657
FXUS66 KOTX 010600
AFDOTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
1100 PM PDT WED SEP 30 2026
KEY MESSAGES
- SHELTERED NORTHERN VALLEYS WILL SEE LOW TEMPERATURES IN THE
MID 30S EACH MORNING THROUGH FRIDAY, LEADING TO ISOLATED AREAS
OF FROST DEVELOPMENT.
- TEMPERATURES GRADUALLY TREND WARMER THROUGH THE REST
OF THE WEEK AND INTO THE WEEKEND. AFTERNOON HIGHS PEAK IN THE
70S AND LOW 80S SATURDAY THROUGH MONDAY.
- MAINLY DRY CONDITIONS ARE FORECAST WITH THE EXCEPTION OF
SHOWER CHANCES FOR THE NORTH CASCADES THURSDAY AND FRIDAY.
SYNOPSIS
TEMPERATURES WILL TREND WARMER THROUGH THE END OF THE WEEK,
RISING INTO THE 70S AND LOW 80S BY THE WEEKEND. CONDITIONS ARE
LOOKING BENIGN THROUGH THE FIRST WEEK OF OCTOBER WITH MAINLY DRY
CONDITIONS AND LIGHT WINDS.
DISCUSSION
THURSDAY THROUGH FRIDAY: THE REGION IS UNDER A ZONAL FLOW
PATTERN WITH A STRENGTHENING RIDGE OVER THE SOUTHWEST CONUS AND
A DEVELOPING GULF OF ALASKA LOW. A WEAK WAVE WILL PASS THROUGH
THE REGION TODAY BUT IS ONLY EXPECTED TO BRING ISOLATED SHOWERS
FOR THE CASCADES AND NORTHERN MOUNTAINS. IT WILL NOT BRING MUCH
IN THE WAY OF PRECIP AS PROBABILITY OF MORE THAN A HUNDREDTH ARE
AT MOST 20%. WINDS WILL BE LIGHT. TEMPERATURES WILL CONTINUE TO
WARM THROUGH THE PERIOD. HIGHS WILL BE IN THE 70S TO LOW 80S.
CLEAR SKY AND DRY AIR WILL ALLOW FOR LOWS TO DIP INTO THE MID
30S FOR THE NORTHERN VALLEYS. THE RANGE OF LOWS WILL BE MID 30S
TO 40S.
SATURDAY THROUGH WEDNESDAY: THE RIDGE WILL BUILD INTO THE
PACIFIC NORTHWEST BEHIND THE WEAK WAVE. IT WILL CONTINUE THE
DRY, WARMING TREND THROUGH THE END OF THE PERIOD. WEAK WAVES
WILL CONTINUE TO PASS THROUGH THE REGION BUT ARE NOT EXPECTED TO
BRING MUCH IN THE WAY OF PRECIP. IT WILL BRING A BRIEF COOL
DOWN FROM THE WEEKEND. NEARLY 80% OF ENSEMBLES AGREE WITH THIS
PATTERN. THE OTHER 20% FLATTEN THE RIDGE WITH A STRONGER LONG
WAVE TROUGH PRESSING INTO THE REGION ON TUESDAY. THE DRY, WARM
CONDITIONS RETURN THROUGH THE END OF THE WEEK. HIGHS WILL BE IN
THE 70S AND LOW 80S. LOWS WILL BE IN THE UPPER 30S AND LOW 50S.
OVERNIGHT LOWS LOOKING AHEAD, NEXT WEEKEND IS SHOWING SIGNS OF
BEING COOLER WITH INCREASED SHOWER CHANCES. /JDC
AVIATION
06Z TAFS: VFR CONDITIONS CONTINUE THROUGH THE PERIOD. ANOTHER
PUSH OF MID AND HIGH LEVEL CLOUDS ARRIVES TONIGHT INTO THURSDAY
MORNING, THOUGH CONDITIONS WILL REMAIN VFR. WINDS WILL BE LESS
THAN 10KT THROUGH THE PERIOD.
FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: HIGH CONFIDENCE
FOR VFR 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 42 68 45 74 45 74 / 0 0 0 0 0 0
COEUR D'ALENE 44 67 44 72 45 74 / 0 0 0 0 0 0
PULLMAN 44 69 45 73 46 76 / 0 0 0 0 0 0
LEWISTON 50 73 51 79 51 79 / 0 0 0 0 0 0
COLVILLE 35 68 38 73 38 76 / 0 0 10 0 0 0
SANDPOINT 40 65 41 69 41 71 / 0 0 10 0 0 0
KELLOGG 43 67 46 71 45 73 / 0 0 0 0 0 0
MOSES LAKE 44 73 45 77 45 78 / 0 0 0 0 0 0
WENATCHEE 51 71 52 77 53 75 / 0 0 0 0 0 0
OMAK 42 70 43 75 45 76 / 0 10 0 0 0 0
OTX WATCHES/WARNINGS/ADVISORIES
WA...NONE.
ID...NONE.
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