Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
660
FXUS66 KSEW 281734
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
934 AM PST Sat Feb 28 2026
.SYNOPSIS...
Drier conditions will emerge over the weekend as upper-ridging
builds into the region. The trend will last to start the work
week but won`t persist. The next weather system arrives by the
middle of next week with lowland rain and mountain snow.
&&
.SHORT TERM /TODAY THROUGH MONDAY/...
Surface high pressure over W WA leading to mostly calm winds
observed so far this morning. As a result, patchy morning fog
is developing with most of the coverage expected over the
Chehalis River valley. For today, we`ll begin to see pattern
progression as an upper low well offshore gently tracks
eastward. The aforementioned low center is becoming ingested
into the mean- flow before looming just off the CA/OR coast on
Sunday with upper-level ridging over the Gulf of Alaska. Slight
PoPs may sneak their way into SW WA on Sunday however,
conditions are slated to remain mostly dry and trend that way
into Monday as the ridge axis begins to position overhead. High
temperatures are to top out in the upper 40s to near 50 F with
overnight lows cooling into the 30s each night.
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
An upper-ridge continues over the PNW on Monday night. The next
front looks to arrive by Tuesday evening with a chance of
widespread lowland rain and mountain snow. Afterwards,
conditions are forecast to remain active into Friday. At this
time, the potential for significant weather hazards appears low
and the precipitation looks primarily beneficial for the region,
adding some much needed snow to the snowpack in the mountains.
That said, given a weak favoring of above normal temperatures,
snow levels may limit the overall additions.
41
&&
.AVIATION...
West to northwest flow aloft will continue through today with
weak upper ridging centered offshore. Low-end VFR cigs continue
early this morning, with localized MVFR especially around Puget
Sound, and some clearing elsewhere. There are a couple pockets
of LIFR/IFR conditions at KOLM and KPAE that are trending
upwards this morning. Once low clouds clear this morning, high
clouds are expected everywhere through the day (with the
exception being around KCLM where MVFR cigs may exist early this
afternoon). Light winds this morning will increase from the
north and range 5 to 12 kts this afternoon. Tomorrow morning
currently favors low stratus in most of the interior, with the
best chance of fog/mist in the south interior.
KSEA...Low-end VFR cigs continue this morning. They will scatter for
high clouds during the afternoon. Light winds will increase from the
NE around 12z, and north winds will further increase in the
afternoon, ranging between 7 to 12 kts later today. There is a
slight chance of MVFR Sunday morning from 12Z to 17Z. JD/HPR
&&
.MARINE...
A surface ridge will settle over the interior portions of
British Columbia today. Winds will increase from the north today,
with a northerly to weakly offshore component through this weekend.
Winds are generally expected to remain below SCA criteria, although
a few gusts over the outer Coastal Waters may reach 20 kts this
afternoon through tonight. The next frontal system will move into
the waters Tuesday into Wednesday for the return of increased
southerly winds and potential headlines.
Seas of 7 to 9 feet will slowly subside to 4 to 6 feet tonight
through Sunday. Seas will range 3 to 5 feet on Monday before
building again Tuesday. JD
&&
.HYDROLOGY...
No river flooding is expected during the next seven days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion