Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
934
FXUS66 KSEW 030351
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
851 PM PDT Wed Apr 2 2025
.SYNOPSIS...A high pressure ridge will build inland Thursday
through Saturday, bringing dry and warmer conditions. Wet
conditions are on track to return by the end of the weekend and
into early next week as troughing returns.
&&
.UPDATE...Forecast remains on track this evening as shower
coverage is becoming less widespread and generally pushing into
the mountains and a few near the coast. It`ll still be a quite
cool night and temperatures may be cold enough for a few patches
of frost south of Puget Sound through Lewis County. No other
concerns this evening, with the previous short/long term sections
following.
&&
.SHORT TERM /TONIGHT THROUGH SATURDAY/...Onshore flow prevails
across western WA today with a broad trough across the West.
Temperatures will be chilly overnight and in the 30s for most
areas, with temps near freezing around the south sound.
We`re under dry, N flow, on Thursday as a ridge builds offshore.
Expect more sunshine and slightly warmer temperatures with highs
in the mid 50s.
High pressure shifts inland through Saturday for dry and mild
conditions. Morning lows will stay chilly and in the 30s.
Afternoon highs will reach the 60s to lower 70s with plenty of
sunshine. 33
.LONG TERM /SUNDAY THROUGH WEDNESDAY/...High pressure will shift
eastward on Sunday as a trough moves in from the west. Clouds will
increase through the day with rain, from the next incoming
system, reaching the coast during the afternoon. Expect one last
dry day in the interior with highs in the lower to mid 60s.
Precipitation spreads farther inland Sunday night as the cold
front moves in. We`re under moist, westerly flow, through early
next week for more rain and locally windy weather. 33
&&
.AVIATION...Northerly flow aloft as a offshore ridge nudges closer
to western Washington. Widespread VFR conditions this evening and,
for most terminals, expected to persist throughout the TAF period.
Locations more prone to lower cigs, such as OLM, HQM and PWT, may
see cigs dip into MVFR overnight/early Thursday morning thanks to
lingering low level moisture as the aforementioned ridge sets up.
Showers continue to dissipate this evening, likely fizzling out
completely tonight. Winds in process of shifting direction at the
time of this writing...so while most terminals still showing west to
southwesterly winds, seeing the northernmost terminals already
switching to north to northwesterly with speeds generally 4-8 kts
now. Speeds expected to slow further overnight, easing to 5 kts or
less.
KSEA...VFR conditions expected at the terminal for the TAF period. W
winds 4 to 8 knots still have a little bit of time to switch more
northwesterly before 06Z, when direction is expected to switch back
to a more southerly component throughout the rest of the overnight
and into Thursday morning. While VFR will likely continue through
the TAF period, but there is a 35% chance of low MVFR clouds to
develop early Thursday morning.
Mazurkiewicz/18
&&
.MARINE...Surface high pressure will continue to build offshore,
easing marine winds and seas through the rest of the week. Benign
conditions will continue through the weekend, before a frontal
system approaches the waters Sunday evening. Here, we will likely see
elevated winds and seas return to the coastal waters.
Combined seas 5 to 7 feet this afternoon will start to taper down
to 3 to 5 feet through the rest of the week and into the weekend.
Seas will start to gradually build upwards by Sunday ranging from
9 to 12 feet.
Mazurkiewicz
&&
.HYDROLOGY....No river flooding is expected over the next 7 days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion