Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
962
FXUS66 KSEW 241532
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
832 AM PDT Fri Apr 24 2026
.SYNOPSIS...
Upper level ridge offshore extending into Northern British
Columbia combined with an upper level low over the Canadian
Prairies giving Western Washington dry northerly flow aloft
through the weekend. The low will move east Monday with the
upper level ridge moving over the area in the middle of next
week.
&&
.SHORT TERM /TODAY THROUGH SUNDAY/...No significant changes made
to the forecast this morning. The previous discussion can be
found below along with updates to the aviation section:
Satellite imagery shows some stubborn stratus over Pierce county
and in the Skagit River Valley early this morning. Patchy fog
over the Southwest Interior with local visibilities a half mile
or less. Mostly clear skies over the remainder of the area.
Cooler locations at 3 am/10z were in the upper 30s. Most of the
area was in the lower to mid 40s.
Upper level ridge offshore extending into Northern British
Columbia combining with an upper level low well to the east
giving Western Washington dry northerly flow aloft today. Stubborn
stratus along the the patchy fog will dissipate later today
leaving mostly sunny skies. Highs in the upper 50s to mid 60s.
Cool night tonight with clear skies and light flow in the lower
levels. Have issued a frost advisory for portions of the
Southwest Interior and Sound Puget Sound for low temperatures
near freezing Saturday morning. Elsewhere lows in the mid to
upper 30s.
LIttle change in the pattern over the weekend with dry northerly
flow aloft continuing over the area. Slight chance Sunday that
weak instablilty over the Cascades late in the day could
trigger a shower. Highs in the 60s. Lows in the mid 30s to lower
40s. Felton
&&
.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
Models in good agreement that a weak shortwave rotating around
the upper level low will increase the cloud cover Monday as well
as the chances for showers over the Cascades. With the flow
aloft north northeasterly showers could float down into the
Cascade foothills. Upper level low moving east Tuesday and
Wednesday with the upper level ridge offshore drifting over
Western Washington in the middle of next week. Highs in the
lower to mid 60s Monday and Tuesday warming to the 60s and lower
70s Wednesday and Thursday. Lows in the upper 30s to mid 40s.
Seattle April rainfall through the 23rd is 2.73 inches. Current
forecast is dry for the rest of the month. The normal monthly
April rainfall for Seattle is 3.18 inches. If the forecast holds
and April ends up below normal that will make 30 out of the
last 40 months ( since the start of 2023 ) Seattle will have
below normal monthly rainfall. Felton
&&
.AVIATION...
Dry, northerly flow over western WA today with a ridge offshore and
a low/trough to our east. Except for a few patchy areas of fog and
low cigs (primarily affecting KOLM as of 15Z and isolated portions
of the interior/Puget Sound), clear skies are expected today. Light
and variable winds this morning will increase to N/NE 8-15 kt. A few
gusts to 20 kt will be possible this afternoon. Winds become
calm/light and variable out of the northeast tonight, with another
slight chance of patchy fog/low cigs for Saturday morning.
KSEA...VFR conditions prevail through the periods with mostly clear
skies. Light and variable winds will become N/NE 8 to 12 kt. Gusts
to 15-20 kt will be possible this afternoon between 21-03Z. Chance
of low cigs/fog Saturday morning remains low.
62/HPR
&&
.MARINE...
The overall pattern remains fairly consistent through the next 7
days with higher pressure well offshore and lower pressure inland,
for mostly northerly winds over the coastal waters. Easterly winds
through the Strait will continue through Saturday, with onshore flow
resuming Sunday into next week. Seas will remain in the 4 to 8 ft
range.
Northerly winds through the East Strait down through Admiralty Inlet
and Puget Sound will be breezy this afternoon and evening, with
winds reaching 15 to 20 kt.
62
&&
.HYDROLOGY...
No river flooding in the next 7 days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...Frost Advisory from 11 PM this evening to 10 AM PDT Saturday
for Lowlands of Lewis and Southern Thurston Counties-
Lowlands of Pierce and Southern King Counties-Olympia and
Southern Puget Sound-Southern Hood Canal.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion