723
FNUS56 KOTX 182007
FWFOTX
FIRE WEATHER PLANNING FORECAST FOR EASTERN WASHINGTON AND NORTH IDAHO
NATIONAL WEATHER SERVICE SPOKANE WA
107 PM PDT FRI SEP 18 2026
DISCUSSION
CENTRAL WA:
- POOR TO FAIR RELATIVE HUMIDITY RECOVERY IN THE MOUNTAINS AND
FAIR TO GOOD HUMIDITY RECOVERY IN THE VALLEYS AND COLUMBIA BASIN
FRIDAY NIGHT.
- WARM AND DRY ON SATURDAY WITH LIGHT WINDS.
EASTERN WA:
- FAIR RELATIVE HUMIDITY RECOVERY IN THE MOUNTAINS WITH GOOD TO
EXCELLENT HUMIDITY RECOVERY IN THE VALLEYS FRIDAY NIGHT.
- WARM AND DRY ON SATURDAY WITH MOSTLY LIGHT WINDS. SOUTHERLY
WINDS WITH GUSTS 15-20 MPH IN THE OKANOGAN VALLEY SATURDAY
AFTERNOON.
NORTH ID:
- FAIR TO GOOD RELATIVE HUMIDITY RECOVERY IN THE MOUNTAINS WITH
GOOD TO EXCELLENT HUMIDITY RECOVERY IN THE VALLEYS FRIDAY NIGHT.
- WARM AND DRY ON SATURDAY WITH LIGHT WINDS.
WEATHER TRENDS WARMER AND DRIER WITH LIGHT WINDS AND MOSTLY CLEAR
SKIES THROUGH THE WEEKEND INTO EARLY NEXT WEEK. THIS WILL ALSO
RESULT IN POOR TO FAIR RELATIVE HUMIDITY RECOVERIES IN THE
MOUNTAINS FOR THE NEXT FEW DAYS.
***************************************************************
FORECASTS FOR 20 FOOT WIND SPEEDS (VALLEYS AND RIDGE TOPS) ARE
10 MINUTE AVERAGES REFLECTING RAWS WIND.
***VENTILATION INDEX IS DERIVED FROM TRANSPORT WIND
MULTIPLIED BY THE MIXING HEIGHT DIVIDED BY 100.
CATEGORIES: LOW (< 200), MODERATE (200-500),
HIGH (500-800), AND VERY HIGH (> 800).
***************************************************************
WAZ696-698-191330-
EAST WASHINGTON CENTRAL CASCADES (ZONE 696)-
EAST WASHINGTON NORTH CASCADES (ZONE 698)-
INCLUDING THE CITIES OF STEVENS PASS, LAKE WENATCHEE AREA,
AND LEAVENWORTH
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....51-61 VALLEYS AND 44-54 MOUNTAINS.
* 24 HR TREND........1 DEGREE COOLER.
* MAX HUMIDITY........55-70 PERCENT.
* 24 HR TREND........10 PERCENT WETTER VALLEYS, AND 5 PERCENT
WETTER MOUNTAINS.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST UP TO 7 MPH.
* RIDGES/UPR SLOPES....NORTHWEST UP TO 7 MPH.
* MIXING HEIGHT.......2500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (201).
SATURDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....74-84 VALLEYS AND 63-73 MOUNTAINS.
* 24 HR TREND........2 DEGREES WARMER.
* MIN HUMIDITY........30-45 PERCENT.
* 24 HR TREND........UNCHANGED.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTH 3 TO 6 MPH.
* RIDGES/UPR SLOPES....SOUTH 3 TO 6 MPH.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (333).
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....51-61 VALLEYS AND 44-54 MOUNTAINS.
* MAX HUMIDITY........50-65 PERCENT.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST UP TO 5 MPH.
* RIDGES/UPR SLOPES....WEST UP TO 5 MPH.
* MIXING HEIGHT.......2000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (166).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....75-85 VALLEYS AND 64-74 MOUNTAINS.
