180145-
CANYON GRASSLANDS OF WALLOWA COUNTY-
SOUTHEAST WASHINGTON GRANDE RONDE VALLEY-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....78-86...EXCEPT 71-78 RIDGES.
* MIN HUMIDITY........24-30 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTH WINDS 2 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-69) INCREASING TO POOR TO FAIR
(125-285) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....48-58.
* MAX HUMIDITY........52-67 PERCENT...EXCEPT 47-54 PERCENT RIDGES.
* 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 SOUTH 2
TO 5 MPH AFTER MIDNIGHT.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-57).
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....79-87...EXCEPT 73-79 RIDGES.
* MIN HUMIDITY........22-28 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTH WINDS 2 TO 5 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-51) INCREASING TO POOR TO FAIR
(83-237) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
PARTLY CLOUDY. LOWS 50 TO 59. HIGHS 77 TO 86. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 47 TO 57. HIGHS 75 TO 85. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 47 TO 57. HIGHS 66 TO 76. WEST
WINDS 2 TO 7 MPH.
MONDAY
MOSTLY CLEAR. LOWS 43 TO 52. HIGHS 73 TO 82. SOUTH
WINDS 1 TO 6 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 47 TO 57. HIGHS 77 TO 85. SOUTH
WINDS 1 TO 6 MPH.
ORZ701-180145-
EASTERN COLUMBIA RIVER GORGE OF OREGON-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-85.
* MIN HUMIDITY........30-45 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WINDS NORTH 1 TO 5 MPH IN THE AFTERNOON.
UPSLOPE LESS THAN 5 MPH. IN THE EASTERN COLUMBIA RIVER GORGE,
WINDS WEST 2 TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH SHIFTING TO THE
NORTHWEST IN THE AFTERNOON.
* VENTILATION INDEX...POOR (25-39) INCREASING TO POOR TO FAIR
(105-229) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....50-55.
* MAX HUMIDITY........77-92 PERCENT.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 2 TO 7 MPH...EXCEPT WEST 3 TO 8
MPH IN THE EASTERN COLUMBIA RIVER GORGE.
* RIDGES/UPR SLOPES....WEST WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....WEST 10 TO 15 MPH.
* VENTILATION INDEX...POOR TO FAIR (96-214) DECREASING TO POOR
(31-111) AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....77-82.
* MIN HUMIDITY........33-48 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST WINDS 1 TO 5 MPH IN THE MORNING
BECOMING UPSLOPE LESS THAN 5 MPH. IN THE EASTERN COLUMBIA
RIVER GORGE, WEST WINDS 3 TO 8 MPH.
* RIDGES/UPR SLOPES....WEST 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.....WEST AROUND 10 MPH.
* VENTILATION INDEX...POOR (25-109) INCREASING TO POOR TO FAIR
(111-229) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 50 TO 56. HIGHS 81 TO 86. WEST WINDS
1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 78 TO 83. WEST
WINDS 3 TO 8 MPH.
SUNDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
52 TO 57. HIGHS 71 TO 77. WEST WINDS 4 TO 9 MPH.
MONDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 77 TO 82. WEST WINDS
2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 53 TO 58. HIGHS 75 TO 80. WEST
WINDS 1 TO 5 MPH.
ORZ702-180145-
EAST SLOPES OF THE MT. HOOD NATIONAL FOREST-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....79-84...EXCEPT 72-80 RIDGES.
* MIN HUMIDITY........30-40 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.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-35) INCREASING TO POOR (62-118) IN
THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....47-55.
* MAX HUMIDITY........65-80 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT WINDS LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....WEST AROUND 10 MPH.
* VENTILATION INDEX...POOR (36-110) DECREASING TO POOR (25-59)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....77-82...EXCEPT 70-77 RIDGES.
* MIN HUMIDITY........33-46 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-42) INCREASING TO POOR (58-124) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 48 TO 56. HIGHS 73 TO 84. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 47 TO 54. HIGHS 69 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
48 TO 55. HIGHS 62 TO 76. WEST WINDS 1 TO 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 70 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
51 TO 57. HIGHS 67 TO 79. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
ORZ695-180145-
EAGLE CAP WILDERNESS-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....73-82...EXCEPT 62-71 RIDGES.
* MIN HUMIDITY........25-36 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTH 2 TO
5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTH WINDS 2 TO 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 10 MPH.
* VENTILATION INDEX...POOR (25-79) INCREASING TO POOR TO FAIR
(167-325) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....51-57...EXCEPT 45-53 RIDGES.
* MAX HUMIDITY........44-57 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.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-47).
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....74-83...EXCEPT 63-73 RIDGES.
* MIN HUMIDITY........24-32 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.......8500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-44) INCREASING TO POOR TO FAIR
(158-282) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
PARTLY CLOUDY. LOWS 49 TO 57. HIGHS 68 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 46 TO 55. HIGHS 66 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 45 TO 54. HIGHS 57 TO 72. WEST
WINDS 1 TO 6 MPH.
MONDAY
MOSTLY CLEAR. LOWS 41 TO 49. HIGHS 63 TO 78. SOUTH
WINDS 1 TO 5 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 47 TO 55. HIGHS 66 TO 80. SOUTH
WINDS 1 TO 5 MPH.
ORZ694-180145-
GRANDE RONDE VALLEY OF OREGON-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....81-86.
* MIN HUMIDITY........20-25 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTH WINDS 2 TO 7 MPH.
* RIDGES/UPR SLOPES....SOUTH WINDS 2 TO 7 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 10 MPH.
* VENTILATION INDEX...POOR (57-99) INCREASING TO FAIR TO GOOD
(430-538) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....45-51.
* MAX HUMIDITY........60-75 PERCENT.
* HUMIDITY RECOVERY...GOOD...EXCEPT MODERATE 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....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* VENTILATION INDEX...POOR (62-90) DECREASING TO POOR (30-48) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....82-87.
* MIN HUMIDITY........20-25 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 SOUTHEAST 3
TO 6 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...POOR (30-50) INCREASING TO FAIR (274-344) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
PARTLY CLOUDY. LOWS 48 TO 53. HIGHS 83 TO 88. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 81 TO 86. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 73 TO 78. WEST
WINDS 2 TO 6 MPH.
MONDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 79 TO 84. SOUTH
WINDS 2 TO 7 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS 80 TO 85. SOUTH
WINDS 1 TO 6 MPH.
ORZ699-180145-
WESTERN FORESTED BLUE MOUNTAINS-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....78-83...EXCEPT 71-78 RIDGES.
* MIN HUMIDITY........20-27 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTHEAST WINDS 1 TO 6 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...POOR (26-68) INCREASING TO POOR TO FAIR
(171-299) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....48-54.
* MAX HUMIDITY........45-60 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.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....EAST AROUND 5 MPH.
* VENTILATION INDEX...POOR (41-91) DECREASING TO POOR (25-45) AFTER
MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....77-84...EXCEPT 72-78 RIDGES.
* MIN HUMIDITY........22-30 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.......9000 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...POOR (25-43) INCREASING TO POOR TO FAIR
(139-309) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
PARTLY CLOUDY. LOWS 49 TO 56. HIGHS 74 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 47 TO 54. HIGHS 71 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 47 TO 53. HIGHS 64 TO 73. WEST
WINDS 1 TO 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 44 TO 50. HIGHS 71 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 49 TO 55. HIGHS 72 TO 80. SOUTH
WINDS 1 TO 5 MPH.
ORZ696-180145-
JOHN DAY VALLEY-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-88...EXCEPT 76-81 RIDGES.
* MIN HUMIDITY........18-23 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTHEAST WINDS 2 TO 5 MPH IN THE MORNING
BECOMING UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTHEAST WINDS 2 TO 6 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......9000 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* VENTILATION INDEX...POOR (33-79) INCREASING TO POOR TO FAIR
(170-310) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....49-54.
* MAX HUMIDITY........51-65 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.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...POOR (58-122) DECREASING TO POOR (25-50)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-88...EXCEPT 75-80 RIDGES.
* MIN HUMIDITY........20-28 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.......9000 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-44) INCREASING TO POOR TO FAIR
(84-282) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
PARTLY CLOUDY. LOWS 52 TO 57. HIGHS 78 TO 87. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 76 TO 85. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 50 TO 55. HIGHS 70 TO 79. WEST
WINDS 1 TO 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 77 TO 85. SOUTH
WINDS 1 TO 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 52 TO 57. HIGHS 77 TO 85. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ700-180145-
CENTRAL MOUNTAINS OF OREGON-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....81-86...EXCEPT 74-79 RIDGES.
* MIN HUMIDITY........17-26 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.......8500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* VENTILATION INDEX...POOR (26-60) INCREASING TO POOR TO FAIR
(131-349) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....42-51...EXCEPT 48-53 RIDGES.
* MAX HUMIDITY........66-81 PERCENT...EXCEPT 51-64 PERCENT RIDGES.
* HUMIDITY RECOVERY...GOOD...EXCEPT MODERATE RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTH WINDS 1 TO 5 MPH IN THE EVENING
BECOMING DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....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...POOR (81-159) DECREASING TO POOR (25-38)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....79-84...EXCEPT 73-80 RIDGES.
* MIN HUMIDITY........18-33 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.......7000 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH SHIFTING TO THE
SOUTHEAST IN THE AFTERNOON.
* VENTILATION INDEX...POOR (25-31) INCREASING TO POOR TO FAIR
(99-243) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
PARTLY CLOUDY. LOWS 46 TO 53. HIGHS 79 TO 84. NORTHWEST
WINDS 2 TO 7 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 45 TO 52. HIGHS 77 TO 83. WEST
WINDS 1 TO 6 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 44 TO 52. HIGHS 71 TO 78. WEST
WINDS 2 TO 7 MPH.
MONDAY
MOSTLY CLEAR. LOWS 42 TO 50. HIGHS 78 TO 84. SOUTH
WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
46 TO 54. HIGHS 76 TO 81. SOUTH WINDS 1 TO 5 MPH.
ORZ703-180145-
WARM SPRINGS RESERVATION-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-86...EXCEPT 71-78 RIDGES.
* MIN HUMIDITY........25-30 PERCENT...EXCEPT 31-41 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH SHIFTING TO THE NORTHWEST
IN THE AFTERNOON.
* VENTILATION INDEX...POOR (25-31) INCREASING TO POOR (59-117) IN
THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....49-54.
* MAX HUMIDITY........68-81 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST WINDS 1 TO 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST WINDS 1 TO 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
* VENTILATION INDEX...POOR (80-166) DECREASING TO POOR (25-57)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....78-84...EXCEPT 68-75 RIDGES.
* MIN HUMIDITY........29-35 PERCENT...EXCEPT 36-47 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....WEST 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.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-38) INCREASING TO POOR (99-155) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 78 TO 86. NORTHWEST
WINDS 1 TO 6 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 75 TO 86. WEST
WINDS 2 TO 7 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 51 TO 56. HIGHS 68 TO 80. WEST
WINDS 4 TO 9 MPH.
MONDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 76 TO 85. SOUTHWEST
WINDS 2 TO 7 MPH.
TUESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
52 TO 57. HIGHS 72 TO 81. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
ORZ704-180145-
NORTHERN DESCHUTES NATIONAL FOREST-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-86...EXCEPT 68-77 RIDGES.
* MIN HUMIDITY........24-30 PERCENT...EXCEPT 28-41 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-36) INCREASING TO POOR TO FAIR
(107-203) IN THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....43-50.
* MAX HUMIDITY........75-86 PERCENT...EXCEPT 64-79 PERCENT RIDGES.
* HUMIDITY RECOVERY...EXCELLENT...EXCEPT GOOD RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...DRAINAGE WINDS LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....NORTHWEST 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.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* VENTILATION INDEX...POOR (64-138) DECREASING TO POOR (25-38)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....78-83...EXCEPT 67-75 RIDGES.
* MIN HUMIDITY........29-35 PERCENT...EXCEPT 35-49 PERCENT RIDGES.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-31) INCREASING TO POOR (74-154) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLEAR. LOWS 45 TO 52. HIGHS 73 TO 86. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 44 TO 50. HIGHS 69 TO 83. WEST
WINDS 1 TO 6 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 44 TO 50. HIGHS 64 TO 76. WEST
WINDS 2 TO 7 MPH.
MONDAY
MOSTLY CLEAR. LOWS 43 TO 49. HIGHS 72 TO 84. SOUTHWEST
WINDS 1 TO 5 MPH.
TUESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
47 TO 53. HIGHS 67 TO 80. SOUTHWEST WINDS 1 TO 5 MPH.
ORZ705-180145-
SOUTHERN DESCHUTES NATIONAL FOREST-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....78-83...EXCEPT 69-77 RIDGES.
* MIN HUMIDITY........18-30 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.......8500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* VENTILATION INDEX...POOR (25-36) INCREASING TO FAIR (204-310) IN
THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....39-47.
* MAX HUMIDITY........77-92 PERCENT...EXCEPT 60-75 PERCENT RIDGES.
* 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....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
* VENTILATION INDEX...POOR (89-193) DECREASING TO POOR (25-43)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....77-82...EXCEPT 68-75 RIDGES.
* MIN HUMIDITY........21-36 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH SHIFTING TO THE
SOUTHEAST IN THE AFTERNOON.
* VENTILATION INDEX...POOR (25-32) INCREASING TO POOR (100-188) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
PARTLY CLOUDY. LOWS 42 TO 50. HIGHS 74 TO 83. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 42 TO 49. HIGHS 71 TO 80. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 39 TO 47. HIGHS 66 TO 76. WEST
WINDS 1 TO 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 39 TO 47. HIGHS 73 TO 82. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
TUESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS
43 TO 51. HIGHS 69 TO 77. TERRAIN DRIVEN WINDS LESS THAN 5 MPH.
ORZ697-180145-
CENTRAL BLUE MOUNTAINS-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....75-81...EXCEPT 70-77 RIDGES.
* MIN HUMIDITY........19-25 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH.
* RIDGES/UPR SLOPES....SOUTHEAST WINDS 1 TO 6 MPH IN THE MORNING
BECOMING LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* VENTILATION INDEX...POOR (29-65) INCREASING TO FAIR (220-368) IN
THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....44-51.
* MAX HUMIDITY........46-60 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.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* VENTILATION INDEX...POOR (60-118) DECREASING TO POOR (25-47)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....77-83...EXCEPT 72-78 RIDGES.
* MIN HUMIDITY........19-24 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.......8500 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...POOR (25-47) INCREASING TO FAIR (252-460) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLOUDY. LOWS 47 TO 53. HIGHS 75 TO 81. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 45 TO 52. HIGHS 73 TO 79. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 44 TO 50. HIGHS 66 TO 73. WEST
WINDS 1 TO 5 MPH.
MONDAY
MOSTLY CLEAR. LOWS 41 TO 47. HIGHS 71 TO 78. SOUTH
WINDS 1 TO 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 46 TO 52. HIGHS 71 TO 78. TERRAIN
DRIVEN WINDS LESS THAN 5 MPH.
ORZ698-180145-
SOUTHERN BLUE MOUNTAINS-
645 AM PDT WED SEP 17 2025
TODAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....76-82.
* MIN HUMIDITY........16-21 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHEAST 2
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......7500 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST AROUND 10 MPH.
* VENTILATION INDEX...POOR (31-69) INCREASING TO FAIR (256-368) IN
THE AFTERNOON.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....41-49...EXCEPT 46-51 RIDGES.
* MAX HUMIDITY........48-63 PERCENT...EXCEPT 45-52 PERCENT RIDGES.
* HUMIDITY RECOVERY...MODERATE.
* 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.....EAST AROUND 10 MPH.
* VENTILATION INDEX...POOR (97-157) DECREASING TO POOR (25-55)
AFTER MIDNIGHT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....77-82...EXCEPT 72-78 RIDGES.
* MIN HUMIDITY........16-21 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...UPSLOPE LESS THAN 5 MPH BECOMING SOUTHEAST 2
TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....LIGHT LESS THAN 5 MPH BECOMING SOUTHEAST 2
TO 5 MPH IN THE AFTERNOON.
* CWR.................0 PERCENT.
* CHC OF LIGHTNING....0 PERCENT.
* MIXING HEIGHT.......8000 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH.
* VENTILATION INDEX...POOR (25-52) INCREASING TO FAIR (259-419) IN
THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
FRIDAY
MOSTLY CLOUDY. LOWS 47 TO 53. HIGHS 79 TO 84. NORTHEAST
WINDS 1 TO 6 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 46 TO 51. HIGHS 76 TO 83.
NORTHWEST WINDS 2 TO 7 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 44 TO 50. HIGHS 71 TO 78. WEST
WINDS 2 TO 7 MPH.
MONDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS 75 TO 81. SOUTH
WINDS 1 TO 6 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 75 TO 81. SOUTH
WINDS 2 TO 7 MPH.
.8-14 DAY OUTLOOK FOR WEDNESDAY SEPTEMBER 24 THROUGH TUESDAY SEPTEMBER 30...
A GREATER CHANCE OF NEAR NORMAL TEMPERATURES AND ABOVE NORMAL
PRECIPITATION..
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page