Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
442
FXUS66 KSEW 232147
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
247 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/...
Still plenty of cloud cover this afternoon across Western
Washington. Clouds are expected to slowly scatter out late this
afternoon/evening. 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...
An upper low/trough will continue to dig east of the terminals, with
increasing north flow aloft tonight into Friday. Cloud coverage
remains well intact this afternoon, with satellite showing some
scattering beginning to take place to the north in Whatcom/Skagit
Counties. The lowest ceilings this afternoon remain in the north
sound with MVFR conditions, which will lift to VFR later this
afternoon. VFR conditions continue elsewhere, with partial to near
total clearing expected to continue southward this afternoon &
evening. Winds this afternoon will turn from southwest to northwest
4-8 kt as the north flow mixes down. Fog likelihood for Friday
morning is low as the winds turn to the northeast and dry the air,
but can`t rule out a few patches of fog or low cigs in the morning
(best chance is for Cascades and Pacific Coast areas). Clear skies
are expected for Friday. Few spots Friday may see northeast gusts to
20 kt in the morning/afternoon.
KSEA...VFR expected through the TAF period. Ceilings this afternoon
will lift and scatter this evening. Probabilities for fog remain
very low, but could see a few CIGs develop in the morning. Southwest
winds 4-8 kt will shift to the northwest this evening after 23Z,
continuing to the northeast tonight/Friday. Winds may become gusty
to 20 kt from the north/northeast Friday.
HPR
&&
.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 expected in the next 7 days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion