Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA

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FXUS66 KSEW 221605
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
905 AM PDT Sun May 22 2022

.SYNOPSIS...High pressure is over the region today. A couple of
weak weather systems will bring clouds to Western Washington Monday
through Wednesday. A more organized weather system will arrive
Thursday night and Friday with rain likely.

&&

.SHORT TERM /TONIGHT THROUGH WEDNESDAY/...We`re on track for highs
in the 60 to low 70s today with plenty of sun. No changes from the
previous forecast. 33

Previous discussion...At 3am there are low clouds on the coast,
part of the way down the Strait of Juan de Fuca, and over
southwest Washington--just into Chehalis, Olympia and Shelton.
There is also a patch on Whidbey Island. Those low clouds will
increase a bit more through daybreak and then burn back to the
coast. Across the interior of Western Washington it will be
sunny-- and the warmest day of the week ahead. The high in Seattle
will up around 70. A weak front will break up over the area
tonight and Monday and then a second weather weather system will
reach Western Washington Wednesday. Nothing too remarkable about
the weather pattern in the week ahead--mostly cloudy most of the
time, maybe a few showers or some morning drizzle here and there--
mainly Monday and again Wednesday. 19

.LONG TERM /THURSDAY THROUGH SUNDAY/...Thursday looks like
another of these mostly cloudy days with temps in the 60s. A frontal
system arrives Thursday night and Friday for some rainy weather. The
precip should turn to scattered showers Friday night and Saturday. 19

&&

.AVIATION...Upper level ridge moving through the area today.
Northwesterly flow aloft becoming westerly tonight. In the low
levels onshore flow will continue into Monday.

Satellite imagery shows stratus along the coast, along the Strait
of Juan de Fuca, and also through the lower Chehalis valley into
the southern Puget Sound and Hood Canal this morning. Stratus
already scattering and expect skies across the interior to clear
and for stratus to retreat back to the coast by the early
afternoon hours. Most terminals outside of stratus are VFR this
morning. Terminals in fog and stratus are a mix of IFR to LIFR
with ceilings below 1000 feet and local visibility 1-3sm.

KSEA...Stratus falling short of the terminal to the south this
morning. Increasing high clouds this afternoon and tonight.
Southeast wind 6 kts or less becoming southerly this morning and
northwesterly late this afternoon into the evening hours.
Felton/Borth

&&

.MARINE...High pressure will persist over the waters into Tuesday
with diurnally driven small craft advisory westerlies expected in
the central and eastern Strait of Juan de Fuca tonight and again
Monday night. Small craft advisory northwest winds in Admiralty
Inlet this evening. High pressure will dissipate Tuesday night
with a weak system moving through the waters Wednesday. A stronger
system will approach the offshore waters later Thursday. Felton

&&

.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...None.
PZ...Small Craft Advisory from 6 PM this evening to 5 AM PDT Monday
     for Central U.S. Waters Strait Of Juan De Fuca-East
     Entrance U.S. Waters Strait Of Juan De Fuca.

     Small Craft Advisory from 6 PM this evening to 2 AM PDT Monday
     for Admiralty Inlet.

&&

$$

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