Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
282
FXUS66 KSEW 010240
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
740 PM PDT Thu Apr 30 2026
.SYNOPSIS...
Warm and dry conditions are expected today, followed by cloudy
skies and slightly cooler temperatures Friday. Temperatures
remain on track to warm into the upper 70s to mid 80s by Sunday
into Monday. Dry and cooler - but still seasonably warm - weather
looks to linger through the remainder of next week.
&&
.SHORT TERM /TONIGHT THROUGH SATURDAY NIGHT/...
Partly sunny skies and warm conditions will linger into the
evening. A weak front will brush the area tonight, bringing
little more than increased cloud cover and slightly cooler
temperatures Friday. Rebounding high pressure over the weekend
and into early next week will boost temperatures Saturday with
widespread Minor HeatRisk. 21
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...
Sunday and Monday continue to look to be the warmest days with
areas of Moderate HeatRisk particularly over parts of eastern
Grays Harbor County inland through Mason County to much of the
interior south of Puget Sound. As is typical many of the Cascade
Valleys will also likely see Moderate HeatRisk values as well
with temperatures in the low 80s. Moderate HeatRisk impacts
include those sensitive to the heat and who may be without
adequate cooling. Additionally, though it will be warm outside,
it is important to remember that area streams, rivers, lakes and
the ocean - including Puget Sound - will still have very cold
temperatures - often around 50 degrees or colder. Please be
cautious around colder water despite the air temperatures.
Relative humidity also looks to be unseasonably low across
western Washington on Sunday. This poses an elevated risk of
fire danger primarily among dry grasses or dead and dry
vegetation.
Warm temperatures continue into Monday as high pressure moves
overhead from the NE Pacific. Onshore flow returns on Tuesday,
bringing temperatures down, but still warmer than normal and dry
through the remainder of the week.
&&
.AVIATION...
High pressure, with dry and stable conditions across western WA
will give way to a weak system overnight with increasing high
clouds. Low level marine clouds may clip the coast early Friday
morning resulting in MVFR conditions for HQM while remaining
terminals expected to remain VFR. Flow aloft will remain
southwesterly into Friday while surface winds generally northerly
with some shifts to the NE and NW.
KSEA...VFR conditions for the TAF period with increasing high
clouds overnight. Winds remaining north to northeasterly
north-northeast at 5-7 kts.
18
&&
.MARINE...
A weak frontal system over the northeastern Pacific will
approach the coastal waters tonight into Friday and dissipate.
Onshore flow will increase across portions of the Strait of Juan
de Fuca this evening, but otherwise do not expect many sensible
weather impacts to the area waters from this system. Seas over
the coastal waters will be steep at times tonight into Friday,
with the dominant wave group primarily persisting at 5-7 ft at
around 5-6 seconds. These conditions have resulted in SCAs for the
coastal waters and eastern and central portions of the Strait. Winds
in the Strait do not look to materialize until later tonight, so
that headline looks to remain in good shape. Will continue to
monitor seas for the coastal headlines as latest buoy obs not
showing the anticipated chop. Will leave current headlines in place
for now.
High pressure will then rebuild over the northeastern Pacific
Friday and remain situated over the region through the weekend
with lower pressure inland. Additional rounds of westerly small
craft winds will be possible Friday night into Saturday along
the central and eastern Strait of Juan de Fuca, with latest
HREF probabilistic guidance indicating a 50-60 percent chance of
gusts exceeding 21 kt. Periods of offshore flow are likely to
develop over the weekend, with winds turning more north/northeasterly
across the interior waters. Additional rounds of westerly pushes
are possible along the Strait early next week as onshore flow
returns to the region.
Seas will hover between 5-8 ft through Friday and into the
weekend, possibly increasing towards 9-10 ft at times Sunday
into Monday.
14/18
&&
.HYDROLOGY...
No river flooding is expected during the next 7 days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory until 5 AM PDT Friday for Central U.S.
Waters Strait Of Juan De Fuca-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-East Entrance U.S. Waters Strait Of
Juan De Fuca.
&&
$$
NWS SEW Office Area Forecast Discussion