* MIN HUMIDITY........25-40 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST UP TO 3 MPH IN THE MORNING
SHIFTING TO THE SOUTHEAST 3 TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....WEST 3 TO 4 MPH IN THE MORNING SHIFTING TO
THE SOUTH 3 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (234) IN THE MORNING INCREASING TO
MODERATE (495) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
MONDAY...MOSTLY CLEAR. LOWS 52 TO 62 VALLEYS
45 TO
55 MOUNTAINS. HIGHS 74 TO 84 VALLEYS...62 TO 72 MOUNTAINS. WEST
WIND UP TO 5 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. LOWS 47 TO
57 VALLEYS...39 TO 49 MOUNTAINS. HIGHS 67 TO 77 VALLEYS...55 TO
65 MOUNTAINS. WEST WIND UP TO 10 MPH.
THURSDAY...MOSTLY CLOUDY. LOWS 48 TO 58 VALLEYS
40 TO
50 MOUNTAINS. HIGHS 66 TO 76 VALLEYS...55 TO 65 MOUNTAINS.
FRIDAY
MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS. LOWS 49 TO
59 VALLEYS...41 TO 51 MOUNTAINS. HIGHS 62 TO 72 VALLEYS...50 TO
60 MOUNTAINS.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
WAZ697-191330-
EAST PORTION OF NORTH CASCADES NATIONAL PARK/LAKE CHELAN NATIONAL
RECREATION AREA (ZONE 697)-
INCLUDING THE CITY OF STEHEKIN
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....51-61 VALLEYS AND 42-52 MOUNTAINS.
* 24 HR TREND........2 DEGREES COOLER.
* MAX HUMIDITY........60-75 PERCENT.
* 24 HR TREND........10 PERCENT WETTER VALLEYS, AND 20 PERCENT
WETTER MOUNTAINS.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST 3 TO 7 MPH.
* RIDGES/UPR SLOPES....NORTHWEST 3 TO 7 MPH.
* MIXING HEIGHT.......2000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (188).
SATURDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....77-87 VALLEYS AND 65-75 MOUNTAINS.
* 24 HR TREND........3 DEGREES COOLER.
* MIN HUMIDITY........25-35 PERCENT.
* 24 HR TREND........6 PERCENT WETTER VALLEYS, AND UNCHANGED
MOUNTAINS.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTH 3 TO 7 MPH.
* RIDGES/UPR SLOPES....SOUTH 3 TO 4 MPH IN THE MORNING SHIFTING TO
THE SOUTHWEST 3 TO 7 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (320).
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....51-61 VALLEYS AND 43-53 MOUNTAINS.
* MAX HUMIDITY........50-65 PERCENT.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST 3 TO 5 MPH.
* RIDGES/UPR SLOPES....WEST 3 TO 6 MPH IN THE EVENING SHIFTING TO
THE EAST 3 TO 5 MPH OVERNIGHT.
* MIXING HEIGHT.......2000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (146).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....78-88 VALLEYS AND 67-77 MOUNTAINS.
* MIN HUMIDITY........20-30 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST UP TO 3 MPH IN THE MORNING
SHIFTING TO THE SOUTH 3 TO 5 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTH 3 TO 6 MPH.
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (216) IN THE MORNING INCREASING TO
MODERATE (480) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
MONDAY...MOSTLY CLEAR. LOWS 52 TO 62 VALLEYS
44 TO
54 MOUNTAINS. HIGHS 74 TO 84 VALLEYS...61 TO 71 MOUNTAINS. WEST
WIND UP TO 10 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. LOWS 47 TO
57 VALLEYS...38 TO 48 MOUNTAINS. HIGHS 68 TO 78 VALLEYS...56 TO
66 MOUNTAINS. WEST WIND UP TO 10 MPH.
THURSDAY
PARTLY CLOUDY. A CHANCE OF RAIN SHOWERS. LOWS 47 TO
57 VALLEYS...39 TO 49 MOUNTAINS. HIGHS 68 TO 78 VALLEYS...56 TO
66 MOUNTAINS.
FRIDAY
PARTLY CLOUDY. A CHANCE OF RAIN SHOWERS. LOWS 50 TO
59 VALLEYS...41 TO 51 MOUNTAINS. HIGHS 64 TO 74 VALLEYS...51 TO
61 MOUNTAINS.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
WAZ704-191330-
METHOW VALLEY (ZONE 704)-
INCLUDING THE CITIES OF MAZAMA, WINTHROP, AND TWISP
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....49-57.
* 24 HR TREND........2 DEGREES COOLER.
* MAX HUMIDITY........50-65 PERCENT.
* 24 HR TREND........5 PERCENT DRIER.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......NORTHWEST UP TO 5 MPH.
* MIXING HEIGHT.......3000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (220).
SATURDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....75-85.
* 24 HR TREND........1 DEGREE COOLER.
* MIN HUMIDITY........25-35 PERCENT.
* 24 HR TREND........4 PERCENT WETTER.
* 20-FOOT WINDS.......NORTH UP TO 4 MPH IN THE MORNING SHIFTING TO
THE SOUTHEAST 3 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (335).
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....49-57.
* MAX HUMIDITY........55-70 PERCENT.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......SOUTHEAST UP TO 4 MPH IN THE EVENING SHIFTING
TO THE NORTHWEST UP TO 3 MPH OVERNIGHT.
* MIXING HEIGHT.......2000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (132).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....76-85.
* MIN HUMIDITY........24-35 PERCENT.
* 20-FOOT WINDS.......NORTHWEST UP TO 3 MPH IN THE MORNING SHIFTING
TO THE SOUTHEAST 3 TO 7 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......4000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (176) IN THE MORNING INCREASING TO
MODERATE (377) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
MONDAY
MOSTLY CLEAR. LOWS 49 TO 59. HIGHS 76 TO 84. WEST WIND
UP TO 5 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. LOWS 45 TO 55. HIGHS
69 TO 79. WEST WIND UP TO 5 MPH.
THURSDAY
MOSTLY CLOUDY. LOWS 45 TO 54. HIGHS 67 TO 76.
FRIDAY
MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS. LOWS 47 TO 55.
HIGHS 65 TO 73.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
WAZ703-191330-
OKANOGAN VALLEY (ZONE 703)-
INCLUDING THE CITIES OF CONCONULLY AND OMAK
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....52-57.
* 24 HR TREND........2 DEGREES WARMER.
* MAX HUMIDITY........55-70 PERCENT.
* 24 HR TREND........15 PERCENT WETTER.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......WEST UP TO 4 MPH IN THE EVENING SHIFTING TO
THE NORTH OVERNIGHT.
* MIXING HEIGHT.......2000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (91).
SATURDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....74-82.
* 24 HR TREND........4 DEGREES COOLER.
* MIN HUMIDITY........30-40 PERCENT.
* 24 HR TREND........5 PERCENT WETTER.
* 20-FOOT WINDS.......NORTHEAST UP TO 4 MPH IN THE MORNING
SHIFTING TO THE SOUTH 4 TO 10 MPH IN THE AFTERNOON. GUSTS UP TO
20 MPH IN THE AFTERNOON
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (114) IN THE MORNING INCREASING TO
MODERATE (399) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....52-57.
* MAX HUMIDITY........55-70 PERCENT.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......SOUTH 3 TO 6 MPH IN THE EVENING SHIFTING TO
THE NORTHEAST UP TO 3 MPH OVERNIGHT.
* MIXING HEIGHT.......1500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (140).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....75-83.
* MIN HUMIDITY........28-35 PERCENT.
* 20-FOOT WINDS.......NORTH UP TO 3 MPH IN THE MORNING SHIFTING TO
THE SOUTH 4 TO 10 MPH IN THE AFTERNOON. GUSTS UP TO 20 MPH IN
THE AFTERNOON.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (374).
FORECAST DAYS 3 THROUGH 7...
MONDAY
MOSTLY CLEAR. LOWS 53 TO 58. HIGHS 75 TO 83. SOUTHWEST
WIND UP TO 10 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. LOWS 49 TO 56. HIGHS
68 TO 78. WEST WIND UP TO 10 MPH.
THURSDAY THROUGH FRIDAY
MOSTLY CLOUDY. LOWS 50 TO 56. HIGHS
66 TO 76.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
WAZ702-191330-
COLVILLE RESERVATION (ZONE 702)-
INCLUDING THE CITIES OF NESPELEM AND KELLER
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....50-55.
* 24 HR TREND........UNCHANGED.
* MAX HUMIDITY........55-70 PERCENT.
* 24 HR TREND........10 PERCENT DRIER VALLEYS, AND 15 PERCENT
WETTER MOUNTAINS.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTHWEST UP TO 4 MPH IN THE EVENING
SHIFTING TO THE NORTH UP TO 5 MPH OVERNIGHT.
* RIDGES/UPR SLOPES....WEST UP TO 6 MPH IN THE EVENING SHIFTING TO
THE NORTH OVERNIGHT.
* MIXING HEIGHT.......2500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (135).
SATURDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....73-83 VALLEYS AND 67-77 MOUNTAINS.
* 24 HR TREND........UNCHANGED.
* MIN HUMIDITY........29-40 PERCENT.
* 24 HR TREND........5 PERCENT WETTER VALLEYS, AND UNCHANGED
MOUNTAINS.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...EAST UP TO 4 MPH IN THE MORNING SHIFTING TO
THE SOUTH 3 TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTHEAST UP TO 4 MPH IN THE MORNING
SHIFTING TO THE SOUTH 3 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (325).
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....50-55.
* MAX HUMIDITY........55-70 PERCENT.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTH UP TO 4 MPH IN THE EVENING SHIFTING TO
THE NORTHEAST UP TO 3 MPH OVERNIGHT.
* RIDGES/UPR SLOPES....SOUTH 3 TO 4 MPH IN THE EVENING SHIFTING TO
THE NORTHEAST OVERNIGHT.
* MIXING HEIGHT.......2000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (129).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....74-84 VALLEYS AND 67-77 MOUNTAINS.
* MIN HUMIDITY........26-35 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST 3 TO 5 MPH IN THE MORNING SHIFTING
TO THE SOUTH 3 TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST 3 TO 5 MPH IN THE MORNING SHIFTING TO
THE SOUTH 3 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (405).
FORECAST DAYS 3 THROUGH 7...
MONDAY...MOSTLY CLEAR. LOWS 51 TO 57. HIGHS 74 TO 84 VALLEYS
67 TO 77 MOUNTAINS. SOUTHEAST WIND UP TO 5 MPH.
TUESDAY...PARTLY CLOUDY. LOWS 50 TO 56. HIGHS 70 TO 80 VALLEYS
63 TO 73 MOUNTAINS. SOUTH WIND UP TO 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 48 TO 55. HIGHS 66 TO
76 VALLEYS...59 TO 68 MOUNTAINS. SOUTH WIND UP TO 5 MPH.
THURSDAY THROUGH FRIDAY
MOSTLY CLOUDY. LOWS 48 TO 55. HIGHS
67 TO 77 VALLEYS...60 TO 70 MOUNTAINS.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
WAZ699-191330-
OKANOGAN HIGHLANDS AND KETTLE MOUNTAINS (ZONE 699)-
INCLUDING THE CITIES OF REPUBLIC AND CURLEW
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....47-53.
* 24 HR TREND........3 DEGREES WARMER VALLEYS, AND 3 DEGREES COOLER
MOUNTAINS.
* MAX HUMIDITY........61-80 PERCENT VALLEYS AND 55-65 PERCENT
MOUNTAINS.
* 24 HR TREND........5 PERCENT DRIER VALLEYS, AND 10 PERCENT WETTER
MOUNTAINS.
* HUMIDITY RECOVERY...FAIR.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...WEST UP TO 3 MPH IN THE EVENING SHIFTING TO
THE NORTH OVERNIGHT.
* RIDGES/UPR SLOPES....NORTHWEST UP TO 3 MPH.
* MIXING HEIGHT.......2500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (152).
SATURDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....74-84 VALLEYS AND 67-76 MOUNTAINS.
* 24 HR TREND........1 DEGREE COOLER.
* MIN HUMIDITY........27-35 PERCENT.
* 24 HR TREND........9 PERCENT WETTER.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST UP TO 3 MPH IN THE MORNING
SHIFTING TO THE SOUTH 3 TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTHEAST UP TO 3 MPH IN THE MORNING
SHIFTING TO THE SOUTHWEST 3 TO 5 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (168) IN THE MORNING INCREASING TO
MODERATE (434) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....47-53.
* MAX HUMIDITY........65-80 PERCENT VALLEYS AND 55-70 PERCENT
MOUNTAINS.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTH UP TO 3 MPH IN THE EVENING SHIFTING TO
THE EAST OVERNIGHT.
* RIDGES/UPR SLOPES....SOUTH UP TO 4 MPH.
* MIXING HEIGHT.......2500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (173).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....75-85 VALLEYS AND 67-77 MOUNTAINS.
* MIN HUMIDITY........26-35 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST UP TO 3 MPH IN THE MORNING
SHIFTING TO THE SOUTH 3 TO 6 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTH UP TO 5 MPH.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (252) IN THE MORNING INCREASING TO
MODERATE (468) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
MONDAY...MOSTLY CLEAR. LOWS 48 TO 54. HIGHS 75 TO 85 VALLEYS
67 TO 76 MOUNTAINS. SOUTH WIND UP TO 5 MPH.
TUESDAY...PARTLY CLOUDY. LOWS 47 TO 54. HIGHS 72 TO 82 VALLEYS
64 TO 73 MOUNTAINS. SOUTHWEST WIND UP TO 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 45 TO 52. HIGHS 68 TO
78 VALLEYS...60 TO 68 MOUNTAINS. SOUTHWEST WIND UP TO 5 MPH.
THURSDAY
MOSTLY CLOUDY. LOWS 45 TO 51. HIGHS 69 TO
79 VALLEYS...61 TO 70 MOUNTAINS.
FRIDAY
MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS. LOWS 46 TO 53.
HIGHS 67 TO 77 VALLEYS...58 TO 67 MOUNTAINS.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
WAZ700-701-191330-
SELKIRK MOUNTAINS OF NORTHEAST WASHINGTON (ZONE 700)-
FOOTHILLS OF NORTHEAST WASHINGTON (ZONE 701)-
INCLUDING THE CITIES OF METALINE FALLS, IONE, COLVILLE,
DEER PARK, AND NEWPORT
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....46-52.
* 24 HR TREND........UNCHANGED.
* MAX HUMIDITY........61-80 PERCENT.
* 24 HR TREND........20 PERCENT DRIER VALLEYS, AND 10 PERCENT
WETTER MOUNTAINS.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...LIGHT WINDS IN THE EVENING BECOMING NORTH UP
TO 3 MPH OVERNIGHT.
* RIDGES/UPR SLOPES....NORTH UP TO 5 MPH.
* MIXING HEIGHT.......1500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....NORTH AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (74).
SATURDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....74-82 VALLEYS AND 66-75 MOUNTAINS.
* 24 HR TREND........2 DEGREES WARMER.
* MIN HUMIDITY........30-35 PERCENT VALLEYS AND 35-45 PERCENT
MOUNTAINS.
* 24 HR TREND........UNCHANGED VALLEYS, AND 5 PERCENT DRIER
MOUNTAINS.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...LIGHT WINDS IN THE MORNING BECOMING
SOUTHWEST 3 TO 4 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST UP TO 4 MPH IN THE MORNING SHIFTING TO
THE SOUTHWEST 3 TO 4 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (285).
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....46-53.
* MAX HUMIDITY........71-90 PERCENT VALLEYS AND 65-80 PERCENT
MOUNTAINS.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...LIGHT WINDS.
* RIDGES/UPR SLOPES....SOUTH UP TO 4 MPH IN THE EVENING SHIFTING TO
THE NORTHEAST OVERNIGHT.
* MIXING HEIGHT.......2000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (115).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....76-83 VALLEYS AND 66-76 MOUNTAINS.
* MIN HUMIDITY........27-35 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHEAST UP TO 3 MPH IN THE MORNING
SHIFTING TO THE SOUTH UP TO 4 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....NORTHEAST 3 TO 4 MPH IN THE MORNING SHIFTING
TO THE SOUTHWEST IN THE AFTERNOON.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (367).
FORECAST DAYS 3 THROUGH 7...
