Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
061
FXUS66 KSEW 060319
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
819 PM PDT Sun Jul 5 2026
.SYNOPSIS...
A weak ridge of high pressure will bring warmer and
drier conditions to Western Washington into Tuesday. A weak
frontal system moves through on Wednesday with cooler
temperatures and a little rain for parts of the area. Onshore
flow will keep temperatures near normal for the second half of
the week with areas of night and morning clouds.
&&
.SHORT TERM /TONIGHT THROUGH TUESDAY NIGHT/...
Mostly clear skies this afternoon with temperatures ranging in
the 60s and 70s. Stratus along the coast will move onshore along
the immediate coastline tonight, but expected to mainly be
confined to Grays Harbor County and Strait of Juan de Fuca with
rather weak onshore flow. Temperatures warm further on Monday as
weak ridging builds further into Western Washington. High
temperatures on Monday range in the mid 70s to mid 80s, with
upper 60s along the immediate coast.
Weak ridging continues over the Pacific Northwest on Tuesday,
however, troughing will approach BC late Tuesday, resulting in
increase high clouds into the afternoon over Western Washington.
Temperatures will cool a few degrees on Tuesday due to increase
high cloud coverage and onshore flow. Minor HeatRisk is expected
both Monday and Tuesday.
&&
.LONG TERM /WEDNESDAY THROUGH SUNDAY/...
A weak frontal system will move across Western Washington
Tuesday night through Wednesday resulting in cooler temperatures
and increased cloud cover. Precipitation potential also
increases during this period, particularly for the Cascades,
Olympics, and lowland areas from King County northwards.
However, any precipitation is expected to mainly be light (less
than 0.10" for most). Weak upper level ridging begins to build
back into the area Wednesday night and Thursday. Another front
then looks to weaken offshore on Friday, bringing minimal
precipitation chances, mainly to the Olympic Peninsula. Onshore
flow expected to continue the second half of the week into next
weekend with strong upper ridging over the Southwest and
troughing over British Columbia. This will likely result in
periods of morning clouds, afternoon sunshine, and relatively
seasonal temperatures. JD
&&
.AVIATION...
VFR conditions across the terminals as high pressure builds
under a ridge with weak flow aloft. NW winds will continue
across most terminals through the evening at 6-12 kt with gusts
to 20 kt, then transition to the northeast 5-10 kt overnight.
For Monday morning, the coast has the highest likelihood of
seeing MVFR/IFR stratus in the morning with a 50-60% chance
between 12 and 18Z. Probabilities for remaining interior
terminals remain too low to introduce BKN in the 06Z TAF package
(10-20%) but can`t rule out FEW or SCT in the morning around
3,000 ft, before clearing out. Winds turn back to the NW 5-10 kt but
likelihood of gusts is low for Monday.
KSEA...VFR likely to persist through the TAF period. NW winds
6-12 kt gusting to 20 kt will diminish to around 5 kt this
evening, shifting to the northeast before switching back to the
NW in the afternoon at 5-10 kt.
HPR
&&
.MARINE...
A rather stagnant weather pattern will continue for
Washington`s waters through the forecast period. Broad high
pressure over the northeast Pacific and lower pressure inland
will maintain a pattern of onshore flow. Small craft conditions
will be present in the coastal waters this afternoon through
tomorrow morning due to the northwest winds. This pattern will
result in increased westerly winds through the Strait of Juan de
Fuca each evening. Probabilities are increasing (60-90%) for
winds through the Strait of Juan de Fuca to reach small craft
advisory criteria Monday afternoon. These conditions continue
through at least Tuesday morning with similar confidence for a
return Tuesday afternoon. A weak front will move over the waters
Tuesday evening/Wednesday morning. This will slightly weaken
high pressure over the waters, but it is expected to quickly
rebuild behind the front.
&&
.FIRE WEATHER...
Low-level onshore flow will continue through
the week. This will keep good overnight relative humidity
recoveries in the forecast and help subdue fire weather concerns
despite somewhat warmer temperatures through Tuesday. In
addition, a weakening front will move across the area Tuesday
night into Wednesday, bringing the chance for light rain to
portions of Western Washington. JD
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory from 2 PM Monday to 8 AM PDT Tuesday for
Central U.S. Waters Strait Of Juan De Fuca-East Entrance
U.S. Waters Strait Of Juan De Fuca.
Small Craft Advisory until 8 AM PDT Monday for Coastal Waters
From Cape Flattery To James Island 10 To 60 Nm-Coastal
Waters From Cape Flattery To James Island Out 10 Nm-
Coastal Waters From James Island To Point Grenville 10 To
60 Nm-Coastal Waters From James Island To Point Grenville
Out 10 Nm-Coastal Waters From Point Grenville To Cape
Shoalwater 10 To 60 Nm-Coastal Waters From Point
Grenville To Cape Shoalwater Out 10 Nm.
&&
$$
NWS SEW Office Area Forecast Discussion