Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
367
FXUS66 KSEW 021555
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
855 AM PDT Thu Apr 2 2026
.SYNOPSIS...
Upper level low over the area will move east today. Weak upper
level ridge trying to build tonight and Friday with a system
moving by to the north Friday. Upper level ridge strengthening
Friday night and remaining in place into early next week. Upper
level trough moving by to the north Tuesday with an upper level
low approaching the Oregon coast.
&&
.SHORT TERM /TODAY THROUGH SATURDAY/...
The latest forecast remains on track this morning with no
updates. Upper level low slowly moving east today. Moisture
wrapping around the low moving into Western Washington keeping
showers in the forecast. Snow levels 2500 to 3000 feet for snow
in all the passes except Snoqualmie. An additional 4 to 8 inches
of snow possible today in the Cascades with most of the snow
coming in the morning. The advisory will remain in effect
through 11 am. Convergence zone over Island County will drift
east and dissipate this morning. Highs in the lower to mid 50s.
Low well to the east tonight with the upper level flow becoming
northwesterly. Upper level ridge trying to build into the area.
Showers coming to an end in the lowlands but lingering in the
mountains in the evening hours. Plenty of moisture left over
Western Washington keeping skies mostly cloudy. This will
prevent lows from getting too cold Friday morning. The colder
locations will be in the mid 30s while a majority of the area
will be a couple of degrees either side of 40.
Weak system riding over the flat upper level ridge Friday for a
chance of showers along the coast and over the northern
portions. Mostly cloudy for the remainder of the area. Highs
warming up getting closer to normal, in the mid 50s.
Upper level ridge strengthening Friday night and Saturday with
the ridge axis right along the coast. Clearing skies will allow
temperatures to drop into the 30s Saturday morning. Warming
trend continuing with highs in the upper 50s to mid 60s.
Felton
&&
.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
Upper level ridge remaining over Western Washington into Monday.
Low level offshore flow Sunday becoming light Monday. Trough
riding by to the north Tuesday with an upper level low
approaching the Oregon coast from the southwest. Slight chance
moisture spinning out of this low makes it to Western
Washington. A little bit better chance of showers Wednesday as
the low moves closer to the coast.
Warming trend through the weekend peaking Monday with highs in
the 60s and lower 70s. The forecast high of 67 degrees Monday in
Seattle would be the warmest day since October 7th. Highs
cooling Tuesday and Wednesday back mostly into the mid and
upper 50s. Lows in the lower to mid 40s cooling to the mid 30s
to lower 40s Wednesday morning.
&&
.AVIATION...
An upper level trough will shift east of the region today with north
to northwest flow aloft over Western Washington as weak upper level
ridging offshore begins to rebuild into the area late today. Low
level onshore flow will lead to some convergence zone activity into
midday. Widespread MVFR ceilings and pockets of IFR are expected to
gradually lift to low end VFR late this afternoon into the evening
for most areas. Residual low level moisture will lead to areas of
MVFR ceilings across the region again on Friday morning.
KSEA...MVFR ceilings are expected to persist through at least 22Z
with some limited improvement thereafter to low end VFR thresholds
between 035-050. Surface winds S/SW 8 to 12 knots.
27
&&
.MARINE...
Onshore low will gradually relax tonight as surface ridging over the
coastal and offshore waters shifts into the interior of Western
Washington. A weak front will clip the coastal waters on Friday, but
is not expected to generate much in the way of impacts. A ridge will
strengthen over area waters over the weekend with the flow turning
northerly or weakly offshore as thermally induced low pressure
expands northward along the Oregon coast. Onshore flow returns early
next week as another frontal system passes north of the waters. This
may generate a strong westerly push in the Strait of Juan de Fuca
Monday night into Tuesday.
Seas will straddle the 10 foot mark today before subsiding back into
single digits Friday into the early portion of next week.
27
&&
.HYDROLOGY...
No river flooding in the next 7 days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...Winter Weather Advisory until 11 AM PDT this morning for
Cascades of Pierce and Lewis Counties-Cascades of
Snohomish and Northern King Counties-Cascades of Southern
King County-Cascades of Whatcom and Skagit Counties.
PZ...Small Craft Advisory until 5 PM PDT 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 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-Grays Harbor Bar.
Small Craft Advisory until 11 AM PDT this morning for Central
U.S. Waters Strait Of Juan De Fuca-East Entrance U.S.
Waters Strait Of Juan De Fuca.
&&
$$
NWS SEW Office Area Forecast Discussion