359
FXUS66 KOTX 080459
AFDOTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
959 PM PDT SUN SEP 7 2025
KEY MESSAGES
- COOLER AND UNSETTLED WEATHER RETURNING TO THE REGION NEXT WEEK
WITH INCREASING THREAT FOR SHOWERS AND AFTERNOON THUNDERSTORMS.
- IMPROVING AIR QUALITY EXPECTED WITH PATTERN CHANGE.
SYNOPSIS
SMOKE AND HAZE IS EXPECTED INTO EARLY NEXT WEEK THOUGH WE HAVE
SEEN SOME IMPROVEMENT IN AREAS. THE THREAT FOR SHOWERS AND
THUNDERSTORMS WILL BE IN THE MOUNTAINS TODAY THEN BECOME MORE
WIDESPREAD NEXT WEEK. TEMPERATURES WILL BE COOLING INTO THE
70S BY NEXT WEEK.
DISCUSSION
TONIGHT: A SHORTWAVE TROUGH IS CURRENTLY PUSHING ACROSS THE
INLAND NORTHWEST. IT IS PRODUCING ISOLATED THUNDERSTORMS AND
SHOWERS ALONG THE CANADIAN BORDER AND LOWER ID PANHANDLE. THE
THUNDERSTORMS HAVE A CHANCE OF PRODUCING GUSTY WINDS, SMALL
HAIL, BRIEF HEAVY RAIN, AND LIGHTNING. THE GUSTY WIND SPEEDS
WILL RANGE BETWEEN 25-30 MPH. AS THE EVENING SETTLES IN OVER
THE REGION, THE ACTIVITY WILL DIMINISH WITH A STABILIZING
ENVIRONMENT. OVERNIGHT LOWS ARE EXPECTED TO BE IN THE 50S AND
LOW 60S.
MONDAY THROUGH THURSDAY: MODELS CONTINUE TO KEEP THE UPPER-LOW
PARKED OVER THE NORTHWEST THROUGH MUCH OF THE WEEK. TEMPERATURES
WILL BE TRENDING COOLER WITH INCREASED HUMIDITY. JUST ABOUT
EVERY DAY FROM MONDAY THROUGH WEDNESDAY CARRIES SOME DEGREE OF
PRECIPITATION CHANCES. CURRENTLY, THE HIGHEST PROBABILITIES FOR
WETTING RAINS ARRIVES MONDAY NIGHT INTO TUESDAY WHEN THE
STRONGEST DYNAMICS LIFT INTO THE AREA DELIVERING A 40-60% CHANCE
FOR A TENTH OR MORE. PRECIP AMOUNTS RANGE FROM A TENTH OR TWO
FOR THE LOWLANDS AND A QUARTER TO 3 QUARTERS OF AN INCH FOR THE
HIGHER TERRAINS. THE THUNDERSTORM THREAT HAS WEAKENED FROM
PREVIOUS RUNS BUT WILL STILL NEED TO KEEP AN EYE ON IT. HIGHS
WILL BE IN THE 70S. LOWS WILL BE IN THE 50S.
THE LOW WILL FILL AND BEGIN TO DRIFT OUT THE REGION FRIDAY AS
ANOTHER LOW APPROACHES THE COAST. A RIDGE WILL BUILD IN BETWEEN
THE TWO LOWS. IT WILL START A DRYING TREND FOR THE REGION AND
INTO THE WEEKEND. WITH LESS SUN TIME, TEMPERATURES ARE EXPECTED
TO REMAIN MILD AND NEAR SEASON NORMALS. HIGHS WILL BE IN THE 70S
AND LOWS WILL BE IN THE 50S. /JDC
AVIATION
06Z TAFS: SMOKE AND HAZE WILL CONTINUE TO BRING DEGRADED VIS
BUT LOCATIONS ARE EXPECTED TO REMAIN VFR. THUNDERSTORM CHANCES
WILL INCREASE AROUND 00-03Z TUESDAY FOR THE COLUMBIA BASIN AND
SOUTHEAST WASHINGTON (KMWH-KPUW-KLWS).
FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS:
LOW CONFIDENCE ON MVFR CONDITIONS.
-----------------------
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 58 83 56 76 55 78 / 20 10 40 40 30 20
COEUR D'ALENE 58 83 57 78 56 77 / 20 10 40 40 30 30
PULLMAN 53 80 51 71 50 72 / 40 10 60 40 40 30
LEWISTON 62 86 60 79 61 78 / 50 10 60 50 50 40
COLVILLE 47 82 46 77 45 77 / 20 30 30 70 40 40
SANDPOINT 53 80 52 78 51 75 / 20 20 30 60 50 40
KELLOGG 59 80 56 74 57 75 / 30 20 40 60 50 40
MOSES LAKE 56 83 57 75 54 76 / 10 10 50 60 20 30
WENATCHEE 61 82 61 73 60 77 / 20 10 60 80 30 20
OMAK 59 85 60 79 58 80 / 20 20 40 70 30 20
OTX WATCHES/WARNINGS/ADVISORIES
WA...AIR QUALITY ALERT UNTIL NOON PDT MONDAY FOR CENTRAL CHELAN
COUNTY-LOWER GARFIELD AND ASOTIN COUNTIES-MOSES LAKE AREA-
NORTHEAST BLUE MOUNTAINS-NORTHEAST MOUNTAINS-OKANOGAN
HIGHLANDS-OKANOGAN VALLEY-SPOKANE AREA-UPPER COLUMBIA
BASIN-WASHINGTON PALOUSE-WATERVILLE PLATEAU-WENATCHEE
AREA-WESTERN CHELAN COUNTY-WESTERN OKANOGAN COUNTY.
ID...AIR QUALITY ALERT UNTIL NOON PDT MONDAY FOR CENTRAL PANHANDLE
MOUNTAINS-COEUR D'ALENE AREA-IDAHO PALOUSE-LEWIS AND
SOUTHERN NEZ PERCE COUNTIES-LEWISTON AREA-NORTHERN
PANHANDLE.
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