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FXUS66 KOTX 252315
AFDOTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
315 PM PST TUE NOV 25 2025
KEY MESSAGES
- MOUNTAIN SNOW IMPACTING PASSES INTO WEDNESDAY.
- HIGH DEGREE OF UNCERTAINTY FOR VALLEY SNOW POTENTIAL TUESDAY NIGHT
INTO WEDNESDAY AND WEDNESDAY NIGHT INTO THURSDAY. LIGHT TO
MODERATE SNOW ON THE MOUNTAIN PASSES.
- COLDER TEMPERATURES OVER WEEKEND.
SYNOPSIS
A WARM FRONT WILL CONTINUE TRACKING THROUGH THE REGION THROUGH
WEDNESDAY BRING SNOW IMPACTS TO THE MOUNTAIN PASSES. A MIDWEEK
SYSTEMS WILL BRING THE POTENTIAL FOR LIGHT SNOW IN THE LOWLANDS
AND MODERATE SNOW OVER THE MOUNTAINS BUT CARRIES HIGH
UNCERTAINTY. A DRY, COLD AIR PUSH WILL BRING COLDER TEMPERATURES
FOR THE WEEKEND.
DISCUSSION
TONIGHT THROUGH WEDNESDAY: A SYSTEM IS CURRENTLY PUSHING THROUGH
THE PACIFIC NORTHWEST. IT IS SWINGING A MOIST WARM FRONT OVER
EASTERN WASHINGTON. IT WILL CONTINUE TO BRING MOUNTAIN SNOW AND
WINTRY MIX BEFORE EXITING WEDNESDAY MORNING. HIGHEST PRECIP
AMOUNTS ARE EXPECTED OVER THE CASCADES AND LESSENING AS THE
SYSTEM SPREADS EAST. CASCADES CREST WILL RECEIVE SNOW AMOUNTS
RANGING FROM 6 TO 10 INCHES. STEVENS PASS HAS A 90 PERCENT
PROBABILITY OF LOCALLY HEAVIER AMOUNT OF 13 INCHES THROUGH
WEDNESDAY MORNING. THE MIDSLOPES OF CASCADES HAVE RANGE OF 1 TO
4 INCHES. THE REST OF THE REGION WILL STRUGGLE TO GET MORE THAN
AN INCH AS A WINTRY MIX IS EXPECTED. OVERNIGHT LOWS WILL BE IN
THE UPPER 20S AND LOW 30S. DRIER AIR AND CLEARING SKIES FILL IN
BEHIND THE EXITING SYSTEM THROUGH THE DAY WEDNESDAY. DAYTIME
HIGHS WILL BE IN THE 40S.
WEDNESDAY NIGHT THROUGH THURSDAY: OVERNIGHT WEDNESDAY INTO
THURSDAY, A WELL ORGANIZED LOW WILL MOVE THROUGH THE PACIFIC
NORTHWEST. IT HAS WARMER AIR ASSOCIATED WITH IT THAN THE
PREVIOUS ONE. 850MB TEMPERATURES ARE EXPECTED TO SLIGHTLY BELOW
0 DEGREES CELSIUS. SNOW LEVELS FOR MOST OF THE REGION WILL BE
4000FT OR HIGHER. IT LEADS TO MOUNTAIN SNOW AND LOWLAND EVENT
FOR MOST. THE EXCEPTION WILL BE THE NORTHERN PORTION OF EASTERN
WASHINGTON. IT HAS THE COLDEST UPPER LEVELS WITH SNOW LEVELS
AROUND 3000 TO 3500 FEET. NORTHERN VALLEYS SHOULD SEE A WINTRY
MIX IF NOT SNOW. FOR AMOUNTS, STEVENS PASS CAN RANGE FROM 2 TO 7
INCHES. A RANGE 1 TO 5 INCHES IS EXPECTED ACROSS THE NORTHERN
PORTIONS. PRECIP TYPE UNCERTAINTY IS HIGH WITH THE SYSTEM AS IT
VERY BORDERLINE ON THE TEMPERATURES. TEMPERATURES A FEW DEGREES
HIGHER THAN PREVIOUS DAY. OVERNIGHT LOWS WILL BE IN THE 30S.
HIGHS WILL BE IN THE 40S.
FRIDAY TO MONDAY: A RIDGE PATTERN WILL BEGIN TO DEVELOP OFF THE
COAST. IT WILL PROMOTE A COLD, DRY AIR PUSH INTO THE PACIFIC
NORTHWEST. THERE IS POTENTIAL LIGHT SNOW SHOWERS CONTINUING OVER
THE MOUNTAINS OF THE CASCADES AND IDAHO PANHANDLE BUT NOT
BRINGING ANY SIGNIFICANT SNOW AMOUNTS. THE MAIN POINT IS THIS
THE SEASONS FIRST DECENT ARCTIC AIR PUSH. HIGHS WILL BE IN THE
30S. OVERNIGHT LOWS WILL BE IN THE 20S. /JDC
AVIATION
00Z TAFS: A WARM FRONT IS CURRENTLY BRINGING SNOW TO THE
CASCADES. IFR CONDITIONS ARE CURRENTLY OVER KMWH AND KEAT. IFR
CONDITIONS KGEG, KSFF, KCOE, KPUW, AND KLWS BY 02Z. AS PRECIP
MOVES IN, CONDITIONS WILL DEGRADE TO MVFR/IFR WITH CEILINGS
FALLING AND VISIBILITIES DECREASING. TAF SITES WILL HAVE IFR
CONDITIONS EARLY WEDNESDAY MORNING. SNOW ACCUMULATION WILL BE
LESS THAN AN INCH FOR AREA TAF SITES. CONDITIONS WILL CONTINUE
TO BE IFR/MVFR THROUGH THE PERIOD.
.FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: MODERATE
CONFIDENCE ON TIMING OF MVFR/IFR CONDITIONS THROUGH THE PERIOD.
-----------------------
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:/WWW.WEATHER.GOV/OTX/AVNDASHBOARD
PRELIMINARY POINT TEMPS/POPS
SPOKANE 32 40 34 40 32 41 / 100 30 50 80 80 30
COEUR D'ALENE 33 40 35 41 32 39 / 100 50 50 90 90 50
PULLMAN 33 41 36 44 34 40 / 100 60 60 70 90 70
LEWISTON 38 48 41 49 39 45 / 100 50 50 50 80 60
COLVILLE 26 40 28 39 23 40 / 90 0 40 90 80 20
SANDPOINT 30 39 31 39 29 37 / 90 50 50 90 90 50
KELLOGG 34 40 37 42 34 39 / 100 80 70 90 90 80
MOSES LAKE 33 42 36 42 31 44 / 90 10 60 80 60 10
WENATCHEE 32 41 36 40 34 43 / 90 10 70 80 60 10
OMAK 31 40 34 40 29 41 / 80 0 30 80 40 10
OTX WATCHES/WARNINGS/ADVISORIES
WA...WINTER WEATHER ADVISORY UNTIL 4 AM PST WEDNESDAY FOR CENTRAL
CHELAN COUNTY-WESTERN CHELAN COUNTY.
ID...WINTER WEATHER ADVISORY FROM 10 PM THIS EVENING TO 10 AM PST
WEDNESDAY FOR CENTRAL PANHANDLE MOUNTAINS.
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