Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
425
FXUS66 KSEW 110435
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
835 PM PST Tue Feb 10 2026
.SYNOPSIS...
Dry conditions will persist through early Thursday as an upper level
ridge builds over Western Washington, bringing the chance for
morning fog or low stratus. The ridge will weaken late Thursday as
the next frontal system arrives, bringing lowland rain and mountain
snow. Unsettled and cooler conditions continue into the weekend,
with additional systems expected to move over the region.
&&
.SHORT TERM /TONIGHT THROUGH THURSDAY NIGHT/...
Satellite shows mostly clear skies across the area this evening,
with some spots of fog developing across portions of the
southern Sound. Expect the extent of morning fog/low clouds to
expand heading into early Wednesday as a weak upper level ridge
settles over western Washington. Improvement is expected by late
morning or early afternoon to mostly clear skies with high
temperatures in the upper 40s to low 50s. The upper level ridge
will begin to flatten Thursday evening as the next frontal
system approaches. With the ridge still in place Thursday
morning, another round of fog/low clouds is likely. Cloud cover
will increase inland Thursday afternoon as the frontal system
arrives to the coastline. 29/14
&&
.LONG TERM /FRIDAY THROUGH TUESDAY/...
The aforementioned frontal system will continue into Friday bringing
widespread lowland rain and mountain snow. There is good agreement
between ensembles that the weather pattern will remain unsettled
into the weekend and into early next week. In addition, model
guidance continues to highlight an upper level trough digging
southwards into California on Sunday, opening the opportunity for a
colder air mass to settle over Western Washington through Tuesday.
This may bring the potential for snow to mix with rain at the lower
elevations during the overnight hours. However, at this time no
accumulation is expected for the lowlands given that PoPs will be
generally less than 30% and QPF amounts are less than 0.05
inches. 29
&&
.AVIATION...Weak high pressure will nudge inland tonight and
Wednesday for dry and stable conditions. The flow aloft is westerly,
becoming northerly on Wednesday morning. Surface winds will be NNE
through the TAF period. Low clouds and fog will redevelop overnight
and mainly impact areas around the south sound. Low clouds and fog
will dissipate by 18-20Z with VFR conditions expected. 33/21
KSEA...N winds 8-12kt with VFR conditions overnight. Patchy low
clouds in the vicinity 12-16Z becoming clear thereafter. 33/21
&&
.MARINE...High pressure will continue building over area waters
through Thursday morning, bringing calm marine conditions. A front
will move over the waters late Thursday into Friday, with additional
systems possible into the weekend and early next week.
Seas 7 to 8 ft this afternoon will continue decreasing to 5 to 6 ft
by Wednesday and begin to rise Thursday afternoon, building as high
as 13-17 ft early Friday morning. Seas will gradually decrease
Friday evening, hovering between 8 to 10 ft through early next week.
29
&&
.HYDROLOGY...
River flooding is not expected during the next seven days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion