FXUS66 KSEW 031026

AFDSEW



Area Forecast Discussion

National Weather Service Seattle WA

226 AM PST Tue Feb 3 2026



.SYNOPSIS...High pressure will build over the region Tuesday 

through the remainder of the week, bringing in unseasonably warm

and dry conditions with rounds of morning fog and low stratus. 

A pattern change is on tap for the weekend, with wet and cooler 

conditions returning.



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.SHORT TERM /TODAY THROUGH THURSDAY/...High pressure brings a

period of dry and mild weather to western WA through the

remainder of the work week. Expect highs in the mid to upper 50s

with 60s in the interior on Wednesday. Lows will be a little

cooler Thursday morning with 30s over the south sound. 33



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.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...Wet and cooler

weather returns over the weekend as the ridge shifts east and a

trough moves in from the west. Snow levels will lower to around

4000 feet on Sunday with accumulating snow possible on the

higher peaks and passes like Stevens Pass. Ensemble members 

favor a cool and wet pattern moving into next week for more 

lowland rain and mountain snow. 33



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.AVIATION...Increasing southwesterly flow aloft as an upper-

ridge builds. Low cigs this morning with a mix of MVFR/IFR. 

Patchy fog has been observed - leading to LIFR conditions for 

terminals such as KOLM/KPWT. This trend will continue into the 

morning before VFR returns around 18-21z. Though, fog may be 

slow to burn off in and around the Chehalis River Valley so KOLM

may struggle to improve. Mid to high level clouds will increase

by the evening - limiting low clouds and fog development 

overnight tonight. Widespread VFR will persist into Tuesday 

night but again, can't rule out patchy fog. Surface winds 

generally on the lighter side but KHQM will see easterly winds 

between 5-10 kt. 



KSEA...MVFR cigs will continue through the morning, with the stratus 

deck mainly ranging 015 to 025. IFR probabilities remain low - 

around 15%. Improvements to VFR cigs are expected later, mainly 

after 18z, although some brief improvements may occur as early as 12-

15z. Light SE winds will transition E/NE into Tuesday morning. VFR 

again Tuesday night into Wednesday as mid-high clouds prevail 

overhead. 



&&



.MARINE...A decaying system well offshore will bring seas back 

up to 10-12 feet later this evening into Wednesday. As a result,

a SCA has been issued again for the outer coastal waters. SCA 

level winds are also possible around this time - but mainly for 

the outer coastal waters where a 40-45% chance exists. 



As high pressure builds into today through the remainder of the work 

week, expect periods of marine fog over the next few days. 

Visibility restrictions in Puget Sound and the coastal waters are 

possible as fog and/or low stratus develops. Seas 10-12 ft through 

Thursday morning, before setting around 9-10 ft thereafter. 



&&



.HYDROLOGY...The Skokomish River will fall below flood stage

late this morning or early afternoon and will continue to

recede. The river will rise again early next week and crest 

near minor flood stage again. Flooding is not expected elsewhere

over the next 7 days. 33



&&



.SEW WATCHES/WARNINGS/ADVISORIES...

WA...None.

PZ...Small Craft Advisory from 4 PM this afternoon to 4 PM PST 

     Wednesday for Coastal Waters From Cape Flattery To James 

     Island 10 To 60 Nm-Coastal Waters From Cape Flattery To 

     James Island Out 10 Nm-Coastal Waters From James Island 

     To Point Grenville 10 To 60 Nm-Coastal Waters From James 

     Island To Point Grenville Out 10 Nm-Coastal Waters From 

     Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal 

     Waters From Point Grenville To Cape Shoalwater Out 10 Nm.



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