Kent, Virginia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

264
FXUS66 KSEW 251548
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
848 AM PDT Fri Jul 25 2025

.SYNOPSIS...Upper level trough along with low level onshore flow
will give Western Washington a couple of cool and mostly cloudy
days today and Saturday. Upper level ridge building over the area
beginning Sunday with sunny and warmer weather next week.
Southerly flow aloft developing midweek brings up the possibility
of late day convection over the Cascades Wednesday and Thursday.

&&

.SHORT TERM /TODAY THROUGH SUNDAY/...The latest forecast remains
on track with no updates this morning. Upper level trough
developing today with the trough axis offshore. Low level onshore
flow throughout the day. While the interior onshore gradients
weaken, the cross Cascade gradient increases with KSEA- KEAT and
KSEA-KYKM possibly as high as plus 10 mb by 00z this afternoon.
This will keep reinforcing the marine layer while the July sun
tries to erode it. In the end the onshore flow will win the battle
most of the day with cloudy skies only giving way to partly sunny
conditions in the afternoon. The prolonged cloud cover will keep
high temperatures in the 60s to lower 70s, well below normal for
this time of year ( Seattle normal is 79 degrees ).

Little change in the pattern tonight and Saturday. Weak upper
level trofiness remaining over the area with the trough axis
offshore. Low level onshore flow a little weaker Saturday for a
slightly earlier appearance of the sunshine in the afternoon.
Highs a little warmer for the interior, mid 60s to mid 70s. Highs
on the coast will remain in the lower to mid 60s. Lows tonight in
the 50s.

Slight change in the pattern later Saturday night into Sunday.
Upper level trough centered offshore begins to weaken while the
huge upper level ridge over the middle of the country starts to
slowly back build towards the Pacific Northwest. Onshore flow
continues to weaken Sunday with 500 mb heights up to the upper 570
dms by 00z Monday. Sunday will continue the trend of a little
more sunshine in the afternoon and a little bit warmer
temperatures. Highs mostly in the lower to mid 70s for the
interior and mid 60s coast. Lows Sunday morning in the 50s.

.LONG TERM /MONDAY THROUGH THURSDAY/...Extended models in good
agreement with the upper level ridge continuing to build over
Western Washington Monday and Tuesday, 500 mb heights in the mid
580 dm with just light onshore flow. Highs warming to normal
Monday, 70s and lower 80s for the interior and a little above
normal Tuesday, mid 70s to mid 80s for the interior. The coast
will stay in the 60s Monday but could see some lower 70s Tuesday.

Model solutions become more diverse Wednesday and Thursday with
the introduction of a weak upper level low off the California
coast. Some model solutions have the remnants of the low near
Western Washington Thursday. Other solutions keep this feature
south of the area before it dissipates. Models have trouble with
this kind of feature this time of year. Pattern recognition
southerly flow aloft, which the low could produce over the area,
means the potential for convection over the mountains in the
middle of summer. MUCAPE clusters are consistent with 500-1000
J/KG Wednesday afternoon over the Olympics and the Cascades
indicating the models are picking up on some instability. Way too
far out at this point for specifics. For now just a slight chance
of showers both days in the Cascades. Given the very dry
conditions over the area any potential for convection is very
closely monitored. Temperatures remaining near to a little above
normal both days. Felton

&&

.AVIATION...A shallow trough north in British Columbia will slowly
dig southward today. Weak zonal flow aloft will increase and turn
slightly west-southwest as this feature digs down. With the
increased onshore flow associated with the trough, the marine
stratus made an earnest push into Puget Sound earlier this morning,
as it now extends up to the Canadian border. Cigs within the marine
layer have been MVFR to IFR, with mist between 3-5 SM. Given the
increased extent, the stratus may linger a bit longer than the
previous few days, with an anticipated scattering time closer to 18Z-
20Z today. Thereafter, expect a VFR afternoon and generally
southwesterly winds. Conditions will be breezy again through the
Strait of Juan de Fuca tonight. Some diffluence from this push
through the strait will turn winds northerly in most Puget Sound
terminals this evening (from 2-4Z through no later than 12Z).
Another marine push (of MVFR to IFR conditions) is likely Saturday
morning with MVFR/IFR conditions. Winds will return to the southwest
Saturday morning.

KSEA...IFR cigs continue at the terminal (with mist/drizzle bringing
visibilities down to 3-5 miles). IFR cigs are expected through 16Z-
17Z, improving to MVFR and then VFR between 20Z-21Z. Winds are
expected to be southwesterly through much of the TAF period, but a
period of northerly winds is possible after 00Z, becoming light and
variable after 07Z. While northerly, the wind speeds will be between
5-7 kts. Cig probabilities for Saturday morning: 40% chance of MVFR,
15% chance of IFR (per NBM).

21/HPR

&&

.MARINE...An upper level trough will bring increasing onshore flow
today. Marine stratus has made it inland to Puget Sound and locally
lower visibilities over the waters is possible through much of the
morning. Another westerly push through the Strait of Juan de Fuca is
forecast for this evening, but will be more likely of Small Craft
Advisory magnitude and not Gales. The gustiest portion of the Strait
to be impacted will be the Central Strait, but a SCA has been posted
for the eastern and central Strait. Coastal seas will remain 5 feet
or less throughout the weekend.

21

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory from 5 PM this afternoon to 2 AM PDT
     Saturday for Central U.S. Waters Strait Of Juan De Fuca-
     East Entrance U.S. Waters Strait Of Juan De Fuca.

&&

$$