FXUS66 KSEW 142128
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
228 PM PDT Wed Apr 14 2021

.SYNOPSIS...Upper level high pressure strengthens through the end
of the week with the air mass warming steadily each of the next
several days. The warmest temperatures so far this season are
expected late in the week as the ridge expands overhead. A weak
disturbance arrives early next week to bring a return of rain
chances and cooler temperatures.

&&

.SHORT TERM /TONIGHT THROUGH SATURDAY/...High pressure and
offshore flow continues across western WA today leading to warm
and dry conditions. Temperatures were mostly in the 60s across the
region this afternoon under clear and sunny skies. We`ll see one
more cool night tonight with a few spots dipping back into the 30s
(like Hood Canal and SW Interior). Temperatures will nudge upwards
a few degrees each day then peak over the weekend. By Saturday,
most spots in the interior will see 70s with a few low 80s
possible - a good 20-25 degrees warmer than average. The coast
will be cooler and in the 60s (although still above average) due
to NW flow. 33

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...The ridge will start to
weaken/flatten over the Pac NW on Sunday but we should still see
one warm and dry day (similar to Saturday). The flow will then
flip back to onshore on Monday while a weak frontal system moves
inland. There`s not much rain associated with this system. A
stronger onshore push will likely bring more clouds and cooler
conditions Monday night and Tuesday. Weak high pressure may
rebuild over the region toward mid week for more dry and mild
weather. 33

&&

.AVIATION...East-northeasterly flow aloft as an upper ridge
strengthens over British Columbia with an upper low over the Great
Basin. VFR for the period. Breezy north winds this afternoon at 10
to 20 knots for most with a few gusts of 20 to 25 knots possible.
Winds will become lighter this evening at 5 to 10 knots with north
winds through Thursday with offshore flow.

KSEA...VFR through the period. North winds of 10 to 15 knots through
this afternoon, with a few gusts of 20 to 25 knots possible. Winds
will become 4 to 8 kts tonight through Thursday with light offshore
flow.

&&

.MARINE...Northerly flow will continue for the majority of waters
through Thursday with high pressure over the area. Small Craft
Advisory winds for the central and southern coastal waters through
this evening for increasing north winds. Winds will ease tonight
through Thursday for light northerly winds. Offshore flow through
the weekend with mainly light winds over the waters. Seas through
the period will be below 10 feet.

JD

&&

.HYDROLOGY...River flooding not expected during the next 7 days.

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory until 9 PM PDT this evening for Coastal
Waters From James Island To Point Grenville 10 To 60 Nm-
Coastal Waters From James Island To Point Grenville Out 10
Nm-Coastal Waters From Point Grenville To Cape Shoalwater
10 To 60 Nm-Coastal Waters From Point Grenville To Cape
Shoalwater Out 10 Nm.

&&

$$

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