Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
126
FXUS66 KSEW 300342
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
842 PM PDT Wed Jul 29 2026
.SYNOPSIS...
Dry and mild weather prevails through Thursday with warmer
temperatures on Friday. The next disturbance shifts over the
area late Friday through Saturday, bringing cooler and cloudy
conditions along with showers and thunderstorms. High pressure
returns early next week, bringing back dry and warmer conditions.
&&
.SHORT TERM /TONIGHT THROUGH FRIDAY NIGHT/...
There is weak upper level troughing over western WA today along
with low level onshore flow. The result is near-normal conditions
with temperatures close to average. An upper level low will
spin off B.C on Thursday while a front stalls offshore. Models
bring rain to SW B.C. but keep western WA dry. The upper low
makes very little movement on Friday and precipitation is aimed
to our north again. The air mass is a little warmer, though,
with higher heights and a building ridge to the east. Forecast
highs will reach the lower to mid 80s in the interior - a few
degrees warmer than average. The coast will see temps in the 60s
and 70s. Overnight lows will track in the 50s to help keep the
overall Heat Risk category at Minor. 33
&&
.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
Cooler, cloudier and wetter conditions are forecast for Saturday
as the upper level low tracks inland and over WA. The north
coast and north Cascades have the highest probabilities of
seeing wetting rain through the day. The air mass will be
slightly unstable too and thunderstorms chances have increased
for the north interior and northern Cascades. Showers with a
convergence zone are expected Saturday afternoon/evening with
post-frontal onshore flow increasing. It`ll be windy too with
S/SW winds gusting to 20-30 MPH across most lowland areas.
The upper level low exits to the N/NE on Sunday with a few
lingering showers in the Cascades. High pressure will shift
inland early next week leading to warmer conditions. Interior
lowland temperatures will reach the 80s to lower 90s again. 33
&&
.AVIATION...
Southwest flow aloft and low level onshore flow will persist
through Thursday. Widespread VFR conditions continue across the
terminals this evening. Another round of low stratus is expected
early Thursday morning, particularly along the coast, along
portions of the Strait, and along the south Sound/Kitsap
Peninsula. Surface winds are persisting out of the north/northwest
this evening at 6-12 kt for the majority of the terminals.
Winds will ease overnight and switch back to the southwest along
the coast and most central/south Sound terminals (except KPAE)
by early Thursday morning. Another wind shift to the north is
expected for the terminals on Thursday evening.
KSEA...VFR ceilings continue this evening. LAMP and REFS guidance
continues to show around a 20% chance of MVFR ceilings making
it into the terminal briefly on Thursday morning, with the most
likely scenario keeping stratus well to the west and south of
the terminal. Northwest winds at 5-10 kt will ease to 4-6 kt
later tonight and then shift to the southwest by 12Z Thursday.
Winds Thursday will persist between 5-10 kt, with a wind shift
to the northwest expected by Thursday evening.
&&
.MARINE...
High pressure will remain over area waters through Friday with
low-level onshore flow continuing. A SCA remains in effect for
the central/eastern Strait of Juan de Fuca this evening through
early Thursday morning. The next disturbance will reach the
waters Friday night into Saturday with the potential for more
headlines and a particularly strong westerly push through the
Strait of Juan de Fuca in its wake. Seas over the coastal waters
are expected to remain in the 4 to 6 foot range into early next
week.
&&
.FIRE WEATHER...
Near-normal conditions are forecast through Thursday. On
Friday, expect warmer and drier weather with min humidities
reaching the 30s in 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). 33
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory until 5 AM PDT Thursday 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