Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
127
FXUS66 KSEW 070934
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
234 AM PDT Tue Jul 7 2026
.SYNOPSIS...One more warm day in the interior today, then cooler
conditions on Wednesday due to increasing onshore flow. Onshore
flow will prevail through the weekend with near average
temperatures and a chance of mountain showers. Warmer and drier
conditions are forecast early next week with broad high
pressure.
&&
.SHORT TERM /TODAY THROUGH THURSDAY/...An upper level ridge will
slide farther east and inland today, while a deep upper low
spins off northern B.C. Across western WA, mostly clear skies
this morning with temperatures in the 50s to lower 60s. Overall,
temperatures will be cooler across the board today (compared to
yesterday) although highs will still track above normal in the
interior - mid/upper 70s to around 80. NW winds will keep the
coast in the 60s. The low off B.C. will send a weak/dry front
inland tonight/early Wednesday with increasing onshore flow
expected. With the flow turning onshore, smoke from nearby
Canadian wildfires will remain north and east of western WA.
Low pressure will shift inland into B.C./Alberta Wednesday and
Thursday with ongoing onshore flow across western WA.
Temperatures will track close to seasonal averages. 33
&&
.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...Through the period,
low pressure will sag south offshore while strong high pressure
builds over the Southwest. This puts western WA under (slightly)
moist SW flow with a chance of showers over the Olympics and
North Cascades. The probability of thunderstorms is low or less
than 10 percent. Heights build early next week as ridge shifts
north and expands over the CONUS. Temperatures will nudge warmer
than average with interior highs in the lower to mid 80s, and
70s along the coast. 33
&&
.AVIATION...VFR conditions will prevail for the interior
terminals today. IFR conditions will continue along the coast
this morning and slowly improve to MVFR this afternoon.
Widespread MVFR cigs look to return Wednesday morning, with
highest confidence (80-90% chance) along the coast. As for the
interior terminals, there is a 50-85% chance after 10z
Wednesday, with highest chances for the Kitsap Peninsula. IFR
cigs will also be possible along the Kitsap Peninsula and coast.
Generally SW winds along the interior terminals and WNW winds
along the coast and Strait of Juan de Fuca. Expect winds to
shift NW in the afternoon along central Puget Sound terminals as
early as 23z. Breezy conditions this morning will continue
today along the Strait of Juan de Fuca with gusts to 20-25 kt
likely.
KSEA...VFR conditions will prevail today. Confidence is increasing
for MVFR cigs to return after 10z Wednesday, with current
probabilities around 40-60%. Light SW winds this morning will shift
NW between 23z-01z at 5-7 kt, then shifting NE in the evening.
Guidance suggests southerly winds will return after 09z Wednesday.
29
&&
.MARINE...Broad high pressure will continue over area waters
through Thursday. A weak frontal system will move across the
waters late Tuesday/early Wednesday. However, high pressure is
expected to immediately rebuild behind the front. High pressure
will weaken late in the week as a low pressure system prepares
to swing south towards area waters.
Onshore flow will continue the rest of the week through Strait of
Juan de Fuca. A small craft advisory continues this morning for the
central and eastern portions. Winds will weaken slightly later this
morning but look to linger around small craft thresholds. Therefore,
the small craft advisory has been extended through this afternoon. A
stronger push of westerlies is expected this afternoon through the
Strait of Juan de Fuca. With increased confidence for gales, the
Gale Watch for this afternoon has been upgraded to a Gale Warning.
Small craft winds will also spill into Admiralty Inlet this
afternoon and a small craft advisory has been issued. Another strong
push is expected Wednesday afternoon. Latest guidance suggests there
is a 50-60% chance of gales through the Strait of Juan de Fuca. As a
result, a Gale Watch has been issued for Wednesday afternoon.
Additional headlines are possible throughout the rest of the week.
Seas expected to remain below 10 ft through the weekend. Portions of
the coastal waters may see steep seas on Wednesday/Thursday as seas
build to 6-8 ft with a dominant period of 7-8 seconds.
29
&&
.FIRE WEATHER...The overall fire weather threat will remain low
across western WA with onshore flow and higher humidities across
the area. Warmer and drier conditions are forecast early next
week although minimum humidities are not forecast to reach
critical thresholds.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory until 2 PM PDT this afternoon for Central
U.S. Waters Strait Of Juan De Fuca-East Entrance U.S.
Waters Strait Of Juan De Fuca.
Gale Warning from 2 PM this afternoon to 8 AM PDT Wednesday
for Central U.S. Waters Strait Of Juan De Fuca-East
Entrance U.S. Waters Strait Of Juan De Fuca.
Gale Watch from Wednesday afternoon through late Wednesday
night for Central U.S. Waters Strait Of Juan De Fuca-East
Entrance U.S. Waters Strait Of Juan De Fuca.
Small Craft Advisory from 1 PM this afternoon to 3 AM PDT
Wednesday for Admiralty Inlet.
&&
$$
NWS SEW Office Area Forecast Discussion