FXUS66 KSEW 061023
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
323 AM PDT Thu May 6 2021

.SYNOPSIS...A front will bring a quick shot of rain and breezy
weather later today. Friday will be showery and cooler as an upper
trough moves through. Cool temperatures and a chance of rain will
continue over the weekend as another weak system moves through.
Dry and warmer weather will return for the first half of next week
as high pressure moves over the area.

&&

.SHORT TERM /TODAY THROUGH SATURDAY/...Dry weather will continue
this morning ahead of an approaching frontal system. Rain from a
front will reach the coast late in the morning or around midday.
The front will weaken a bit as it moves inland but most areas
should get a brief shot of rain this afternoon. It will be locally
breezy coast and north interior with the front today. Highs will
cool a few degrees today over the interior while the coast will
see 10-15 degrees of cooling.

An upper trough will move through the area tonight and Friday for
showery weather, especially on Friday with added lift from the May
sunshine. It will become unstable enough for a slight chance of
thunderstorms over the interior Friday afternoon. A Puget Sound
Convergence will likely form north of Everett tonight then
sag south into King County on Friday. Highs will cool into the
50s all areas on Friday which is a few degrees below normal.

Showers will linger over the area Friday night, mainly over the
Cascades and in a fading PSCZ. A chance of rain will continue on
Saturday with a weak system reaching the area in the
west/northwest flow aloft. Highs will be mostly in the 50s again.
Schneider

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...The remnants of a weak
system dragging through the area will maintain a chance of showers
on Sunday. An upper ridge will move over the area the first half
of next week for dry weather. The ensembles show some uncertainty
in the dry forecast midweek with a weak system perhaps clipping
the area but the overall consensus is for dry weather for now.
Highs will warm into the 60s to lower 70s by Tuesday and
Wednesday. Schneider

&&

.AVIATION...Southwesterly flow aloft becoming northwesterly Friday
as upper level low moves into the area. Weak front moving through
this afternoon with increasing low level onshore flow behind the
front.

Ceilings aoa 10000 feet this morning lowering to 4000-5000 feet
over the interior and to 1000-2000 feet along the coast this
afternoon. Little change in the ceilings tonight over the interior
with some improvement along the coast.

KSEA...Ceilings aoa 10000 feet through early afternoon. Ceilings
lowering down to 4000-5000 feet by late afternoon with light rain.
Little change in the ceilings tonight. Southerly wind 4 to 8
knots increasing to 10-15 knots this afternoon. Winds easing
tonight. Felton

&&

.MARINE...A front will reach the coast this afternoon and
move inland later this afternoon. Increasing onshore flow behind
the front tonight. Low level onshore flow continuing through the
weekend.

Small craft advisory winds over he coastal waters ahead and with
the front. Small craft advisory winds in the Central and Eastern
Strait of Juan de Fuca as well as Admiralty Inlet and the
Northern Inland waters tonight. Small craft advisory westerly
winds in the Strait of Juan de Fuca again Friday night. 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 until 6 PM PDT this evening 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.

Small Craft Advisory from 6 PM this evening to 2 AM PDT Friday
for Admiralty Inlet-Central U.S. Waters Strait Of Juan De
Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca-
Northern Inland Waters Including The San Juan Islands.

&&

$$

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