South Hill, Virginia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

239
FXUS66 KSEW 250924
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
224 AM PDT Wed Mar 25 2026

.SYNOPSIS...Showers and mountain snow continues today under
onshore flow. Drier weather is in store moving toward the
weekend as high pressure shifts inland. A trough will bring
wetter weather early next week.

&&

.SHORT TERM /TODAY THROUGH FRIDAY/...We`re under onshore flow
today with a few lingering showers over the area. Showers will
increase late this morning as a quick-moving cold front slides
inland. We`ll then see showers with a convergence zone aimed
over the King/Snohomish line this afternoon and evening. Up in
the mountains, snow levels will lower to around 2500 ft today
with snow in the Cascades and passes. Heaviest snow amounts will
be over the north Cascades and central Cascades with Stevens
Pass getting showers from the convergence zone - a Winter
Weather Advisory is in effect. The air mass is slightly unstable
and there`s a chance of thunderstorms too. Expect highs around
50 today with cooler overnight lows in the 30s.

A weak front will clip area on Thursday for showers mainly on
the coast, Olympics and north Cascades during the morning.
Otherwise, we`ll see drier conditions moving toward the
afternoon and evening as high pressure shifts inland and the
flow turns offshore.

High pressure and offshore flow will lead to dry and slightly
warmer conditions on Friday. Temperatures will reach the mid to
upper 50s with lower 60s possible in the interior. 33

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...High pressure
continues into Saturday for one more dry and mild day. An
offshore trough will push the ridge inland on Sunday with a
chance of rain and slightly cooler conditions over western WA.
Rain will increase on Monday as the trough eventually shifts
inland. We may see a brief break on Tuesday then more rain
headed our way by midweek. 33

&&

.AVIATION...Southwest flow aloft will continue as an upper
level trough axis approaches the region and moves onshore later
today. The air mass is moist and will become somewhat unstable
with increasing showers and isolated thunderstorms. Mainly VFR
ceilings early will lower to MVFR at times in some of the
heavier showers. Increasing low level onshore flow will lead to
gusty west to southwest surface winds this afternoon. A
convergence zone is expected to develop later this afternoon
into this evening over Snohomish and north King counties.

KSEA...VFR ceilings early will lower to MVFR at times after 17Z in
increasing showers. Ceilings are expected to improve again after 00Z
to mainly VFR. Convergence zone activity later today is expected to
remain mainly north of the terminal. Surface winds southerly 8 to 12
knots will become southwesterly 15 to 25 knots this afternoon then
ease this evening. Winds may become briefly erratic between 22Z and
03Z as a convergence zone develops north of the airport.

27

&&

.MARINE...An upper level trough axis moving onshore later today
will induce an increase in onshore flow late this morning into
this evening. Winds will ease tonight into Thursday as a broad
surface ridge builds across the coastal and interior waters. The
ridge will gradually shift inland on Friday leading to a period
of northerly flow. A weak trough and associated frontal system
will reach the waters on Sunday, but is not presently expected
to produce much in the way of impacts.

Hazardous coastal seas will gradually subside below 10 feet later
today and remain in the 5 to 8 foot range heading into the weekend.

27

&&

.HYDROLOGY...No river flooding over the next 7 days.

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...Winter Weather Advisory until 5 AM PDT Thursday for Cascades
     of Snohomish and Northern King Counties-Cascades of
     Whatcom and Skagit Counties.

PZ...Small Craft Advisory until 11 AM PDT this morning for Grays
     Harbor Bar.

     Small Craft Advisory until 11 PM PDT this evening 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-West Entrance U.S.
     Waters Strait Of Juan De Fuca.

     Gale Warning from noon today to 8 PM PDT this evening for
     Central U.S. Waters Strait Of Juan De Fuca-East Entrance
     U.S. Waters Strait Of Juan De Fuca.

     Small Craft Advisory from 11 AM this morning to 11 PM PDT this
     evening for Northern Inland Waters Including The San Juan
     Islands.

     Small Craft Advisory from 10 AM this morning to 6 PM PDT this
     evening for Admiralty Inlet.

     Small Craft Advisory from 11 AM this morning to 7 PM PDT this
     evening for Puget Sound and Hood Canal.

&&

$$