Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
433
FXUS66 KSEW 302115
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
215 PM PDT Thu Jul 30 2026
.SYNOPSIS...High pressure will lead to warmer weather on Friday.
A system will track through western Washington on Saturday for
cooler, wetter and windier conditions. A ridge will bring warmer
and drier conditions early next week.
&&
.SHORT TERM /TONIGHT THROUGH SATURDAY NIGHT/...There is
weak upper level troughing over the region with ongoing
low level onshore flow. The result is near-normal conditions
with highs in the 60s and 70s. A system will spin off B.C. on
Friday with a front stalling offshore. The air mass will be a
little warmer with weak ridging over the Northwest. Interior
lowland temperatures will reach the low to mid 80s with 60s and
70s along the coast.
Saturdays weather will be cooler, cloudier and wetter as the
front and upper low track inland. Highest chances for wetting
rain will be over the north coast and north Cascades. There is
also a slight chance of thunderstorms in the north Cascades
Saturday afternoon. Winds will be breezy too with S/SW gusts to
20-30 MPH across most lowland areas (winds peaking during the
afternoon). Showers with a convergence zone will be focused over
Snohomish County Saturday afternoon and may linger into late
Saturday night. 33
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...The upper level departs
to the N/NE on Sunday with weak troughing left over WA. We`ll
remain cooler than average with highs in the 60s to lower 70s.
It will be drier, though, with just a few light showers noted
over the Olympics and northern Cascades.
High pressure builds early next week for warmer and drier
conditions. The flow will turn offshore as a thermal trough
forms along the coast. Expect a rise in temperatures with
interior lowland areas seeing the 80s to lower 90s. Overnight
lows will be mostly in the 50s. This will result in widespread
Minor Heat Risk with pockets of Moderate Heat Risk across the
south interior (away from the water). 33
&&
.AVIATION...Southwest flow aloft continues into Friday with an upper
trough offshore and upper ridge over the interior West. The low
level flow is light onshore. Areas of IFR/LIFR stratus will
redevelop overnight along the immediate coast, otherwise VFR
conditions will prevail.
KSEA...Mostly clear skies. Surface winds W/SW 7 knots or less
veering northerly this evening, then becoming W/NW Friday afternoon.
27
&&
.MARINE...High pressure will remain over the waters through Friday.
Another weak system will reach the waters Friday night and Saturday.
High pressure will rebuild over the coastal waters Sunday and remain
in place through Monday.
Small craft advisory strength westerlies are likely in the
central/east strait Friday evening becoming gale force late Saturday
afternoon into Saturday evening.
27
&&
.FIRE WEATHER...Drier and warmer conditions are forecast for
Friday due to weak upper level ridging. Daytime min humidities
will dip into the 30s across the Black Hills and SW Interior
lowlands, SE Puget Sound lowlands, and Cascade valleys.
A system on Saturday will bring wetting rain to the north coast
and north Cascades (with a chance of thunderstorms). It will be
windy with gusts near the crest in the 30-40 MPH range.
However, with the wetter and cooler conditions, min RHs will not
reach critical thresholds.
Warmer and drier weather early next week will keep the fire
weather threat elevated, especially next Tuesday and Wednesday,
where min RHs will dip into the 20s and 30s again. 33
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion