428
FXUS66 KOTX 181730
AFDOTX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
1030 AM PDT SUN OCT 18 2026
KEY MESSAGES
- DRY WEATHER CONTINUES THROUGH AT LEAST THE MIDDLE OF NEXT WEEK
WITH MILD AFTERNOON TEMPERATURES.
- BREEZY WINDS DOWN THE OKANOGAN VALLEY ON TUESDAY.
- COOLER WEATHER WITH INCREASED PRECIPITATION CHANCES ARRIVE
LATE NEXT WEEK.
SYNOPSIS
DRY WEATHER IS EXPECTED SUNDAY INTO WEDNESDAY, WITH VARIABLE
CLOUD COVER AND MILD TEMPERATURES. COOLER WEATHER AND INCREASING
PRECIPITATION CHANCES ARRIVE LATE IN THE WEEK.
DISCUSSION
TODAY THROUGH WEDNESDAY: A SHALLOW RIDGE WILL BRIEFLY BE OVER
THE REGION TODAY. STARTING ON MONDAY, A TROUGH WILL BE DIGGING A
LOW ALONG TO COAST INTO CALIFORNIA. THE LOW BECOMES CUTOFF AND
A SPLIT FLOW PATTERN DEVELOPS OVER THE NORTHWEST. IT WILL BRING
DRY, WARM PATTERN OVER THE INLAND NORTHWEST. PRECIP CHANCES
ACROSS THE REGION REMAIN NEAR 0 PERCENT THROUGH WEDNESDAY. THE
REGION CAN EXPECT WARM DAYTIME AND COLD OVERNIGHT CONDITIONS.
WINDS WILL BE GENERALLY CALM EXCEPT A BRIEF PERIOD OF BREEZY
WINDS DOWN THE OKANOGAN VALLEY ON TUESDAY WITH GUSTS INTO THE
UPPER 20 MPH RANGE. SUNDAY HIGHS WILL BE 50S AND LOW 60S AND
SLIGHTLY INCREASE THROUGH MIDWEEK INTO THE 60S. OVERNIGHT LOWS
WILL BE IN THE UPPER 20S AND 30S. OVERNIGHT PATCHY FROST COULD
IMPACT ANY REMAINING GARDENS AND SENSITIVE SEASONAL PLANTS.
THURSDAY THROUGH SATURDAY: THE LOW FINALLY EJECTS NORTHEAST AS
A TROUGH MOVES INTO THE PACIFIC NORTHWEST. A SOUTHWEST FLOW
PATTERN WILL PUSH MOISTURE INTO THE REGION AND BRING INCREASING
PRECIP CHANCES LATE WEDNESDAY THROUGH THE SATURDAY. ENSEMBLES
HAVE INCREASED PRECIP CHANCES ACROSS THE REGION WITH A 10
PERCENT PROBABILITY OF AT LEAST A HUNDREDTH BY FRIDAY. FOR A
TENTH OF AN INCH, THE CASCADE CREST, EXTREME EASTERN WASHINGTON,
THE IDAHO PANHANDLE WITH AT LEAST A 20 PERCENT PROBABILITY.
SNOW LEVELS DROPPING DOWN TO AROUND 5,000 FEET THURSDAY NIGHT.
THE REGION WILL BE UNDER A MOIST TROUGH PATTERN THROUGH THE REST
OF THE WEEKEND. SHOWER CHANCES ARE EXPECTED TO CONTINUE INTO
THE START OF THE WORK WEEK. HIGHS WILL BE IN THE 50S TO LOW 60S.
OVERNIGHT LOWS WILL BE IN THE UPPER 20S AND 30S. /JDC
AVIATION
18Z TAFS: VFR CONDITIONS WITH LIGHT WINDS UNDER 10 KTS
REGIONWIDE. HIGH CLOUDS WILL INCREASE THIS EVENING WITH A BROKEN
TO OVERCAST CIRROSTRATUS DECK DEVELOPING OVERNIGHT INTO MONDAY
MORNING.
FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: HIGH CONFIDENCE
IN VFR CONDITIONS. /SVH
-----------------------
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 35 62 39 60 39 65 / 0 0 0 0 0 0
COEUR D'ALENE 35 62 39 61 39 64 / 0 0 0 0 0 0
PULLMAN 36 63 38 59 36 63 / 0 0 0 0 0 0
LEWISTON 41 67 42 65 42 65 / 0 0 0 0 0 0
COLVILLE 29 63 31 61 32 66 / 0 0 0 0 0 0
SANDPOINT 32 60 37 61 36 64 / 0 0 0 0 0 0
KELLOGG 36 61 39 63 40 64 / 0 0 0 0 0 0
MOSES LAKE 32 64 37 62 36 67 / 0 0 0 0 0 0
WENATCHEE 36 62 43 62 44 67 / 0 0 0 0 0 0
OMAK 33 63 38 63 38 66 / 0 0 0 0 0 0
OTX WATCHES/WARNINGS/ADVISORIES
WA...NONE.
ID...NONE.
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