Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
564
FXUS66 KSEW 182123
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
223 PM 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 through the middle of the week. Drying and warming
conditions may return by next weekend.
&&
.SHORT TERM /TONIGHT THROUGH MONDAY/...
Upper level ridging will continue over western Washington
allowing for warmer and drier conditions throughout the rest of
the weekend. High temperatures this afternoon have been
generally in the upper 60s with some locations closer to the
foothills in the low 70s. Some mid to high clouds have been
streaming in overhead with a mix of sun. Progressing into
Sunday, generally the same set up with temperatures a touch
warmer across much of the area with likely the warmest
temperatures we`ve seen this year thus far with temps in the mid
70s, even upper 70s for locations in the Cascade foothills. The
same weather trend will continue into Monday, with more places
seeing low to mid 70s - with areas along the water seeing more
upper 60s.
&&
.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...An upper level low
will move inland near Oregon which could allow wrap around
moisture through Washington. Precipitation chances start to
increase more so Tuesday into Wednesday as the low moves further
inland. Temperatures look to return to normal during this time,
in the upper 50s to lower 60s. Some ensembles are starting to
key into warmer and drier conditions returning near the end of
the week and into the weekend, potentially back in the upper 60s
to lower 70s.
Mazurkiewicz
&&
.AVIATION...High pressure over the region today will shift east
on Sunday, while low pressure tracks south offshore. Winds aloft
are west to southwest. Overall, mainly a mix of mid and high
clouds over the area with VFR conditions. 33
KSEA...VFR conditions will prevail tonight through Sunday. Light
winds becoming N/NE by 03Z. 33
&&
.MARINE...Light winds over the waters with high pressure. Low
pressure will track south over the offshore waters on Sunday
with offshore flow over western WA. Onshore flow resumes on
Tuesday as the low weakens further then shifts inland. Seas
will build over 10 ft on Wednesday over the outer coastal
waters. 33
&&
.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