Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
689
FXUS66 KSEW 180926
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
226 AM PDT Sat Apr 18 2026
.SYNOPSIS...
Mostly dry and mild conditions will continue into early next
week, before chances for precipitation increase across western
Washington in the middle of next week. Drying and warming is on
track to return by next weekend.
&&
.SHORT TERM /TODAY THROUGH MONDAY/...
Upper level ridging will allow a warming trend to continue over
the weekend and into early next week as a low pressure system
deepens and drifts southward offshore. This weather system will
draw moisture southward, keeping conditions across western
Washington mostly dry through the short-term. Areas along the
Pacific Coast may see brief showers today, with partly cloudy
skies elsewhere. Temperatures through the weekend will peak in
the upper 60s to lower 70s across much of the region.
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
The aforementioned upper level low will move inland by the start
of next week, with potential wrap around moisture making its way
to southwestern Washington by Monday evening. Chances increase
for more widespread precipitation on Tuesday and Wednesday as
the low slowly progresses inland, with temperatures returning to
near normal in the upper 50s to lower 60s. Ensembles show
potential for drier and warmer conditions to return by the end
of next week as a sharp high pressure ridge builds offshore.
This may allow temperatures to rebound back into the upper 60s
to near 70 degrees.
15
&&
.AVIATION...
An upper level ridge axis will build over W WA today, keeping zonal
flow aloft in place this morning before the afternoon sees SW flow
aloft west of the Sound and westerly to northwesterly to the east of
it. As the ridge axis shifts eastward tonight, widespread south to
southwesterly flow aloft expected. Surface winds largely light and
variable over the terminals, becoming northerly late this morning
with speeds generally 4-8 kts.
VFR conditions areawide and look to remain that way for the TAF
period as high pressure aloft takes root over the area.
KSEA...VFR conditions for the TAF period. BKN high clouds to become
more SCT in the afternoon and remain that way thereafter. Light NE
winds this morning, becoming WNW in the afternoon around 5-7 kt.
18/29
&&
.MARINE...
High pressure weakens slightly as the next week front drops in
from the north into Saturday. This will allow seas over the far
outer coastal waters to increase to 5-7 ft late tonight before
decreasing to 5 ft Sunday afternoon. Seas rise again slightly on
Monday as another weak system traverses the waters. Winds will
be a little stronger over the outer coastal waters during this
timeframe as well, peaking on Wednesday. However, at this time
neither wind nor waves seem to reach any headline criteria.
18
&&
.HYDROLOGY...
River flooding is not expected over the next 7 days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion