Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
492
FXUS66 KSEW 292153
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
253 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 with low level onshore
flow will persist through Thursday. Widespread VFR conditions
through afternoon and evening. An additional round of low stratus
expected again early Thursday morning particularly along the coast,
strait and south Puget Sound/Kitsap Peninsula.
KSEA...VFR ceilings will linger through the forecast period.
morning. LAMP and REFS guidance showing around a 20% chance of MVFR
ceilings Thursday morning, with most likely scenario keeping stratus
well to the west and south of the terminal. NW winds 5-10 kt will
ease to 4-6 kt during the evening then shift to the SW Thursday
morning, 71% of REFS hires members show this occuring by 5 AM.
Another wind shift is possible to the NW late in the afternoon or
early evening.
&&
.MARINE...High pressure remain over area waters through Friday with
low-level onshore flow. A SCA remains in effect for the
central/eastern Strait of Juan de Fuca Wednesday evening through
early Thursday morning. The next disturbance will reach the waters
Friday night into Saturday with the potential for more headlines
particularly with a strong westerly push through the Strait of Juan
de Fuca. 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 from 7 PM this evening to 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