FXUS66 KSEW 021637

AFDSEW



Area Forecast Discussion

National Weather Service Seattle WA

937 AM PDT Wed Jul 2 2025



.UPDATE...No changes to the overall forecast. Please see the

aviation section below for updates to that forecast. 



&&



.SYNOPSIS...Warm and dry conditions will continue through 

Wednesday. A weak trough will move through the area into the end

of the week with increasing onshore flow and cooler 

temperatures into the holiday weekend. Mild and drier conditions

look to return by early next week as zonal flow develops.



&&



.SHORT TERM /TODAY THROUGH FRIDAY/...Upper level ridging has 

been continuing to shift eastward away from western Washington, 

allowing a weak trough offshore to slowly approach our area. 

Recent satellite imagery this morning shows marine stratus along

the coast attempting to creep into the Southwest Interior but 

having a hard time doing so. Stratus will burn off later on in 

the morning with a a more milder but dry day on tap, with 

temperatures moderating to the mid to upper 70s across the 

interior, and the low to mid 60s for areas along the coast with 

mostly sunny skies. 



The aforementioned weak trough will cross our region on Thursday

with enhanced onshore flow across the region and cooler

temperatures. High temperatures on Thursday will cool to the low

70s across the interior and mid 60s for areas by the water. There

may be a chance for a spotty rain shower or two across the coast 

and in the Cascades, but most likely will remain dry. 



The pattern remains the same heading into the Independence

Holiday, with morning clouds and general sunshine throughout the

day with temperatures hovering in the mid 70s. 



&&



.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...Ensembles agree on zonal

flow developing over western Washington, with continued mild

conditions throughout the weekend and into the first half of next

week. Morning clouds and afternoon sunshine will be the theme of

the weekend. Although this pattern generally can open the door 

for a chance of showers mostly along the coast and the North 

Cascades, it looks like the chance for precipitation is pretty 

low at this point. Clusters are hinting at another high pressure 

building over the area on Tuesday onward, which could signal 

warmer and drier conditions returning back to the area, but the 

exact details are uncertain at this time.



Mazurkiewicz



&&



.AVIATION...Weak upper level trough offshore moving inland will

dissipate tonight into Thursday. Southwesterly flow aloft. In 

the lower levels onshore flow will continue into Thursday.



IFR stratus along the coast currently stalling over the lower

Chehalis Valley bucked the odds and made it into the central

Kitsap Peninsula briefly this morning with MVFR stratus pushing

east into King and Pierce Counties and southward along the I-5

corridor into Thurston and Mason Counties. As expected this has

begun to erode as the morning warms and will dissipate late 

morning/early afternoon. MVFR stratus forming along the coast 

tonight 03z-06z will move inland overnight getting just east of 

Puget Sound for a few hours Thursday morning ( 13z-17z ). 



KSEA...Stratus that did move into the the terminal this 

morning has already begun to burn back to the west and south.

VFR conditions will persist through the afternoon and evening. 

HREF ensemble showing some chance of MVFR stratus developing 

late this eventing near the terminal into Thursday morning. 



&&



.MARINE...High pressure will remain in place across the coastal

and offshore waters this week with thermally induced low 

pressure east of the Cascades. A weak front will dissipate over 

the offshore waters Saturday. 



Diurnal westerly pushes through the Strait of Juan de Fuca each 

evening through the weekend. Small craft advisory tonight for the

Central and Eastern Strait, Friday evening looks to be the 

strongest push after tonight with another round of small craft 

advisory winds likely for the Central and Eastern Strait. Felton



&&





.SEW WATCHES/WARNINGS/ADVISORIES...

WA...None.

PZ...Small Craft Advisory from 6 PM this evening to 5 AM PDT 

     Thursday for Central U.S. Waters Strait Of Juan De Fuca-

     East Entrance U.S. Waters Strait Of Juan De Fuca.



&&



$$