Marine Weather Net

Cape Flattery to Cape Shoalwater WA between 60 and 150 NM Offshore Forecast


TODAY

SSE
WINDS
20 - 30
KNOTS

TONIGHT

SSW
WINDS
15 - 25
KNOTS

FRI

SSE
WINDS
5 - 15
KNOTS

FRI NIGHT

N
WINDS
5 - 15
KNOTS

The Marine Weather Forecast In Detail:
PZZ800 Forecast Issued: 847 AM PDT Thu Mar 28 2024

Today...S To Se Winds 20 To 30 Kt. Seas 13 To 17 Ft. Scattered Showers And A Chance Of Tstms.
Tonight...S To Sw Winds 15 To 25 Kt. Seas 10 To 16 Ft. Scattered Showers.
Fri...S To Se Winds 5 To 15 Kt, Becoming E 5 To 10 Kt. Seas 7 To 12 Ft. Chance Of Rain.
Fri Night...N Winds 5 To 15 Kt, Becoming N To Nw 10 To 20 Kt. Seas 6 To 8 Ft.
Sat...N To Nw Winds 15 To 25 Kt. Seas 6 To 8 Ft.
Sat Night...Nw Winds 20 To 30 Kt. Seas 7 To 11 Ft.
Sun...N To Nw Winds 15 To 25 Kt. Seas 6 To 11 Ft.
Sun Night...Nw Winds 10 To 20 Kt. Seas 6 To 8 Ft.
Mon...Nw Winds 10 To 15 Kt, Becoming W To Nw 5 To 10 Kt. Seas 6 To 7 Ft.
Mon Night...W Winds 5 To 10 Kt, Becoming Sw 5 To 15 Kt. Seas 6 To 7 Ft.
SHARE THIS PAGE:           
Area Forecast Discussion
National Weather Service Seattle WA
916am PDT Thu Mar 28 2024

Synopsis
Low pressure spinning off the coast will maintain scattered showers and isolated thunderstorms today. Showers will gradually subside through the day Friday giving way warmer and drier conditions as high pressure builds into the area, resulting in above normal temperatures by Sunday and Monday. A cold front is poised to move southward across the Pacific Northwest Tuesday, bringing a return to a cooler and wetter pattern into the middle part of next week.

Short Term - Today through Saturday
Scattered showers and isolated thunderstorms will continue across western Washington through the day today as a low pressure system continues to spin offshore and eject shortwave perturbations across the region. The overall forecast remains on track this morning, with radar showing the heaviest shower activity moving along the coast as of 16Z. The previous discussion follows below, with updates made to the aviation and marine sections below. 14

A vertically-stacked and occluded low pressure center continues to spin just west of 130 W offshore with yesterday's occluded front having stalled over eastern Washington. A surface trough will pivot onshore later this afternoon amidst several shortwave perturbations and vorticity maxima pivoting around the occluded upper low. These will maintain scattered and disorganized showers with isolated thunderstorms through much of the day, largely similar to those observed yesterday. Hazards from these will once again include small hail/graupel, brief heavy downpours, gusty winds, and dangerous cloud-to-ground lightning. Remember, when thunder roars, go indoors!

Similar temperatures today as to yesterday with highs in the low to mid 50s. Snow levels today will hover around 3000 to 3500 feet with light snow accumulations of 1-3 inches at the Cascade Passes will be possible. Total rainfall amounts today will be on the lighter side - generally a quarter of an inch or less across the lowlands, with 1 to 2 inches across the southern Olympics.

Meanwhile, a stronger shortwave trough will pivot southward through the longwave trough over the eastern Pacific, prompting cyclogenesis of a new surface low, which will overtake the current one, pulling the focus for scattered showers and thunderstorms south of the area through the day Friday as the only remaining focus for showers isolates to the Cascades and Olympics. High temperatures begin rising Friday as mid-level heigheights rise with mid to upper 50s forecast.

Upper-level ridging will build south and east across the Pacific Northwest on Saturday with pleasant conditions featuring clear skies and highs in upper 50s to near 60.

Long Term - Sunday Through Wednesday
Warm and dry weather will continue Sunday into Monday, with the high temperatures peaking Monday as the upper-level ridge axis moves overhead. Snow levels also rise closer to 7000 feet by late Monday. While forecast highs aren't nearing any record highs Monday, the forecast doesn't look to be a joke of any sorts for April Fools' Day with a high likelihood for max temperatures above 60 Monday for the interior and Puget Sound lowlands.

The upper-level ridge begins to flatten into Tuesday as the upper low previously along the coast cuts off over the Desert Southwest. While some disagreement continues over how cutoff this low will become and how long it will linger to our south, better agreement appears to exist in the amplification of a new developing trough across British Columbia into the Pacific Northwest by Wednesday. At the surface, a cold front looks to slide southward across the region Tuesday into Tuesday night, ushering in a return to cooler and wetter weather by Wednesday.

Davis

Marine
A surface low continues to meander offshore, with gales over the coastal waters this morning. Elevated S/SE winds will continue throughout majority of the day, with small craft advisories still in place for the Eastern Entrance of the Strait, Admiralty Inlet, and the Northern Inland Waters. Winds over these areas will likely remain at small craft advisory threshold until Friday, before the surface low drifts southward, which will let winds over the waters ease into the weekend.

High pressure looks to return into the weekend, with both winds and seas easing, headlines will be allowed to expire.

Combined seas this morning around 12 to 15 feet and will generally maintain that height through the day. Seas look to drop below 10 feet Friday morning, and continue to lower to around 3 to 6 feet for the weekend.

Mazurkiewicz/McMillian

Hydrology
No river flooding is forecast over the next 7 days.

NOAA Seattle WA Office: Watches - Warnings - Advisories
WA...None. PZ...Small Craft Advisory until 11am PDT Friday for
Grays Harbor Bar

Small Craft Advisory until 5am PDT Friday for
West Entrance USA Waters Strait Of Juan De Fuca.

Small Craft Advisory until 8am PDT Friday for
Admiralty Inlet
East Entrance U.S. Waters Strait Of Juan De Fuca-
Northern Inland Waters Including The San Juan Islands.

Gale Warning until 11am PDT this morning for
Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-
Coastal Waters From Cape Flattery To James Island Out 10 Nm-
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.

Small Craft Advisory until 11am PDT Friday for
Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-
Coastal Waters From Cape Flattery To James Island Out 10 Nm-
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.