Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
533
FXUS66 KSEW 042141
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
241 PM PDT Mon May 4 2026
.SYNOPSIS...Upper level ridge over Western Washington through
Thursday shifting east Thursday night. Dissipating front trying
to move into the area later Friday into Saturday morning.
Another upper level ridge builds Saturday afternoon into Sunday.
Low level flow turning onshore today with varying degrees of
onshore flow through most of the week.
&&
.SHORT TERM /TONIGHT THROUGH WEDNESDAY NIGHT/...Strong high
pressure over the Pacific NW is bringing one more warm day for
western Washington, especially across the interior, with
temperatures in the 70s to lower 80s. The coast is cooler and in
the 60s dues to NW onshore flow. Tuesday will be similar with
marine clouds and cooler conditions along the coast.
Temperatures in the interior will lower a few degrees but we`ll
still see highs in the mid to upper 70s. High pressure remains
in control moving into Wednesday, leading to more dry and mild
weather. Stronger onshore pushes will bring interior temps down
and few more degrees with highs in the lower 70s. 33
&&
.LONG TERM /THURSDAY THROUGH MONDAY/...Dry and mild weather will
extend into Thursday due to high pressure over the region. A
weak front will cross the area on Friday/Friday night for a
chance of rain. However, the probabilities of exceeding 0.10"
of rain over the area is low or less than 10%. Most areas may
only see a trace or a few hundredths if anything. Broad high
pressure rebuilds over the weekend and into early next week for
another dry period of weather. Interior temperatures will
track a few degrees warmer than average and in the 70s. NW
winds will keep the coast cooler and in the 60s. 33
&&
.AVIATION...North to northeast flow aloft continues with an
upper ridge located offshore with southwesterly surface flow 5-9
kts area wide. VFR conditions will prevail across the interior
this afternoon. With stronger onshore flow expected to resume
overnight, expect that stratus will spread into the interior
with IFR conditions expected across much of the interior
lowlands on Tuesday morning. A return to VFR cigs are expected
by mid to late morning, generally after 15Z.
KSEA...VFR for the rest of today and much of this evening. IFR
stratus expected to return around 10Z-14Z Tuesday, breaking out more
completely after 16Z. Surface wind light and variable becoming W/SW
7 to 10 knots this afternoon then light southerly tonight.
21
&&
.MARINE...A thermal trough will continue shifting inland today
for a return to onshore flow. Varying degrees of onshore flow
will then persist through the week as a surface ridge remains
anchored offshore with lower pressure inland. Small craft
advisory westerlies are likely in the central/east strait each
of the next several afternoons and evenings.
21
&&
.HYDROLOGY...No river flooding in the next 7 days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory until 5 AM PDT Tuesday for Central U.S.
Waters Strait Of Juan De Fuca-East Entrance U.S. Waters
Strait Of Juan De Fuca.
&&
$$
NWS SEW Office Area Forecast Discussion