FXUS66 KSEW 012141
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
241 PM PDT Sun Jun 1 2025

.SYNOPSIS...An upper level ridge over the northeast Pacific will 
bring generally dry conditions and temperatures near to slightly 
above normal throughout the week. Warmer temperatures for the 
weekend, with temperatures above normal.

&&

.SHORT TERM /TONIGHT THROUGH WEDNESDAY/...Satellite imagery shows a 
mix of clouds and mostly clear skies across Western Washington this 
afternoon. Sky cover is expected to remain mostly clear for the 
majority of Western Washington tonight. A persistent upper level 
ridge pattern over the NE Pacific will be the dominant feature for 
Western Washington throughout the week, maintaining NE flow over 
the region. A weak disturbance may move across the region on 
Wednesday. Minimal QPF amounts expected, rather increased cloud 
cover and there may be some drizzle along the coast. Otherwise,
conditions expected to remain generally dry into the middle of the
week, with temperatures near/slightly above seasonable averages 
(low- to-mid 60s along coast and low 70s in the interior). 

.LONG TERM /THURSDAY THROUGH SUNDAY/...The ridging pattern over the 
NE Pacific will continue into late in the week keeping conditions 
generally dry and warm. Some models hint at another weak disturbance 
moving over the region on Friday, with little to no QPF expected. 
Ensemble uncertainty begins to increase for the weekend. However,
the majority of solutions maintain the upper level ridge 
offshore, keeping Western Washington dry and warmer, with 
temperatures above normal (mid- to- upper 60s along the coast and 
70s to low 80s along the interior).

29

&&

.AVIATION...Afternoon northwesterly gusts have set in across much of 
western Washington this afternoon, generally to around 20 kt. A 
field of fair weather cumulus clouds have kept some SCT and BKN cigs 
in at times, but otherwise conditions are VFR, and are expected to 
remain as such into the evening and overnight hours. Some morning 
clouds are possible along the coast, but with high pressure building 
in and drying things out, this is not the expectation for Puget 
Sound. Expect northerlies throughout the period.

An ongoing solar storm is likely to produce visible aurora 
activity overhead, peaking late tonight. 

KSEA...Gusty northwesterlies have arrived at the terminal with 
passing shallow cumulus at times. The gusts are expected to linger 
until around 03Z, where surface winds will remain northerly but 
decrease in speeds to between 6 and 8 kts. Expect these conditions 
to continue throughout the rest of the TAF period. 

21

&&

.MARINE...A strong surface ridge centered around 700 nautical miles 
offshore will remain in place into midweek producing onshore flow 
across area waters. Elevated seas and similar periods lingering into 
Monday has prompted the extension of the small craft advisory over 
the coastal waters. The ridge will weaken toward the later half of 
the week. Diurnally driven increases in onshore flow will lead to 
increases in westerlies each afternoon and evening in the central 
and east portions of the Strait of Juan de Fuca, most likely 
beginning Tuesday and beyond.  

The persistent onshore flow will generate seas at or above 10 feet 
over the outer coastal waters into at least Monday along with some 
fairly short periods for steep seas.

21

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory until 11 AM PDT Monday 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.

&&

$$