Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
313
FXUS66 KSEW 191044
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
244 AM PST Mon Jan 19 2026
.SYNOPSIS...
A stable and strong upper level ridge will keep conditions dry
through mid week. A weak system may bring light precipitation by
the end of the week and into the weekend.
&&
.SHORT TERM /TODAY THROUGH WEDNESDAY/...
A strong upper level ridge will continue to keep conditions
benign and dry across western Washington. Areas of fog are
expected this morning across the area, especially in areas near
the water. High temperatures this afternoon will generally be in
the upper 40s with some locations in the low to even mid 50s.
Upper level ridging continues through Wednesday, with fog
coverage each morning - burning off by the afternoon.
Temperatures will slightly cool Tuesday and Wednesday, in the
mid to upper 40s for much of the area. Overnight lows trend
in the low 30s to mid 30s..with areas along the water and
especially South Sound seeing temps below freezing.
&&
.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...Confidence is
still low on the long term but latest ensemble guidances shows a
weak system on Thursday becoming more dry as it brushes over the
area. Ensemble guidance is also showing more drier solutions
over the weekend, with another upper level ridge building
offshore. Confidence remains low considering it is rather far
out but it looks like we could remain dry into the weekend. For
now have included a chance of PoPs in the forecast.
Mazurkiewicz
&&
.AVIATION...
High pressure over the region will continue to promote
northerly flow aloft through the TAF period. Latest satellite
imagery shows areas of fog slowly expanding across portions of
the interior early this morning. Conditions across the terminals
are primarily VFR for terminals outside of fog and IFR to LIFR
for terminals in fog. With temperatures near and just below
freezing, expect some areas of freezing fog this morning as
well, especially along the south Sound. Expect fog to lift by
the late morning/early afternoon hours for a return to more
widespread VFR conditions. Winds are light and variable across
the area this morning at 5 kts or less. Winds will remain light,
primarily at 3-7 kts, out of the north for interior terminals
today and out of the east/northeast for terminals more susceptible
to offshore flow, like KHQM and KCLM. Another round of fog will
be possible on Tuesday morning.
KSEA...VFR conditions with light northerly winds at 5 kt or
less. There remains roughly a 20-30 percent chance of fog
making it into terminal this morning between 12-18Z. Conditions
could drop to IFR/LIFR should fog move in, but expect a return
to VFR conditions by 18Z. Winds will be out of the north/northeast
at generally 3-7 kt.
14
&&
.MARINE...
High pressure will persist over the coastal waters through the
first half of the week, with a thermal trough situated along
the coast. This will continue to promote offshore flow through
at least Wednesday. A weak frontal system may approach the
waters on Thursday, allowing for flow to briefly turn back to
onshore. This will remain short-lived, however as high pressure
will build back into the region by Friday, bringing another
round of offshore flow.
Seas will hover between 4-6 ft through much of the week. Fog
will be possible across the interior waters this morning and
again on Tuesday morning and may bring visibilities down to 1
nautical mile or less at times.
14
&&
.HYDROLOGY...
No river flooding in the next 7 days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion