Marysville, Virginia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

079
FXUS66 KSEW 260952
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
252 AM PDT Tue May 26 2026

.SYNOPSIS...
Upper level low off the Northern Oregon coast will move
southeast today ending up in Northern California late this
afternoon. The low will not move much tonight through Thursday
then weaken and move east Friday. An upper level trough moving
out of the Gulf of Alaska just offshore Friday will move inland
Saturday. A weaker trough will move through Sunday followed by
some upper level ridging Monday.

&&

.SHORT TERM /TODAY THROUGH THURSDAY/...
Satellite imagery shows clearing along the coast and Southwest
Interior with mostly cloudy skies elsewhere. Doppler radar has a
band of showers over the North Cascades foothills moving
northwest towards Bellingham. Temperatures at 2 am/09z were in
the 40s and lower 50s.

Upper level low off the North Oregon coast will move southeast
today ending up over Northern California by late afternoon. This
will pull the showers rotating around the low south of Western
Washington by afternoon. Showers approaching Bellingham will be
north of the border before sunrise. Air mass slightly unstable
over the higher terrain this afternoon keeping a slight chance
of showers over some of the mountains. Clearing skies over the
South Puget Sound and Southwest Interior allowed fog to form
early this morning. The layer is shallow and will dissipate by
mid morning. Highs mostly in the lower to mid 60s.

Upper level low not moving much tonight and Wednesday keeping
shower activity south of the area. Patchy fog possible in the
fog prone locations like the Southwest Interior around sunrise
otherwise partly cloudy skies tonight and mostly sunny skies
Wednesday. Surface gradients going flat with southerly flow
aloft pushing some warm air up into the area. Highs much warmer
Wednesday, in the mid 60s to mid 70s. Lows tonight in the mid
40s to lower 50s.

Upper level low wobbling around over Northern and Central
California Wednesday night into Thursday. Upper level trough
exiting the Gulf of Alaska still well offshore Thursday but the
combination of the two features will create diffluent flow over
Western Washington Thursday afternoon. This plus daytime heating
could kick off some convection over the Cascades in the afternoon.
Another warm day over the interior with highs in the 70s. Highs
along the coast in the mid and upper 60s. Lows Thursday morning
in the upper 40s to mid 50s. Felton

&&

.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
Upper level low to the south weakening and moving east Thursday
night and Friday while the upper level trough offshore
approaches the coast. Chance of showers over the eastern portion
of the area. In the lower levels flow turning onshore Thursday
night with onshore flow continuing through Friday. Much cooler
Friday with highs near 60.

Models in good agreement with a couple of weak troughs moving
through the area over the weekend. Not much in the way of
moisture with the troughs but the low level flow will remain
onshore. This will keep clouds in the forecast with highs in the
lower to mid 60s Saturday and mid to upper 60s Sunday.

Upper level ridge building into the area Monday. Low level flow
turning weakly offshore. This will warm daytime temperatures
significantly with highs in the 70s to lower 80s.

Lows near 50 Friday morning. A little cooler Saturday, Sunday
and Monday mornings with the colder locations getting down to
near 40. Mid to upper 40s for the remainder of the area.

&&

.AVIATION...
East to southeast flow aloft is expected much of Tuesday as a closed
upper low along the Oregon coast gradually shifts southeastward.
Remnant low level moisture in the wake of this system will lead to
areas of MVFR ceilings and isolated pockets of IFR along with
isolated showers into midday. Gradual improvement to VFR is expected
across most of the region by around 00Z.

KSEA...Periods of MVFR ceilings are expected through midday before
a general lifting to VFR is expected this afternoon and evening.
Surface winds light southerly this morning will veer northwesterly 4
to 7 knots this afternoon then northerly 7 to 10 knots late this
afternoon.

27

&&

.MARINE...
A weak surface trough along the coast will shift southward and
weaken with broad high pressure over the offshore waters
expanding into the coastal waters tonight and Wednesday. This
will lead to increasing northwesterly winds over the outer
coastal waters. A system moving into British Columbia Thursday into
Friday will increase onshore flow with westerlies approaching gale
force in the central and east strait Thursday evening. Surface
ridging builds into the coastal waters and interior this weekend for
lighter winds.

Hazardous seas continue for the coastal waters into tonight. Seas
will subside to around 10 feet Wednesday. Another longer period
swell train around 10 feet is expected to arrive on Thursday.

27

&&

.HYDROLOGY...
The daily hydrology discussion has ended until the start of the
next rainy season; it will only be updated during this time as
needed.

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...High Surf Advisory until noon PDT today for Grays Harbor
     County Coast-Northern Washington Coast.

PZ...Small Craft Advisory until 8 PM PDT this evening for Grays
     Harbor Bar.

     Small Craft Advisory until 5 AM PDT early this morning for
     West Entrance U.S. Waters Strait Of Juan De Fuca.

     Small Craft Advisory until 5 PM PDT this afternoon for Coastal
     Waters From Cape Flattery To James Island Out 10 Nm-
     Coastal Waters From James Island To Point Grenville Out
     10 Nm-Coastal Waters From Point Grenville To Cape
     Shoalwater Out 10 Nm.

     Small Craft Advisory until 5 PM PDT Wednesday for Coastal
     Waters From Cape Flattery To James Island 10 To 60 Nm-
     Coastal Waters From James Island To Point Grenville 10 To
     60 Nm-Coastal Waters From Point Grenville To Cape
     Shoalwater 10 To 60 Nm.

&&

$$