Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
781
FXUS66 KSEW 010945
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
245 AM PDT Thu Oct 1 2026
.SYNOPSIS...
A weak system will bring precipitation chances across northern
portions of Western Washington. Warmer and drier conditions Friday
into the weekend with high pressure settling over the region.
Onshore flow returns next week for a return of closer to normal
temperatures but continued dry conditions into next week.
&&
.SHORT TERM /TODAY THROUGH SATURDAY/...
Latest satellite imagery shows high clouds moving over Western
Washington early this morning, which should help limit fog formation
this morning. An upper-level zonal pattern will remain over the
region through Friday afternoon. A weak system system moving
northeast into British Columbia will clip portions of northern
Western Washington and bring the chance for light showers for the
North Coast, Olympic Peninsula, and Whatcom County today into
Friday. Today`s high temperatures will be in the upper 50s to low
60s along the coast and mid to upper 60s. Warmer and drier
conditions Friday into Saturday as surface high pressure builds over
the region. High temperatures will warm into the low 60s along the
coast and upper 60s to low 70s in the interior. Additionally, a
thermal trough will build along the coast on Saturday, leading to
surface winds to switch offshore. 29
&&
.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
Ensemble guidance remains consistent with high pressure in place
over the region with a thermal trough remaining over the area.
This will bring light offshore flow to the region and maintain
temperatures above normal on Sunday. With the thermal trough
pushing eastward and a return to onshore flow, expect to see
temperatures trend a few degrees cooler for the start of next
week with increased morning clouds. Dry conditions are likely to
continue through at least the middle of next week.
&&
.AVIATION...
VFR with high clouds today. Not expecting much in terms of fog
today. While winds will be light overnight, high clouds passing
through should help limit fog development. A weak weather system
moving into British Columbia will bring light rain to northern
terminals (CLM & BLI) today. Calm to light northerly surface winds
this morning. Surface winds will transition southerly late this
evening.
KSEA... VFR conditions will prevail today with high clouds.
Northeasterly winds have been trending higher than guidance at 5-7
kt early this morning. Winds will transition northwesterly this
afternoon at 5 kt or less. Winds will shift southerly late this
evening around 07Z. 29
&&
.MARINE...
High pressure returns to the waters this week. A passing front
to the north may clip the waters, but won`t do much to increase
any marine weather concerns. A building thermal trough will
bring northerly or offshore breezes over the weekend. Seas
become a little steeper over the coastal waters as a result, but
expect conditions to remain well short of steepness criteria for
an advisory. Otherwise, the breakdown of the high pressure
could bring a stronger westerly push late Monday through Strait
of Juan de Fuca, and represents the next potential chance for
advisory conditions.
&&
.FIRE WEATHER...
Fire weather concerns remain minimal through the next few days.
Developing high pressure aloft this weekend with a thermal
trough building up the coastline will bring warm temperatures
and light offshore flow. This could result in locations in the
Cascades and adjacent valleys seeing minimum RH values approach
30% on Sunday. This will be short lived, with onshore flow
returning early next week to boost humidity values and cool
temperatures.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion