Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
669
FXUS66 KSEW 060310
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
810 PM PDT Sun Apr 5 2026
.SYNOPSIS...Warm and dry conditions continue through Monday
with upper level ridging. A passing shortwave Monday evening
will bring breezy conditions and cooler, marine air. Dry
conditions continue through the week but with more seasonable
temperatures. Cool nights may allow for frost and locally
freezing morning lows Wednesday and Thursday.
&&
.SHORT TERM /TONIGHT THROUGH TUESDAY NIGHT/...Quiet weather
overnight with no planned updates. 33
Previous discussion...Mostly sunny skies are bringing us mild
conditions, with mid to upper 50s in the northern interior and
islands, with 60s elsewhere, already near 70 along the coast.
Highs today will be in the mid 60s to low 70s. Lows tonight in
the 40s. Similar conditions tomorrow as well, although cooler
along the coast as onshore flow begins to redevelop. This will
come in the form of a relatively strong marine push Monday
evening. Winds will be a bit breezy, with the strongest winds
through the Strait of Juan de Fuca and Strait of Georgia, and
through the adjacent land areas down into Everett as well. This
will likely create some convergence in the Seattle metro with
southwest winds in the SW interior into the southern Seattle
metro, but expect to remain dry, just cloudier. Lows Monday
night a bit cooler, in the upper 30s to low 40s. Tuesday will
see cooler and more seasonable temperatures as a shortwave
trough into the intermountain west and the area is under the
influence of dry, northwesterly flow aloft. Highs in the mid to
upper 50s. With clearer skies, Tuesday night will be in the low
to mid 30s except near 40 in the metro. Frost will be possible
away from the water and in more rural areas, with temperatures
close to freezing across the Southwest Interior and Chehalis
valley.
&&
.LONG TERM /WEDNESDAY THROUGH SUNDAY/...The pattern remains
fairly steady state with northwesterly flow over the area as a
ridge builds over the northeast Pacific and a closed low near
northern California. This will result in overall more seasonable
temperatures with a very gradual warmup during the week.
Thursday morning may also see some frost potential across the
area but lows warm back up into the 40s by late week. Highs in
the low 60s on Wednesday rise into the mid to upper 60s by
Friday. Models are hinting at a shortwave moving across the area
Saturday coming from the north, but there are significant
timing differences. Slight chances for precipitation re-enter
the forecast Saturday with cooler temperatures, but the chances
for precip are rather uncertain at this point.
62
&&
.AVIATION...High pressure remains in place over the region,
shifting eastward and weakening through Monday as the next
disturbance begins to approach. VFR conditions continue across
the area this evening into tonight with variable high cirrus.
Northerly surface winds have eased from the afternoon, generally
ranging 4-8 kts. Expect VFR conditions across the interior
through the period (with perhaps a few patches of low clouds
around the most prone locations), but IFR ceilings/visibility
return to the coastal terminals after 12z Monday. A wind
reversal will maintain little improvement through the day Monday
for the coast. Southerly winds increasing late Monday morning
across the area, with stronger west winds through the Strait
likely inducing a Puget Sound Convergence Zone Monday night as
onshore flow increases. Not much precipitation, but expect some
increasing clouds with lower ceilings where the zone sets up.
KSEA...VFR is expected tonight into much of Monday with only passing
high cirrus. Northerly surface winds at speeds mentioned above
before, becoming light/variable overnight. Winds become
predominantly southerly by Monday morning. A PSCZ develops late
Monday north of the terminal area with increasing southerly winds.
Low confidence in it drifting south into the terminal area, but this
will need to monitored tomorrow. Cullen/18
&&
.MARINE...Broad high pressure remains in place across the area
through Monday with a weak thermal trough build up along the
west coast, keeping winds northerly. Winds will increase Monday
evening as a front passes by to the north and stronger high
pressure builds in behind it. Small Craft Advisory winds are
expected across the northern sections of the coastal waters, as
well as down the Strait of Juan de Fuca and into Admiralty
Inlet. Winds will continue to turn down into the Puget Sound,
though there is less confidence that Small Craft winds make it
down there. There remains the potential for gales (30-50%
probability) through the Strait of Juan de Fuca, with occasional
gale gusts more likely. Will continue to evaluate a potential
upgrade, but the current headline still stands at this time.
Winds will slowly ease on Tuesday and remain relatively light
through the rest of the week as high pressure remains in place
over the northeast Pacific.
Seas remain 3 to 6 ft through Monday. Seas will then build up to 8
to 11 ft Monday night into Tuesday, and these waves will be steep
with dominant periods of around 8 to 9 seconds. The highest waves
are also likely to be in the northern portions of the outer waters
during this time. Seas look to remain in the 5 to 8 ft range through
the rest of the week.
62
&&
.HYDROLOGY...No river flooding is expected in the next seven
days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory from 2 PM Monday to 2 PM PDT Tuesday for
Coastal Waters From Cape Flattery To James Island 10 To
60 Nm-Coastal Waters From Cape Flattery To James Island
Out 10 Nm-Coastal Waters From James Island To Point
Grenville 10 To 60 Nm-Coastal Waters From James Island To
Point Grenville Out 10 Nm-West Entrance U.S. Waters
Strait Of Juan De Fuca.
Small Craft Advisory from 11 AM Monday to 5 AM PDT Tuesday for
Central U.S. Waters Strait Of Juan De Fuca-East Entrance
U.S. Waters Strait Of Juan De Fuca.
Small Craft Advisory from 5 PM Monday to 5 AM PDT Tuesday for
Admiralty Inlet.
&&
$$
NWS SEW Office Area Forecast Discussion