Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA

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FXUS66 KSEW 261645
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
941 AM PDT Sun Jun 26 2022

.SYNOPSIS...Hot conditions will remain in place into
Monday for much of the area. The coast will begin feel some relief
Monday as onshore flow returns, however area-wide cool down expected
for Tuesday as active weather returns. Slight chance of
thunderstorms in the Northern Cascades Tuesday and Wednesday.

&&

.SHORT TERM /TODAY THROUGH TUESDAY/...Off to a warm start this
morning with nearly all stations reporting temps already in the 70s.
On average, obs sites running 4 to 6 degrees warmer than yesterday,
however some outliers are running as much as 10 degrees warmer, such
as UIL. That said, highs still on track for hitting the lower to mid
90s today for most lowland areas and thus retaining confidence in
inherited Head Advisory headline.

Everyone, but especially those spending time outside today should
be mindful of heat related illnesses and stay hydrated.
Additionally, remember to wear proper sun protection (hat,
sunglasses, sunscreen etc.) throughout the day, especially during
the afternoon. For those who may be seeking relief in area waters
remember that the water temperatures is still very cold and shock
and hypothermia are certainly possible. The rivers are also running
fast so those recreating in and near them should be extra mindful.
And as always do not leave people or pets unattended in locked cars
as the temperature inside them will be significantly higher than
outside.

The coast should begin to feel some relief Monday as onshore
flow returns, with highs in the 70s expected. The interior on the
other hand will have another day of hot conditions with highs once
again in the low to mid 90s for much of the region.

By Tuesday the onshore flow will have increased coverage throughout
the CWA and as such will make temps significantly cooler for
interior locations with highs in the lower to mid 70. Highs along
the coast will be even cooler reaching only into the lower 60s.
Tuesday also marks the day of unsettled weather returning as an
upper level trough lingers offshore. This will bring back the steady
supply of moisture and the chance of some scattered drizzle and
light rain showers. Moreover, there is the slight chance of isolated
thunderstorms Tuesday afternoon, with the primary area of concern
being the North Cascades. Confidence in these storms forming is
still rather low.

18/Butwin

.LONG TERM /WEDNESDAY THROUGH SATURDAY/...From Previous
Discussion...The long term begins with that upper level low tracking
through the area. Continuing the chance of scattered drizzle and
light rain showers. We will remain rather unsettled through the rest
of the week as short wave disturbances move through the area.
Ensemble guidance does have us remaining mostly dry with more
seasonable temperatures. There does look to be the chance of another
slight warm up by the end of the week, but highs are expected to
remain in the upper 70s to low 80s at this time.

Butwin


&&

.AVIATION...Clear skies will maintain VFR conditions across the
region today and tonight with high pressure remaining in place.
Surface winds generally north or northeast today, with some increase
to 10-15 kt this afternoon. Expect a push of marine stratus along
the coastline by 15z Monday bringing IFR ceilings into KHQM and
KUIL.

KSEA...VFR continues today under clear skies. Expect north wind
increasing to 15 kt through afternoon, easing overnight.   Cullen

&&

.MARINE...Offshore flow will continue today with a thermal trough
along the coast. Gusty north winds will redevelop over Puget Sound
and Hood Canal this afternoon and evening (10-20 kt), but should
remain a bit weaker than yesterday so will hold off on any advisory
issuance. A surge of stratus and southerly winds will bring lower
visibility and advisory strength winds to the inner portions of the
coastal waters late Monday. Strong onshore winds Monday night and
Tuesday with increasing winds for all waters. The seas will be 2 to
4 feet with a short-period component as the winds become more
persistently northerly through the weekend.   Cullen

&&

.HYDROLOGY...The daily hydrology discussion has ended until the
start of the next rainy season; it will only be updated as needed
until then.

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...Heat Advisory until 11 PM PDT Monday for Bellevue and Vicinity-
     Bremerton and Vicinity-East Puget Sound Lowlands-Everett
     and Vicinity-Hood Canal Area-Lower Chehalis Valley Area-
     Olympics-Seattle and Vicinity-Southwest Interior-Tacoma
     Area-West Slopes North Cascades and Passes-West Slopes
     North Central Cascades and Passes-West Slopes South Central
     Cascades and Passes-Western Skagit County-Western Whatcom
     County.

     Heat Advisory until 11 PM PDT this evening for Central Coast-
     North Coast.

PZ...None.
&&

$$

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