486
FXUS66 KOTX 081738
AFDOTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
1038 AM PDT TUE SEP 8 2026
KEY MESSAGES
- A WARMING AND DRYING TREND EXPECTED FOR TUESDAY THROUGH
THURSDAY.
- ANOTHER ROUND OF COOL SHOWERY CONDITIONS RETURN LATE WEEK FOR
FRIDAY AND THE WEEKEND.
SYNOPSIS
A WARMING AND DRYING TREND COMMENCES AROUND THE MIDDLE OF THE WEEK
AS HIGHER PRESSURE RETURNS TO THE REGION. INCOMING SYSTEM WILL BRING
ANOTHER ROUND OF WIDESPREAD PRECIP AND COOLER TEMPERATURES FOR THE
WEEKEND.
DISCUSSION
TODAY AND TONIGHT: IT WILL BE A TRANSITION PERIOD. A RIDGE WILL
BE NUDGING INTO THE REGION BEHIND THE EXITING LOW. IT WILL
PROMOTE A DRY ,WARMING TREND FROM WEST TO EAST THROUGH THE DAY.
NORTHEAST WA AND NORTH IDAHO PANHANDLE WILL HAVE LINGERING
SHOWER ACTIVITY THROUGH THE MID MORNING POTENTIALLY BRINGING
ANOTHER 0.1-0.2 OF PRECIP. ANY SHOWER ACTIVITY WILL DIMINISH BY
THE EARLY AFTERNOON. HIGHS WILL START A UPWARD TREND FROM
MONDAY. HIGHS FOR THE DAY WILL BE IN THE 70S. OVERNIGHT LOWS
WILL BE IN THE 40S TO LOW 50S.
WEDNESDAY AND THURSDAY: WINDS WILL BE MAIN CONCERN WEDNESDAY
AND THURSDAY. FOR WEDNESDAY, SOUTH TO NORTH WINDS WILL BRING
BREEZY CONDITIONS ACROSS THE WATERVILLE PLATEAU AND OKANOGAN
VALLEY. SUSTAINED WINDS WILL BE IN THE TEENS WITH GUSTS UP TO 25
MPH. THURSDAY WILL BEGIN THE BREAKDOWN OF THE STABLE PATTERN AS
A TROUGH BEGINS TO PRESS INTO THE REGION FROM BC/ALBERTA. IT
WILL BRING A TIGHTENING PRESSURE GRADIENT AND STRONGER WINDS.
FOR THURSDAY, WESTERLY WINDS SPREAD ACROSS THE BASIN WITH
SUSTAINED IN THE TEENS WITH GUSTS UP TO 30 MPH. LOCALLY HIGHER
WINDS ARE POSSIBLE OVER THE WATERVILLE PLATEAU WITH GUSTS UP TO
40 MPH. BLOWING DUST COULD BE A CONCERN IN THE AREA. OTHER
IMPACTS INCLUDE CHOPPY WATERS AND FIRE CONCERNS THAT MISSED ON
LAST WEEKENDS RAIN. THESE WILL BE THE WARMEST DAYS OF THE WEEK.
HIGHS WILL CLIMB BACK INTO THE UPPER 70S AND LOW 80S. OVERNIGHT
LOWS WILL BE IN THE UPPER 40S AND 50S ON WEDNESDAY NIGHT.
THURSDAY NIGHT WILL BE COOLER IN THE 40S. SHELTERED AREAS IN THE
NORTHERN VALLEYS COULD DIP INTO THE UPPER 30S.
FRIDAY AND SATURDAY: A LOW WILL PUSH THROUGH THE REGION AS THE
TROUGH CONTINUES TO DEEPEN OVER THE PACIFIC NORTHWEST. A WEAK
WAVE MOVES ACROSS THURSDAY NIGHT INTO FRIDAY, THEN THE LOW DIGS
DOWN THE COAST FRIDAY NIGHT INTO EARLY SATURDAY BEFORE SWINGING
INLAND SATURDAY AFTERNOON INTO SUNDAY. A FEW SHOWERS ARE
POSSIBLE AROUND THE MOUNTAINS WITH THE FIRST WAVE, BUT BETTER
CHANCES EXPAND OUT FRIDAY NIGHT INTO SATURDAY, BEFORE STARTING
TO RETREAT TO THE MOUNTAINS AND WANE SUNDAY INTO MONDAY. SOME
MODERATE RAINS ARE POSSIBLE AROUND THE MOUNTAIN ZONES SATURDAY,
WITH LIGHTER AMOUNTS ELSEWHERE. EMBEDDED T-STORMS ARE POSSIBLE
AND MAY PRODUCE LOCALLY HIGHER AMOUNTS. SATURDAY IS ALSO
FORECAST TO BE ANOTHER BREEZY DAY. TEMPERATURES COOL TO THE
UPPER 60S AND 70S FRIDAY, MOSTLY 60S AND LOCALIZED LOW 70S
SATURDAY, BEFORE MODERATING INTO SUNDAY AND MONDAY. LOWS WILL
CONTINUE TO BE IN THE 40S. SHELTERED AREAS IN THE NORTHERN
VALLEYS COULD DIP INTO THE UPPER 30S. /JDC
AVIATION
18Z TAFS: SHOWERS HAVE TAPERED OFF AND CONDITIONS HAVE IMPROVED
TO VFR FOR ALL SITES BUT KCOE WITH DRIER AIR MOVING INTO THE
REGION. CEILINGS AT KCOE ARE FORECAST TO IMPROVE TO VFR AS WELL
BY 19-20Z. VFR CONDITIONS WILL CONTINUE THROUGH THE AFTERNOON
AND EVENING, AND WINDS WILL BE LIGHTER TODAY WITH SPEEDS BELOW
10 KNOTS.
FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: HIGH CONFIDENCE
FOR VFR 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:/WWW.WEATHER.GOV/OTX/AVNDASHBOARD
PRELIMINARY POINT TEMPS/POPS
SPOKANE 48 78 55 77 47 69 / 0 0 0 0 20 0
COEUR D'ALENE 47 77 51 75 47 68 / 0 0 0 0 30 10
PULLMAN 45 77 50 76 45 66 / 0 0 0 0 20 0
LEWISTON 50 83 55 85 54 74 / 0 0 0 0 30 0
COLVILLE 44 78 48 78 44 72 / 0 0 10 10 10 0
SANDPOINT 46 74 50 74 45 64 / 0 0 0 10 30 30
KELLOGG 45 74 50 73 44 64 / 0 0 0 0 50 10
MOSES LAKE 47 82 54 82 50 74 / 0 0 0 0 0 0
WENATCHEE 55 83 62 80 52 73 / 0 0 0 0 0 0
OMAK 51 81 57 80 49 74 / 0 0 0 0 0 0
OTX WATCHES/WARNINGS/ADVISORIES
WA...NONE.
ID...NONE.
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