Morton, Washington Weather Forecast Discussion

920
FXUS66 KSEW 270321
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
821 PM PDT Fri Sep 26 2025
.SYNOPSIS...A frontal system will clip the northern portions of
Western Washington into Saturday morning for light rain at
times across northern areas. Otherwise, southwesterly flow aloft
will continue this weekend. A more active weather pattern is
expected with multiple frontal systems next week.
&&
.SHORT TERM /TONIGHT THROUGH MONDAY/...Increasing mid and high
clouds across Western Washington this evening with rain sliding
onshore across the north coast. The front will clip northern
areas into Saturday morning, resulting in light rain at times
for the northern Olympic Peninsula and areas of Skagit County
northwards. Otherwise, continued clouds elsewhere through
Saturday morning with some clearing in the afternoon. No major
forecast updates this evening. Previous discussion below.
Mid and high level clouds are streaming in from the northwest
as onshore flow continues across western Washington. An
approaching frontal system will get caught along the north coast
and portions of the north interior over the weekend, with
mostly clear skies for the rest of the region tomorrow and
Sunday. Highs on Saturday will be in the mid 70s, dropping into
the low 70s on Sunday. Morning clouds are likely on Saturday,
giving way to a mostly clear afternoon and evening. Similar
conditions are forecast on Sunday, but more widespread rain will
arrive in Puget Sound in the evening. Through late Sunday
night, rainfall totals will be around a half of an inch along
the coast and western Olympics, and a few hundredths of an inch
down in the lowlands and Cascade foothills. Rain picks up early
Monday morning into Tuesday for more appreciable totals.
Conditions along the immediate coast and through the eastern
Strait of Juan de Fuca could be breezy late Sunday night into
Monday as that frontal system moves into the area.
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...The next system arrives
Tuesday into Wednesday and looks to be the strongest one of the
week. More widespread southerly winds are expected, with stronger
gusts along the coast. Additionally, rainfall will pick up and
linger throughout Tuesday and Wednesday. There is still a slight
chance for thunderstorms (10-15%) retained in the forecast for the
Pacific coast, and portions of King and Snohomish county on
Tuesday afternoon. Slight chances for thunder continue along the
coast into Thursday. The low pressure system responsible for the
increased weather activity will sit offshore of Vancouver Island
until moving east late in the week. Looking at the cluster
analysis, there are a few models attempting to bring in high
pressure late in the week into next weekend for a break in the
active weather. Confidence in this solution is weak at this lead
time, and will be refined into next week.
Looking at the precipitation forecast from Sunday through late
Thursday night, the lowlands could receive around 2 inches of
rain, while the western slopes of the Olympics range from 4-5
inches, and around 3-4 in the Cascades. This will bring very
appreciable benefits to area fires.
21
&&
.AVIATION...West-southwesterly flow continues aloft with a
frontal system moving into British Columbia and upper ridging
over the Intermountain West. VFR cigs for most areas this
evening, with MVFR cigs along the north coast. MVFR/IFR cigs are
expected to mainly be confined to the coast into Saturday
morning, with mid and high clouds for the interior. Localized
low stratus cannot be ruled out around KPWT and KOLM, but
widespread high clouds will limit fog development. A frontal
system will clip the northern portions of W WA into Saturday,
with light rain mainly for northern Olympic Peninsula sites, as
well as north of KPAE. Otherwise, VFR conditions are expected to
continue for the interior on Saturday, with continued lower
cigs along the coast. Light S/SE surface winds tonight will
transition more westerly Saturday afternoon.
KSEA...VFR conditions through the TAF period. Mid and high
cigs will continue into Saturday AM, before FEW/SCT high clouds
for a period in the afternoon. Light SE winds tonight may become
VRB between 12-18z Saturday, before W/NW winds Saturday
afternoon into the evening. JD
&&
.MARINE...Weak surface high pressure inland will weaken as a frontal
system approaches from the west this weekend. Some lower
ceilings/visibilities with the showers are possible in the coastal
waters Saturday afternoon in the warm sector. While winds decrease
going into Saturday out of the south, seas remain elevated with
coastal waters seeing seas increase 8-11 ft through the weekend. All
but the southern two inner coastal waterway zones remain in a small
craft advisory through Saturday due to high seas.
An additional frontal system will pass through Sunday into Monday.
While seas will range at 7-9 ft Sunday through Monday, there`s a 30-
50% chance that some of the southern parts of the coastal waters,
and the interior waters (particularly East Strait of Juan de Fuca
and Northern Inland Waters) could see wind gusts exceed 20 kt. A
stronger system digging southward from Alaska Tuesday and Wednesday
will likely increase seas up to 10-15 ft Tuesday into Thursday,
produce breezy south winds in the coastal waters, Strait of Juan de
Fuca and interior waters. There is a 30-40% chance that some of the
wind gusts in these areas could approach gale force.
HPR
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory from 6 AM to 5 PM PDT Saturday for
     Coastal Waters From Cape Flattery To James Island Out 10
     Nm.
     Small Craft Advisory until 11 PM PDT Saturday 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.
     Small Craft Advisory from 6 AM to 11 PM PDT Saturday for
     Coastal Waters From Point Grenville To Cape Shoalwater 10
     To 60 Nm.
&&
$$

NWS SEW Office Area Forecast Discussion