Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
098
FXUS66 KSEW 012112
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
212 PM PDT Wed Jul 1 2026
.SYNOPSIS...
Cool and cloudy conditions will continue through Friday as
onshore flow persists. A weakening cool front will bring chances
for light rains to the coastal and mountain regions Thursday
with only slight chances across the lowlands. Improving
conditions are expected Friday afternoon through the weekend
with decreasing cloud cover and temperatures returning to near
normal. Dry weather and seasonable temperatures will continue
into early next week.
&&
.SHORT TERM /TONIGHT THROUGH FRIDAY NIGHT/...
Considerable cloud cover persists early this afternoon across
much of Western WA, though clearing has begin pushing into the
coastal regions. Patchy breaks in the clouds have allowed for
some filtered sunshine across the lowlands with temperatures
climbing into the 60s as of 1pm. Continued mostly cloudy skies
with a few spotty breaks in the cloud deck are likely through
the remainder of the afternoon and early evening before clouds
redevelop overnight.
On Thursday, a shortwave pushing into British Columbia will drag
a weakening cool front into Western WA, with light rain chances
spreading into the coast and mountain terrain during the day,
and just slight chances (20% or less) across the Seattle urban
corridor. Otherwise, continued cloudy and cool conditions are
expected.
By Friday, heights will begin to climb considerably as ridging
builds into the central and western US. This will allow for an
earlier afternoon clearing trend and encourage afternoon highs
to climb closer to seasonal normals.
&&
.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
Increasing heights over the weekend in response to strengthening
ridging in the Western and Central US will allow for
temperatures to return to near normal early July values.
Meanwhile, morning stratus across the low-lands will tend to
thin and be less persistent than observed over the past week.
Dry conditions and continued seasonable temperatures will
continue into early next week.
&&
.AVIATION...
The northwesterly flow from an upper level trough continues
through the TAF period. Generally VFR conditions prevail this
afternoon through MVFR persists near KPWT and will persist at
least a few more hours. Stratus deck will return overnight with
widespread MVFR conditions expected. Light rain showers will
move into western WA Thursday with best chances affecting KCLM
and KHQM and continued cloudy conditions. Periods of MVFR
conditions are once again expected during the morning hours,
particularly from 12z-18z. South to southwest winds 5 to
10 kt will continue through the period, with a few gusts of 15
to 20 knots possible this afternoon.
KSEA...VFR conditions are expected this afternoon with SCT-BKN
cloud decks between 4-6kft AGL. MVFR conditions are expected to
return overnight with ceilings generally in the 2-3kft range.
Cloudy conditions expected for Thursday with slight chances for
shower activity in the afternoon and evening. Generally light
winds of 5 to 10 knots out of the south expected through the
period.
&&
.MARINE...
Broad high pressure offshore and low pressure inland will continue
today, maintaining onshore flow with steep seas over the outer
coastal waters. A frontal system will cross area waters on Thursday,
weakening the onshore flow and bringing an end to the steep seas
over the outer coastal waters. Thereafter, a low pressure system
will deepen over the Gulf of Alaska, maintaining onshore flow over
the Pacific Northwest. This will result in periods of diurnally
driven westerly pushes through the Strait of Juan de Fuca over the
next week.
A westerly push this evening through the Strait of Juan de Fuca will
generate Small Craft winds through the central and east Strait. A
frontal system Thursday will limit winds over area waters on
Thursday. Additional westerly pushes are favored to occur Friday and
Saturday evenings, and likely once again on Monday and Tuesday. A
weak frontal system will also bring gusty winds to the southern
coastal waters Sunday, with potential for SCA winds (60-70% chance
of gusts over 30 kt).
Steep seas will calm tonight as waves subside, lowering to 3 to 5
feet on Thursday. Seas will gradually build to 6 to 9 feet on Sunday
and Monday, then slowly subside on Tuesday.
&&
.FIRE WEATHER...
Little in the way of fire weather concerns in the week ahead.
Upper level troughing maintaining cool and cloudy conditions
with high relative humidity values and a slight chance for
showers along the coast and mountains on Thursday. Drier,
sunnier, and more seasonable temperatures will begin Friday
continuing into early next week. Low level onshore flow will
moderate daytime minimum RH values and bring in good RH recovery
each night.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory from 6 PM this evening to 2 AM PDT
Thursday for Central U.S. Waters Strait Of Juan De Fuca-
East Entrance U.S. Waters Strait Of Juan De Fuca.
Small Craft Advisory until 6 PM PDT this evening for Coastal
Waters From Cape Flattery To James Island 10 To 60 Nm-
Coastal Waters From James Island To Point Grenville 10 To
60 Nm-Coastal Waters From Point Grenville To Cape
Shoalwater 10 To 60 Nm.
&&
$$
NWS SEW Office Area Forecast Discussion