Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
897
FXUS66 KSEW 070832
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
132 AM PDT Wed Oct 7 2026
.SYNOPSIS...
Zonal flow aloft continues as high pressure remains parked over
the Great Basin. Morning fog and stratus will continue likely
until Thursday morning, where it will become less widespread.
Sunny afternoons are expected, with seasonably warm temperatures.
The next chance for rain appears to be Friday as a weak front
arrives.
&&
.SHORT TERM /TODAY THROUGH FRIDAY/...
Fog has become well established throughout the majority of Puget
Sound early this morning and will persist through the rest of
the morning hours. There is going to be a light offshore
gradient today, which should lend itself to a slightly earlier
dissipation time than the previous few days. This offshore
gradient will also cause a minor dip in the relative humidity
this afternoon in the Cascades and valleys. Today`s highs will
be in the upper 60s, climbing to the low 70s on Thursday.
The system moving in on Friday will be weak, and the expected
QPF is minimal around a few hundredths of an inch across the
Cascades and northern portions of Puget Sound. While the
precipitation won`t last very long, the pattern change will
usher in cooler temperatures, with highs on Friday knocked back
down to the low 60s. Snow levels drop to around 5000 ft late
Friday night, so the higher terrain particularly in the North
Cascades may see a dusting of snow. Expect breezy winds along
the coast, Strait of Juan de Fuca and waterfront areas of Puget
Sound on Friday.
21
&&
.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
Overnight lows will be decreasing over the weekend as the
pattern becomes focused on low pressure over the NW. Saturday
morning lows will be in the upper 30s across the Cascade passes,
and low 40s in the foothills. The lows decrease a few degrees
more come Sunday morning. Stay tuned to the forecast as it
relates to frost and freeze potential for agricultural concerns
and sensitive vegetation.
Cooler temperatures look to continue into early next week as low
pressure churns in the Gulf of Alaska. Some of the models depict
another chance at rain on Tuesday into Wednesday, but the
ensembles are mixed on exact placement of the low and resultant
weather systems.
21
&&
.AVIATION...
Upper level ridging will remain over the region with westerly
flow aloft becoming more northwesterly by tonight. Low clouds/fog
have already developed across Puget Sound this morning and have
brought IFR to LIFR conditions to the majority of the Puget Sound
terminals. Elsewhere, conditions remain VFR. Expect fog to continue
to expand in coverage through the early morning hours and for
predominantly IFR to LIFR conditions to persist through late
morning. Fog will then gradually scatter by late morning, with
more widespread VFR conditions likely to return between 18-21Z.
Light northerly surface winds this morning will increase to
5-10 kt this afternoon.
KSEA...LIFR conditions at the terminal in fog this morning.
Predominantly LIFR ceilings are expected through 18Z before fog
gradually lifts and scatters. A return to VFR conditions is
expected by this afternoon. Northerly winds becoming light early
this morning will see an uptick in speeds to 5-10 kt and a
shift to the northwest this afternoon between 19-21Z.
14
&&
.MARINE...
Fog remains the primary marine impact over the area waters
early this morning as areas of dense fog have already developed
across the eastern Strait of Juan de Fuca and pushed into
Admiralty Inlet, the Northern Inland Waters, and portions of
the Puget Sound waters. Latest satellite imagery also shows fog
over the waters just off of the North Coast and fog pushing down
into the western Strait this morning. Expect areas of fog to
reduce visibilities down to 1NM or less through the morning
hours. Visibilities will then improve as fog slowly scatters
into this afternoon.
High pressure will remain situated over the coastal waters the
next few days, while a thermal trough builds northward along the
Washington coast today. This will continue to promote northerly
winds across the coastal waters into Thursday. Northerly winds
may become gusty to 25 kt at times across the inner and outer
coastal waters off of Grays Harbor this afternoon and again
Thursday afternoon, but expect the stronger, more sustained
winds to generally remain south of the area. Onshore flow will
return by Thursday evening, with guidance indicating a 30-50%
chance of westerly winds exceeding small craft strength along
the central and eastern Strait of Juan de Fuca. A frontal system
will then move into the area waters Friday into Saturday, bringing
the likelihood (>80% chance) of small craft strength winds to
the coastal waters and the Strait of Juan de Fuca. Seas will
build in the system`s wake, with latest GEFS probabilities
indicating a 60-80% chance of seas exceeding 10 ft across the
coastal waters by Friday night.
Winds will ease and seas will gradually subside through the day
on Saturday as the system exits the area. High pressure will
then build back into the coastal waters by Sunday, while a
thermal trough expands northward along the coast again.
14
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion