108
FXUS66 KOTX 212100
AFDOTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
200 PM PDT THU AUG 21 2025
KEY MESSAGES
- WARM AND DRY THROUGH THE WEEKEND AND INTO NEXT WEEK WITH MUCH
OF CENTRAL WA AND THE L-C VALLEY IN AREAS OF MAJOR HEATRISK
WITH ISOLATED AREAS OF EXTREME HEATRISK.
- BREEZY NORTH TO NORTHEAST WINDS FOR FRIDAY.
SYNOPSIS
TEMPERATURES WILL TREND WARMER THROUGH THE WEEKEND AND REMAIN
WARM INTO EARLY NEXT WEEK. WIDESPREAD HIGHS IN THE MID 90S TO
LOW 100S ARE FORECAST FOR SATURDAY THROUGH TUESDAY WITH MODERATE
AND MAJOR HEATRISK FOR FAR EASTERN WASHINGTON AND NORTH IDAHO
AND MAJOR AND EXTREME HEATRISK FOR CENTRAL WASHINGTON.
DISCUSSION
TONIGHT THROUGH THURSDAY: ENSEMBLES CONTINUE TO KEEP THE REGION
UNDER A STRENGTHENING RIDGE DRIVEN BY A FOUR CORNERS HIGH
PRESSURE. IT WILL BRING A PROLONGED PERIOD OF HOT, DRY WEATHER
FOR THE INLAND NORTHWEST. THE APEX OF THE RIDGE WILL FROM ALONG
THE COAST AND KEEP THE INLAND NORTHWEST ON THE DOWNWARD EAST
SIDE. IT WILL PROMOTE A BREEZY NORTH WIND, IN THE MID 20 MPH
RANGE, THROUGH THE OKANOGAN VALLEY AND WATERVILLE PLATEAU.
TEMPERATURES WILL STEADILY RISE THROUGH THE WEEKEND AND INTO
THE START OF NEXT WEEK. HIGHS WILL RANGE FROM 10-20 DEGREES
ABOVE NORMAL FOR THIS TIME OF YEAR. HIGHS ARE EXPECTED TO BE IN
THE 90S TO LOW TRIPLE DIGITS. OVERNIGHT LOWS WILL BE IN UPPER
50S AND LOW 70S. A EXTREME HEAT WATCH IS IN PLACE FOR PORTIONS
OF THE EAST CASCADES, CENTRAL BASIN, AND OKANOGAN VALLEY FOR
SATURDAY THROUGH WEDNESDAY. SMOKE FROM AREA FIRES CAN SHAVE A
FEW DEGREES OFF THE EXPECTED HIGHS.
BY THE MIDDLE OF NEXT WEEK, THE RIDGE IS EXPECTED TO BEGIN TO
WEAKEN AND MOISTURE WILL BEGIN TO INTRUDE ON THE REGION. THIS
WOULD BRING THE POTENTIAL FOR ELEVATED THUNDERSTORMS, RAISING
THE RISK OF NEW FIRE STARTS. CONFIDENCE REMAINS LOW, WITH ONLY A
5-10% CHANCE OF THUNDERSTORMS IN THE NBM AT THIS TIME OVER THE
MOUNTAINS. THIS WILL CONTINUE TO BE MONITORED CLOSELY IN THE
COMING DAYS. /JDC
AVIATION
18Z TAFS: CONDITIONS WILL REMAIN VFR THROUGH THE NEXT 24 HOURS
WITH LIGHT WINDS.
FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: HIGH CONFIDENCE
FOR CONDITIONS TO REMAIN VFR.
-----------------------
CONFIDENCE DESCRIPTORS:
LOW - LESS THAN A 30 PERCENT CHANCE
MODERATE - 30 TO 70 PERCENT CHANCE
HIGH - GREATER THAN A 70 PERCENT CHANCE
FOR ADDITIONAL PROBABILISTIC INFORMATION FOR NWS SPOKANE
AIRPORTS, PLEASE REFER TO THE AVIATION DASHBOARD ON OUR WEBPAGE:
HTTPS:/WEATHER.GOV/OTX/AVNDASHBOARD
PRELIMINARY POINT TEMPS/POPS
SPOKANE 55 91 58 95 61 96 / 0 0 0 0 0 0
COEUR D'ALENE 57 90 59 95 61 96 / 0 0 0 0 0 0
PULLMAN 52 91 54 96 58 94 / 0 0 0 0 0 0
LEWISTON 61 98 64 102 67 102 / 0 0 0 0 0 0
COLVILLE 45 90 49 94 51 97 / 0 0 0 0 0 0
SANDPOINT 52 86 53 92 55 94 / 0 0 0 0 0 0
KELLOGG 59 88 61 94 64 94 / 0 0 0 0 0 0
MOSES LAKE 57 94 60 98 64 100 / 0 0 0 0 0 0
WENATCHEE 64 93 68 98 73 100 / 0 0 0 0 0 0
OMAK 58 93 60 98 64 100 / 0 0 0 0 0 0
OTX WATCHES/WARNINGS/ADVISORIES
WA...EXTREME HEAT WATCH FROM SATURDAY AFTERNOON THROUGH WEDNESDAY
EVENING FOR CENTRAL CHELAN COUNTY-LOWER GARFIELD AND
ASOTIN COUNTIES-MOSES LAKE AREA-OKANOGAN VALLEY-UPPER
COLUMBIA BASIN-WATERVILLE PLATEAU-WENATCHEE AREA-WESTERN
OKANOGAN COUNTY.
ID...EXTREME HEAT WATCH FROM SATURDAY AFTERNOON THROUGH WEDNESDAY
EVENING FOR LEWISTON AREA.
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