Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
190
FXUS66 KSEW 251552
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
852 AM PDT Sat Jul 25 2026
.SYNOPSIS...
An upper-level trough offshore will push inland today. A weak
front will follow the trough Sunday into Sunday night. Temporary
high pressure Monday before another weak front arrives Tuesday.
Dry and warmer weather Wednesday into next weekend as an upper
level ridge centered over the southwest builds back towards the
Pacific Northwest.
&&
.SHORT TERM /TODAY THROUGH MONDAY/...
Clouds are continuing to work their way inland this morning and
fill in across the area. Breaks of sun and clouds remain on
track for the forecast today. See below for an update to the
aviation section. 62
Upper level trough offshore moving through Western Washington
later this morning into the afternoon hours. Best chances for
showers along the coast and over the Northwest Interior. Marine
layer filling in over the rest of the lowlands by mid morning.
Trough moving through will keep the layer intact this afternoon
making for a mostly cloudy day. Temperatures well below normal
with highs in the mid 60s to mid 70s.
Another upper level trough digging south offshore tonight.
Front associated with the trough stalling offshore as the flow
aloft becomes more parallel to the front. Rain developing along
the North Coast with a chance of rain west of Puget Sound.
Under at least mostly cloudy skies lows in the 50s and lower
60s.
Another day of much below normal temperatures Sunday as the
frontal system moves slowly eastward. Rain over the Olympic
Peninsula and the coast with rain likely for the Northwest
Interior. Mostly cloudy to cloudy skies elsewhere. Highs only in
the mid 60s to lower 70s.
Front weakening and moving through Sunday night with a chance of
rain or better from about Chehalis northward. Lows in the 50s.
Another weak trough digging offshore Sunday night into Monday.
This one a little further offshore allowing a weak upper level
ridge to try an build over Western Washington. Chance of showers
west of Puget Sound. With the upper level ridge temperatures
warming a little with highs in the 70s over the interior. Under
mostly cloudy skies high temperatures along the coast in the mid
and upper 60s. Lows Monday morning in the 50s. Felton
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
One more weak weather system moving through Tuesday ( is it
really the last week of July? ) for another chance of rain.
Highs upper 60s to mid 70s inland and mid 60s coast.
Upper level ridge centered over the Desert Southwest will
begin building towards the Pacific Northwest Tuesday night.
Ridge continuing to slowly build and by Friday 500 mb heights in
the mid to upper 580 dms. Low level flow remain onshore
Wednesday through Friday keeping temperatures from getting too
warm. Highs in the 70s Wednesday warming to the mid 70s to mid
80s Thursday and Friday for the interior. Highs along the coast
in the mid 60s Wednesday, near 70 Thursday and Friday.
Is the current streak of Julys with above normal temperatures
in Seattle ( currently at 13 ) over? Through the 24th the
average temperature for the month is 66.9 degrees, only 0.2
degrees above normal. Current forecast temperatures for the next
week put the July average temperature at 66.9 degrees by the
end of the month. Normal for the month of July is 67.1 degrees.
The last time Seattle had an average monthly temperature in July
below 67.0 degrees was 2016 with 66.8 degrees ( the 1981-2010
normal for July was 65.7 degrees so this was still an above
normal month ). It`s going to be close. Felton
&&
.AVIATION...
Southwest flow continues aloft with an upper level trough moving
into the Pacific Northwest. This is producing a mixed bag of
ceilings that straddle MVFR thresholds. Mostly VFR ceilings are
expected for interior areas this afternoon with MVFR persisting near
the coast with occasional light showers. Deeper moisture with a
frontal boundary arrives on Sunday with low MVFR or occasional IFR
in stratiform precipitation developing along the coast and interior
areas from around KPAE northward. There`s moderate confidence that
ceilings for central/south sound terminals will drop to high end
MVFR at times mid-late Sunday morning.
KSEA...MVFR ceilings are expected to lift to VFR by around 21z. VFR
ceilings continue into Sunday morning, but recent guidance
confidence is tipping the balance toward a period of high end MVFR
ceilings developing 12Z-20Z Sunday. Surface winds S/SW 5 to 8 knots
except 9 to 13 knots 21z-03z.
27
&&
.MARINE...
A stalled front offshore today will move inland Sunday into
Sunday night. High pressure behind the front Monday. Another
front will move into the area waters Tuesday with high pressure
again building in behind the front Tuesday night and Wednesday.
Small craft advisory winds over the coastal waters today easing
tonight. Diurnal westerly pushes through the Strait of Juan de
Fuca in the evenings in the middle of next week could produce
small craft advisory winds. Felton
&&
.FIRE WEATHER...
Fire weather concerns relaxing the next few days with chances
for precipitation over the weekend and again Tuesday. Good
chance of wetting rains along the north coast and the west
slopes of the Olympics Sunday and Sunday night. Dry and warmer
conditions beginning the middle of next week. Low level flow
remaining onshore for good relative humidity recoveries in the
overnight hours. Felton
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
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.
&&
$$
NWS SEW Office Area Forecast Discussion