Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
757
FXUS66 KSEW 241615
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
915 AM PDT Fri Jul 24 2026
.SYNOPSIS...
An upper-level trough offshore will push inland over the
weekend, bringing cooler temperatures to the area and additional
chances of showers. Troughing will persist through early next
week, allowing for temperatures to trend just below to near
normal with continued PoPs. Drier conditions favored midweek
onward.
&&
.SHORT TERM /TODAY THROUGH SUNDAY/...
The upper-level pattern can be characterized by an upper-low
over the NE PAC and stout ridging centered over the SW US. At
the surface, low-level onshore flow is ongoing across W WA with
marine stratus this morning. Satellite imagery already indicates
some scattering across portions of SW WA this morning, which
will further allow the stratus to retreat back to the coast
by this afternoon with help of diurnal heating. Today, subtle
ridging is amplifying across the region, bringing a brief spell
of above average temperatures. Interior highs are forecast to
range between the upper 70s to mid 80s. Coastal areas of course
cooler in the lower to mid 60s. Dry conditions again tonight but
the aforementioned upper-low will begin to show signs of
progression as it becomes ingested within the mean flow. Marine
stratus on track to redevelop overnight into Saturday morning
under continued onshore flow. Min temperatures will fall between
the lower to upper 50s.
The upper-low will finally move inland on Saturday as PoPs
return into the forecast, primarily over the coast and mountain
areas. Models have rain showers straggling into Sunday as well
as upper-troughing becomes the main influence across W WA.
This pattern favored onshore flow as reoccurring spells of
marine stratus and slightly below-normal temps trend throughout
the weekend with highs 70s.
41/62
&&
.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
Looking forward into next week, upper level troughing remains
the dominant influence across the area as several systems move
down from the Gulf of Alaska. Some model solutions show the
upper level high over the Four Corners region retrograding
westward, which may allow conditions to trend drier and warmer towards
the second half of the week. Otherwise temperatures generally
remain around climatological normals.
41
&&
.AVIATION...
Southwest flow aloft is expected over Western Washington today with
an upper ridge centered east of the region and an upper trough
offshore. The low level flow is onshore and will increase today.
Widespread IFR/LIFR stratus across much of the lowlands will burn
back toward the immediate coastline by early this afternoon. MVFR
ceilings will develop most areas west of the Cascades overnight into
Saturday morning.
KSEA...IFR/LIFR stratus will lift and scatter toward 18Z. Increasing
onshore flow will lead to a deeper marine layer tonight into
Saturday morning with MVFR ceilings persisting into at least mid-
afternoon Saturday. Surface winds W/SW rising to 7 to 10 knots
becoming southerly tonight. 27
&&
.MARINE...
Low level onshore flow continues today with strongest
winds through the central/east Strait of Juan de Fuca - a Small
Craft Advisory is in effect. A frontal system will stall
offshore on Saturday then shift inland late Sunday. Another
front will cross the waters on Tuesday. 33
&&
.FIRE WEATHER...
More benign fire weather conditions expected today through early
next week. The low offshore will finally make its way over the
region. This will result increased onshore flow with cooler
temperatures and shower chances through the weekend into the
first part of next week easing fire weather concerns. Additional
thunderstorms are not likely but can`t be ruled out at this
time.
41
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory from 5 PM this afternoon to 5 AM PDT
Saturday 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