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312
FXUS66 KSEW 070419
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
919 PM PDT Thu Jun 6 2024

.SYNOPSIS...
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High pressure will continue to build across the West
with warm and dry conditions dominating through Saturday. High
pressure will move east of the area beginning Sunday with
occasional weak systems through next week allowing temperatures to
gradual cool closer to seasonal normals.
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&&

.SHORT TERM /TONIGHT THROUGH SUNDAY/...
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A very pleasant evening
across western Washington with only a few high cirrus passing
overhead and temperatures in the mid 60s inland and mid to upper
50s along the coast. Light northwesterly winds turning variable at
times tonight. Winds should increase out of the north closer to
10 mph tomorrow with another sunny day in store.

High pressure continues to build across the western U.S.
resulting in increasing temperatures through Saturday. Little
change to the forecast from 24 hours ago with HeatRisk solidly in
the yellow/minor category except for a few very isolated areas of
orange/moderate in the Cascade Foothills and perhaps some urban
heat islands. The high pressure ridge axis shifts east on Sunday
opening the door for weak waves to move into the region bringing
some onshore flow, additional clouds, and perhaps some light
shower activity to the mountains.

.LONG TERM /MONDAY THROUGH THURSDAY/...The average pattern will
remain fairly static through much of next week with the region
sandwiched between a ridge over the Intermountain West or central
US and a trough over the eastern Pacific ejecting occasional
waves across the region. This will result in temperatures trending
back towards normal. The area will remain mostly dry though
occasional light precipitation cannot be completely ruled out.

Davis/Wolcott
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&&

.AVIATION...
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West-southwest flow aloft veering more west-
northwesterly into early Friday as upper-level ridging amplifies
upstream. Mostly clear skies (VFR) expected throughout the TAF
period with high clouds streaming overhead at times. Brief fog and
stratus possible along the coast with a 35% chance for MVFR or
lower restrictions at KHQM from 10-16Z. Northerly winds
throughout most TAF sites 5-10 kt with isolated higher gusts.

KSEA...VFR cigs with high clouds at times throughout the TAF period.
North-northwesterly winds 5 to 10 kt this afternoon with a 30%
chance for isolated gusts around 15 kt Friday afternoon and
evening.

Davis/McMillian
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&&

.MARINE...
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1026 mb surface high is currently positioned over the
offshore waters of BC with northerlies over the coastal waters.
Wind gusts have occasionally been gusting from 20-23 kt this
evening but are forecast to subside into tonight, thus opted to
not to issue any advisories for now. Onshore flow will increase
Saturday night into Sunday bringing westerly SCA winds through the
Strait of Juan de Fuca. Seas below 10 ft, between 5 to 8 ft
through Saturday. Seas will then build Saturday night into Sunday,
with seas potentially approaching 10 feet for the outer coastal
waters Saturday night into Sunday and possibly again around
midweek.

Davis/McMillian
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&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&

$$