MONDAY...MOSTLY CLEAR. LOWS 47 TO 55. HIGHS 76 TO 83 VALLEYS
66 TO 76 MOUNTAINS. SOUTH WIND UP TO 5 MPH.
TUESDAY...PARTLY CLOUDY. LOWS 47 TO 55. HIGHS 72 TO 79 VALLEYS
63 TO 72 MOUNTAINS. SOUTH WIND UP TO 5 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 46 TO 52. HIGHS 68 TO
75 VALLEYS...59 TO 67 MOUNTAINS. SOUTH WIND UP TO 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 44 TO 51. HIGHS 71 TO
78 VALLEYS...62 TO 71 MOUNTAINS.
FRIDAY
MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS. LOWS 46 TO 53.
HIGHS 68 TO 75 VALLEYS...59 TO 67 MOUNTAINS.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
IDZ101-191330-
NORTHERN AND CENTRAL IDAHO PANHANDLE (ZONE 101)-
INCLUDING THE CITIES OF ST. MARIES, RATHDRUM PRAIRIE,
SILVER VALLEY, BONNERS FERRY, AND PRIEST LAKE
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....46-54.
* 24 HR TREND........UNCHANGED.
* MAX HUMIDITY........71-90 PERCENT VALLEYS AND 65-80 PERCENT
MOUNTAINS.
* 24 HR TREND........25 PERCENT DRIER.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...NORTHWEST UP TO 3 MPH IN THE EVENING
SHIFTING TO THE NORTH OVERNIGHT.
* RIDGES/UPR SLOPES....NORTH UP TO 5 MPH.
* MIXING HEIGHT.......1500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (110).
SATURDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....73-80 VALLEYS AND 64-74 MOUNTAINS.
* 24 HR TREND........5 DEGREES WARMER.
* MIN HUMIDITY........35-50 PERCENT.
* 24 HR TREND........5 PERCENT DRIER.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...EAST UP TO 3 MPH IN THE MORNING SHIFTING TO
THE WEST 3 TO 4 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....EAST UP TO 4 MPH IN THE MORNING SHIFTING TO
THE WEST 3 TO 5 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....WEST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (290).
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....47-55.
* MAX HUMIDITY........71-90 PERCENT VALLEYS AND 65-80 PERCENT
MOUNTAINS.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...SOUTHWEST UP TO 3 MPH IN THE EVENING
SHIFTING TO THE EAST OVERNIGHT.
* RIDGES/UPR SLOPES....SOUTHWEST 3 TO 4 MPH IN THE EVENING SHIFTING
TO THE SOUTHEAST OVERNIGHT.
* MIXING HEIGHT.......1500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (108).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....75-81 VALLEYS AND 66-76 MOUNTAINS.
* MIN HUMIDITY........30-45 PERCENT.
* 20-FOOT WINDS.......
* VALLEYS/LWR SLOPES...EAST UP TO 3 MPH IN THE MORNING SHIFTING TO
THE SOUTHWEST UP TO 4 MPH IN THE AFTERNOON.
* RIDGES/UPR SLOPES....SOUTHEAST 3 TO 4 MPH IN THE MORNING SHIFTING
TO THE SOUTHWEST 3 TO 5 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......6000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (387).
FORECAST DAYS 3 THROUGH 7...
MONDAY...MOSTLY CLEAR. LOWS 48 TO 56. HIGHS 76 TO 82 VALLEYS
66 TO 76 MOUNTAINS. SOUTH WIND UP TO 5 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. LOWS 47 TO 56. HIGHS
69 TO 79 VALLEYS...62 TO 72 MOUNTAINS. SOUTH WIND UP TO 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 46 TO 54. HIGHS 73 TO
80 VALLEYS...65 TO 75 MOUNTAINS.
FRIDAY...PARTLY CLOUDY. LOWS 48 TO 55. HIGHS 69 TO 75 VALLEYS
61 TO 71 MOUNTAINS.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
WAZ707-191330-
WESTERN COLUMBIA BASIN (ZONE 707)-
INCLUDING THE CITIES OF MOSES LAKE AND EPHRATA
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....50-56.
* 24 HR TREND........2 DEGREES WARMER.
* MAX HUMIDITY........71-90 PERCENT.
* 24 HR TREND........UNCHANGED.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......SOUTHWEST 3 TO 4 MPH IN THE EVENING SHIFTING
TO THE EAST 3 TO 5 MPH OVERNIGHT.
