FXUS66 KSEW 021026

AFDSEW



Area Forecast Discussion

National Weather Service Seattle WA

326 AM PDT Wed Jul 2 2025



.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 /SATURDAY 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 and in the Strait of Juan de Fuca. Onshore

gradients weakening. There is some stratus forming over the Puget

Sound but this area is small. Tough call on how far east the

stratus will get. With the onshore gradients weakening and the

lack of eastward progress in the stratus deck in the last hour or

two will keep the stratus out of the terminals east of Puget Sound

this morning. For the areas with stratus it 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...Will keep the stratus west of the terminal this morning.

Southwest wind 4 to 8 knots except westerly wind 4 to 8 knots

23z-04z. MVFR stratus near the terminal beginning Thursday 

morning around 13z. Felton



&&



.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...Gale Warning until 3 AM PDT early this morning 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 5 AM PDT Thursday 

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

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



     Small Craft Advisory until 5 AM PDT early this morning for 

     Admiralty Inlet.



&&



$$