Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
959
FXUS66 KSEW 040320
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
820 PM PDT Fri Jul 3 2026
.SYNOPSIS...Weak troughing remaining over the area into Saturday
with cloudier and cooler conditions. Upper level ridge building
into the area Sunday into Monday with warmer and drier
conditions over the region. Weak troughiness returns midweek
with temperatures remaining around normal.
&&
.SHORT TERM /TONIGHT THROUGH SUNDAY NIGHT/...Partly cloudy
skies this afternoon as a front dissipates over western
Washington. With low level flow across much of the area, will
continue to see a mix of sun and clouds throughout the evening
hours. Afternoon high temperatures will warm in the low to mid
70s.
Little change in the pattern heading into Saturday, as we will
see a slight increase in onshore flow resulting in marine
stratus over the interior. The day will start off cloudy but
this marine layer will dissipate into the afternoon, leaving
areas of clouds and sun throughout the evening. Areas along the
coast could see mid to high level clouds across majority of the
day. High temperatures will remain in the low 70s across much
of the interior, with locations on the coast seeing high
temperatures in the low 60s. Winds may become slightly breezy
in the Northwest Interior, with potential to see occasional
gusts up to 20 to 25 mph. Winds will be slightly stronger near
Whidbey Island.
Upper level ridging rebuilds back into western Washington on
Sunday, bringing warmer and drier conditions. Temperatures on
Sunday will warm into the mid 70s, with some areas in the
Southwest Interior seeing temperatures in the upper 70s / lower
80s.
Minor (Yellow) HeatRisk (for those extremely sensitive to heat)
will continue to remain across most of the interior areas
throughout the short term.
&&
.LONG TERM /MONDAY THROUGH FRIDAY/...Upper level ridging
will continue over the area with temperatures warming even
further on Monday. High temperatures across the area look to
warm into the low to mid 80s for much of the interior. Areas
along the coast will see temperatures in the mid to upper 60s,
with mostly clear skies. There is increasing chances (25-35%)
for Moderate (Orange) HeatRisk east and south of the Puget Sound
on Monday with these warmer temperatures.
Ridge will shift eastward on Tuesday, allowing for temperatures
to slightly decrease but remain on the warmer side, in the upper
70s.
A weak system looks to brush over the area on Wednesday for a
chance of rain along the coast, the Olympics, and the North
Cascades. Will see increased cloud cover with high temperatures
in the low 70s. Troughiness will continue throughout the
remainder of the week with onshore flow. Temperature`s look to
remain in the low to mid 70s through Friday.
&&
.AVIATION...VFR across the board this evening, with northerly winds
picking up and moving toward central Puget Sound terminals. Those
terminals will be going northwest through much of the night before
turning back around to the southwest tomorrow morning. Another round
of marine stratus looks to enter the area tonight into Saturday
morning, with probabilities of 50 to 70% of MVFR ceilings. Low
ceilings will likely linger areas along the coast (KHQM KCLM).
Interior terminals are likely to scatter out after 17Z.
KSEA...VFR conditions at the terminal this evening with winds that
are becoming more northwesterly. Over the next hour or two, expect
the northerly winds to arrive at the terminal between 6-8 kts. This
will continue until around 12Z tomorrow before becoming
southwesterly again. Latest guidance shows around a 30-45% chance of
MVFR ceilings generally around 10z-17z. VFR looks to rebound
afterwards in the afternoon and lasting throughout the evening
hours.
21
&&
.MARINE...Surface high pressure will continue over the
northeastern Pacific, maintaining onshore flow throughout most
of the forecast period. Diurnally driven westerlies will
continue likely each afternoon/evening throughout the Strait of
Juan De Fuca. A small craft advisory remains for this afternoons
push. Additional headlines will be likely for more consecutive
pushes each day. A weak front will move over the waters tomorrow
with no impacts. High pressure will continue along with a weak
front midweek.
Seas remain 5 feet or lower through Saturday and will build to
8-10 feet by Sunday. Seas will subside below 10 feet on Monday.
&&
.FIRE WEATHER...Even with the slight warming trend into next
Monday the low level onshore pattern will remain intact. This
will keep good overnight relative humidity recoveries in the
forecast and help subdue fire weather concerns despite the
warmer temperatures. Another front in the middle of next week
will bring a chance of showers to portions of the mountains and
the coast keeping fire weather concerns at a minimum.
Mazurkiewicz
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory until 5 AM PDT Saturday 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