* MIXING HEIGHT.......2500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (127).
SATURDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....77-81.
* 24 HR TREND........1 DEGREE WARMER.
* MIN HUMIDITY........30-40 PERCENT.
* 24 HR TREND........5 PERCENT WETTER.
* 20-FOOT WINDS.......SOUTHEAST UP TO 5 MPH IN THE MORNING SHIFTING
TO THE SOUTH 3 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (293).
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....50-57.
* MAX HUMIDITY........65-80 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......SOUTH UP TO 6 MPH IN THE EVENING SHIFTING TO
THE NORTHEAST UP TO 4 MPH OVERNIGHT.
* MIXING HEIGHT.......2000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (128).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....79-84.
* MIN HUMIDITY........25-35 PERCENT.
* 20-FOOT WINDS.......NORTHEAST UP TO 6 MPH IN THE MORNING SHIFTING
TO THE SOUTH 3 TO 5 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (309).
FORECAST DAYS 3 THROUGH 7...
MONDAY
MOSTLY CLEAR. LOWS 51 TO 59. HIGHS IN THE LOWER TO MID
80S. WEST WIND UP TO 5 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. LOWS 49 TO 57. HIGHS
72 TO 80. SOUTHWEST WIND UP TO 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 49 TO 55. HIGHS 73 TO 79.
FRIDAY
PARTLY CLOUDY. A CHANCE OF RAIN SHOWERS. LOWS 50 TO 56.
HIGHS 70 TO 75.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
WAZ708-191330-
EASTERN COLUMBIA BASIN - PALOUSE - SPOKANE AREA (ZONE 708)-
INCLUDING THE CITIES OF SPOKANE, PULLMAN, RITZVILLE, WILBUR,
AND CHENEY
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....48-54.
* 24 HR TREND........1 DEGREE COOLER.
* MAX HUMIDITY........70-80 PERCENT.
* 24 HR TREND........UNCHANGED.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......SOUTHWEST UP TO 4 MPH.
* MIXING HEIGHT.......3000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (153).
SATURDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....76-82.
* 24 HR TREND........UNCHANGED.
* MIN HUMIDITY........30-35 PERCENT.
* 24 HR TREND........UNCHANGED.
* 20-FOOT WINDS.......SOUTH UP TO 4 MPH IN THE MORNING SHIFTING TO
THE SOUTHWEST 3 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (288).
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....49-55.
* MAX HUMIDITY........70-80 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......SOUTHWEST UP TO 5 MPH IN THE EVENING SHIFTING
TO THE EAST UP TO 3 MPH OVERNIGHT.
* MIXING HEIGHT.......2500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (156).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....79-86.
* MIN HUMIDITY........24-30 PERCENT.
* 20-FOOT WINDS.......EAST 3 TO 6 MPH IN THE MORNING SHIFTING TO
THE SOUTH 3 TO 5 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......6500 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (333).
FORECAST DAYS 3 THROUGH 7...
MONDAY
MOSTLY CLEAR. LOWS 50 TO 56. HIGHS 80 TO 87. SOUTH WIND
UP TO 10 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. LOWS 49 TO 56. HIGHS
72 TO 82. SOUTHWEST WIND UP TO 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 48 TO 54. HIGHS 77 TO 83.
FRIDAY
PARTLY CLOUDY. LOWS 50 TO 55. HIGHS 72 TO 78.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
WAZ709-191330-
LOWER PALOUSE - SNAKE RIVER (ZONE 709)-
INCLUDING THE CITY OF POMEROY
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....51-55.
* 24 HR TREND........UNCHANGED.
* MAX HUMIDITY........65-80 PERCENT.
* 24 HR TREND........10 PERCENT DRIER.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......SOUTHWEST 3 TO 6 MPH.
* MIXING HEIGHT.......2500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (219).
SATURDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....73-83.
* 24 HR TREND........1 DEGREE WARMER.
* MIN HUMIDITY........35-45 PERCENT.
* 24 HR TREND........UNCHANGED.
* 20-FOOT WINDS.......SOUTHWEST 3 TO 6 MPH IN THE MORNING SHIFTING
TO THE NORTHWEST IN THE AFTERNOON.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (263).
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....52-56.
* MAX HUMIDITY........65-80 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......NORTHWEST 3 TO 4 MPH IN THE EVENING SHIFTING
TO THE SOUTHEAST 3 TO 6 MPH OVERNIGHT.
* MIXING HEIGHT.......2000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (100).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....77-87.
* MIN HUMIDITY........27-40 PERCENT.
* 20-FOOT WINDS.......SOUTHEAST 3 TO 7 MPH IN THE MORNING SHIFTING
TO THE NORTHEAST 3 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......5500 FT AGL.
* TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (319).
FORECAST DAYS 3 THROUGH 7...
MONDAY
MOSTLY CLEAR. LOWS IN THE MID TO UPPER 50S. HIGHS 78 TO
88. SOUTH WIND UP TO 5 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 54 TO 59. HIGHS 74 TO 84.
SOUTHWEST WIND UP TO 5 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE 50S. HIGHS 71 TO 81.
SOUTHWEST WIND UP TO 5 MPH.
THURSDAY
PARTLY CLOUDY. LOWS IN THE LOWER TO MID 50S. HIGHS
76 TO 85.
FRIDAY
PARTLY CLOUDY. LOWS 53 TO 58. HIGHS 71 TO 80.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
WAZ705-706-191330-
FOOTHILLS OF CENTRAL WASHINGTON CASCADES (ZONE 705)-
WATERVILLE PLATEAU (ZONE 706)-
INCLUDING THE CITIES OF CHELAN, WENATCHEE, WATERVILLE,
AND GRAND COULEE
107 PM PDT FRI SEP 18 2026
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....50-60.
* 24 HR TREND........5 DEGREES WARMER.
* MAX HUMIDITY........61-80 PERCENT.
* 24 HR TREND........20 PERCENT WETTER.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......SOUTHWEST 3 TO 6 MPH IN THE EVENING SHIFTING
TO THE NORTHWEST UP TO 6 MPH OVERNIGHT.
* MIXING HEIGHT.......3000 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....WEST 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (154).
SATURDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....74-84.
* 24 HR TREND........1 DEGREE WARMER.
* MIN HUMIDITY........29-35 PERCENT.
* 24 HR TREND........5 PERCENT WETTER.
* 20-FOOT WINDS.......NORTHEAST UP TO 5 MPH IN THE MORNING SHIFTING
TO THE SOUTH 3 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......4500 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (104) IN THE MORNING INCREASING TO
MODERATE (317) IN THE AFTERNOON.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MIN TEMPERATURE.....51-60.
* MAX HUMIDITY........61-80 PERCENT.
* HUMIDITY RECOVERY...GOOD.
* 20-FOOT WINDS.......SOUTH 3 TO 6 MPH IN THE EVENING SHIFTING TO
THE NORTHWEST UP TO 4 MPH OVERNIGHT.
* MIXING HEIGHT.......2500 FT AGL FALLING TO NEAR SURFACE.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...MODERATE (205).
SUNDAY
* SKY/WEATHER.........SUNNY.
* CHANCE OF LIGHTNING...0 PERCENT.
* MAX TEMPERATURE.....75-85.
* MIN HUMIDITY........27-35 PERCENT.
* 20-FOOT WINDS.......NORTH UP TO 6 MPH IN THE MORNING SHIFTING TO
THE SOUTHEAST 3 TO 6 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......5000 FT AGL.
* TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
* CWR (> 0.10 IN).....0 PERCENT.
* VENTILATION INDEX...LOW (170) IN THE MORNING INCREASING TO
MODERATE (375) IN THE AFTERNOON.
FORECAST DAYS 3 THROUGH 7...
MONDAY
MOSTLY CLEAR. LOWS 53 TO 61. HIGHS 76 TO 86. WEST WIND
UP TO 5 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY. LOWS 49 TO 59. HIGHS
69 TO 79. WEST WIND UP TO 10 MPH.
THURSDAY THROUGH FRIDAY
PARTLY CLOUDY. LOWS 49 TO 58. HIGHS
66 TO 76.
.8 TO 14 DAY OUTLOOK FOR SEP 26 - OCT 02, 2026
NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION.
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