Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
754
FXUS66 KSEW 262113
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
213 PM PDT Sun Apr 26 2026
.SYNOPSIS...
Mostly dry and mild conditions will continue through much of
next week across western Washington as an upper level ridge
remains situated over the region. Troughing is on track to
return by next weekend, bringing cooler conditions and increased
chances for mountain showers.
&&
.SHORT TERM /TONIGHT THROUGH TUESDAY NIGHT/...
Northerly flow aloft has brought another dry day across western
Washington, with temperatures on track to peak several degrees
above normal in the upper 60s to lower 70s. High pressure will
continue to build onshore tonight into Monday, generating
onshore flow that will allow low clouds to develop along the
coast and filter inland towards the Puget Sound Monday
morning. The onshore flow will bring in cloudy skies across
western Washington, limiting temperatures into the upper 50s to
lower 60s. This system will also bring a slight chance of light
showers along the coast and over the mountains. More of the same
will continue on Tuesday, with a degree or two of cooling under
mostly cloudy skies.
&&
.LONG TERM /WEDNESDAY THROUGH SUNDAY/...
An upper level ridge building offshore will drift closer to the
Washington coastline on Wednesday and Thursday, bringing in a
warming trend with clearing skies. The ridge axis will shift
inland on Thursday, bringing the warmest temperatures of the
week. Highs will peak in the upper 60s to mid 70s across the
lowlands, resulting in areas of Minor (Yellow) HeatRisk east and
south of the Puget Sound.
Models have come into slightly better agreement heading into
next weekend, showing split flow developing aloft as a closed
low drops southward along the coast and the upper level ridge
progresses east of the Rockies. This will likely maintain mild
temperatures across the region, with ensembles maintaining a
slight chance of mountain showers next weekend.
15
&&
.AVIATION...
A ridge will remain offshore with troughing to the east over the
north Great Plains, keeping the flow north/northeasterly, with a
break in the flow Monday as a trough passes offshore. VFR will
continue this afternoon with winds beginning to solidify to the north
at 5-10 kt. Onshore flow picks up tonight into Monday. This
increases the likelihood of MVFR for most interior terminals (and a
higher likelihood of IFR/LIFR along the coast). These ceilings are
expected to linger into much of Monday before receding back towards
the coast in the afternoon/evening. Winds will return to the south
at the surface late tonight (around 5 kt) and into Monday (5-10 kt).
KSEA...VFR through the evening, then a 60% chance of MVFR between
12Z and 18Z. There is a 30% chance that the ceilings briefly drop to
IFR during this period from the marine push. Conditions will become
VFR late Monday afternoon. Winds: North 5-10 kt through the evening,
becoming south 5 kt overnight, and southwest 5-10 kt Monday.
HPR
&&
.MARINE...
High pressure continues over the coastal waters, with lower pressure
to the east. The flow returns to onshore this week with weak pushes
through the Strait of Juan de Fuca. The strongest push in the
guidance is Monday evening, but the probability of winds exceeding
20 kt remains low. Low ceilings in the coastal waters Monday morning
(with pockets of fog) may lower visibilities at times to mariners.
The next potential system may bring breezy winds over the coastal
waters around Friday.
Seas for Sunday hold around 4-6 ft, and increase to 6-8 ft for the
remainder of the week. There is potential for 9-10 ft seas Thursday
and Friday depending on the track of the next system.
HPR
&&
.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