001
FXUS66 KSEW 281729
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
929 AM PST Fri Nov 28 2025

.SYNOPSIS...
Showers have largely tapered off as low pressure system exits
the area and high pressure builds into the region in its wake.
An overall cooler and drier trend will continue into next week,
though a few weak disturbances moving across the area may bring
some additional shower chances on Saturday and Monday night. A
stronger system may approach western Washington late next week.

&&

.SHORT TERM /TODAY THROUGH SUNDAY/...
Some breezy northeasterly winds will continue this morning in
western Whatcom county before tapering off in the early
afternoon. Gusts have gotten to 25 mph in Bellingham thus far. Conditions
will then dry out through the day as high pressure starts to
build over the northeastern Pacific. Clearing will make way for
some sun and afternoon highs will climb into the low to mid 50s.
The rest of the previous discussion can be found below.


Northwesterly flow aloft will persist over the region through
the weekend as a ridge of high pressure amplifies over the
northeastern Pacific. A weak disturbance riding the periphery
of the ridge looks to move across the area on Saturday and looks
to primarily increase cloud cover across the area, though could
see some light rain for portions of western Washington. Temperatures
will cool, with afternoon highs expected to be in the mid to
upper 40s across the interior and low 50s along the coast.
Overnight lows will be in the mid to upper 30s on Saturday and
will fall to the low to mid 30s on Sunday morning.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
Cool and dry conditions will persist Sunday night and will make
for a chilly start to Monday morning, with overnight lows expected
to be in the low to mid 30s across the interior and upper 30s
along the coast. Ensembles remain in decent agreement over another
disturbance moving into the area Monday night into Tuesday under
the northwesterly flow aloft. At this time, the system does not
look to be very impactful to the area and mainly and looks bring
light rain to the lowlands and light snow to the mountains. The
ridge of high pressure then looks to briefly rebound over the
northeastern Pacific near midweek, positioning the storm track
more towards British Columbia. A more substantial system looks
to move into British Columbia around midweek and may then sink
southward into the area by Thursday as the ridge over the
Pacific starts to weaken.

14

&&

.AVIATION...
High pressure will keep the skies mostly clear throughout the day
today, with widespread VFR conditions expected. Surface winds will
be out of the north to northeast, with gusts up to 25 kts through
the morning expected at KBLI before tapering off in the afternoon.
The forecast challenge late tonight into early tomorrow morning
becomes about fog potential. Given the recent moisture, it is still
possible, but continued northeasterly to easterly flow will act to
dry out the surface and limit fog development. For now, the TAFs for
the terminals susceptible to fog such as OLM and PWT have fog and/or
lower stratus in them toward the end of the period, but this will be
monitored and adjusted in future updates.

KSEA...Continued clearing at the terminal can be expected this
morning with northeasterly flow. Surface wind speeds will be at 7
kts to 12 kts until around 01Z before easing to 5-6 kts, remaining
NE throughout the period. The potential for fog/stratus tomorrow
morning given recent rainfall is not totally eliminated, but
increasingly unlikely under continued northeasterly flow acting to
dry out the surface layer. That potential is written in the TAF
around 13Z tomorrow, but will be updated as more guidance arrives.

21

&&

.MARINE...
Easterly/northeasterly offshore winds developing across the waters
this morning with building high pressure over the area. Have
maintained advisories into the afternoon for many locations
including the northern interior waters and adjacent eastern Strait
of Juan de Fuca and the west entrance of the Strait and adjacent
coastal waters where winds to 35 kt are expected to continue through
the afternoon. Have also maintained the advisory for the southern
coastal waters as offshore winds will continue to develop from Grays
Harbor and extending offshore; this area is more marginal though,
and winds likely diminish late this morning in this area. Seas
remain rather steep but below advisory criteria over the coastal
waters. A weak disturbance Saturday won`t do much to impact the
marine conditions, but seas build closer to 10 ft around Monday.
12

&&

.HYDROLOGY...
With precipitation ending over the basin, the Skokomish River
in Mason County has started to crest this morning and will
continue to subside over the next few days with no additional
significant precipitation expected. Flooding is not expected
over the next seven days as the weather pattern across western
Washington trends cooler and generally drier over the next
several days.

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory until 2 PM PST this afternoon 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 Point Grenville To Cape Shoalwater
     10 To 60 Nm-Coastal Waters From Point Grenville To Cape
     Shoalwater Out 10 Nm-Grays Harbor Bar-West Entrance U.S.
     Waters Strait Of Juan De Fuca.

     Small Craft Advisory until 4 PM PST this afternoon for East
     Entrance U.S. Waters Strait Of Juan De Fuca-Northern
     Inland Waters Including The San Juan Islands.

&&

$$