Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
712
FXUS66 KSEW 240322
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
822 PM PDT Thu Apr 23 2026
.SYNOPSIS...
Generally dry conditions expected into next week. Warmer
temperatures this weekend. Temperatures cool slightly Sunday
into Monday with a trough over Western Washington. An upper
level ridge will settle over the region midweek.
&&
.SHORT TERM /TONIGHT THROUGH SATURDAY NIGHT/...
No major updates have been made this evening. See the aviation
sections below for additional updates.
An upper level ridge edging into British Columbia and an upper
level low to the east will maintain dry northerly flow aloft
into the weekend. Temperatures today will peak in the mid 50s to
low 60s. Lows in the upper 30s to low 40s tonight. Plenty of
sunshine Friday and Saturday and warmer temperatures. High
temperatures Friday will be in the upper 50s to mid 60s. As for
Saturday, high temperatures will be in the 60s to low 70s.
Breezy northeasterly winds on Friday with gusts generally around 20-
25 mph. Stronger gusts expected along the coast and San Juan
Islands, up to 30 mph. Winds will gradually subside into the evening
hours. Friday night into Saturday morning will also be on the cool
side with the potential for frost development, with current
probabilities around 30-50% of seeing temperatures below 37 degrees.
29
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...
Another cool night expected Saturday night into Sunday morning with
the potential for frost. Models are trending slightly warmer than
the day before, but there is still a slight chance (25-40%) for
temperatures below 37 degrees for the southern interior.
Ensemble guidance remains in good agreement with an upper level low
to the east digging back to the west into Western Washington Sunday
and Monday. Conditions still trending dry for the majority of
places. However, increased cloud cover and light precipitation
is possible for the Cascades. The upper level low will push east
on Tuesday allowing an upper level ridge offshore to settle
over Western Washington starting late Tuesday. This ridge will
bring bring warmer conditions to the area. Models are suggesting
temperatures will warm up into the mid 60s along the coast and
upper 60s to low 70s along the interior Wednesday and Thursday.
29
&&
.AVIATION...
Dry, northerly flow over western WA tonight and
Friday with a ridge offshore and a low/trough to our east. Low
clouds will continue to gradually scatter with skies becoming
clear. Winds will turn from southwest to north/northwest 4-8 kt
as the north flow mixes down. Few spots Friday may see
northeast gusts to 20 kt in the morning/afternoon.
KSEA...VFR expected through the TAF period. Southwest winds 4-8
kt will shift to the northwest this evening then continuing to
veer to the northeast tonight/Friday. Winds may become gusty to
20 kt from the north/northeast Friday.
&&
.MARINE...
A trough to the east will move inland on Friday, with
onshore flow beginning to weaken and becoming offshore with
broad high pressure in the northeast Pacific. A few spots Friday
have a medium chance of seeing breezy northeast gusts over 20
kt (the north interior waters, Strait of Juan de Fuca, and
adjacent coastal waters). Outside of this, the pattern remains
quiet with occasional diurnal pushes through the strait next
week as the flow returns to onshore. Dry conditions are expected
over the waters most of the forecast period, with a slight
chance of showers Monday. A couple spots may see patchy fog
Friday morning.
Seas 6-8 ft Thursday will decrease to 4-6 ft Friday-Saturday,
building back to 6-8 ft Sunday-Monday before decreasing back to 4-6
ft.
HPR
&&
.HYDROLOGY...
No river flooding is expected over the next seven days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion