Marine Weather Net

Cape Flattery to Cape Shoalwater WA between 150 and 250 NM Offshore Forecast


TODAY

E
WINDS
< 10
KNOTS

TONIGHT

E
WINDS
< 10
KNOTS

FRI

VARIABLE
LESS
THAN
10 KNOTS

FRI NIGHT

SSW
WINDS
5 - 15
KNOTS

The Marine Weather Forecast In Detail:
PZZ900 Forecast Issued: 247 AM PDT Thu Jul 07 2022

Today...Se Winds Less Than 10 Kt. Seas 3 To 4 Ft.
Tonight...Se Winds Less Than 10 Kt, Becoming Variable. Seas 3 To 4 Ft.
Fri...Variable Winds Less Than 10 Kt, Becoming Sw. Seas 3 To 4 Ft.
Fri Night...Sw Winds 5 To 10 Kt, Becoming S To Sw 5 To 15 Kt. Seas 3 To 4 Ft. Chance Of Rain.
Sat...S To Sw Winds 5 To 15 Kt. Seas 3 To 5 Ft.
Sat Night...W To Sw Winds 5 To 10 Kt, Becoming Sw 5 To 15 Kt. Seas 3 To 5 Ft.
Sun...Sw Winds 5 To 15 Kt. Seas 4 To 6 Ft.
Sun Night...W To Sw Winds 5 To 15 Kt. Seas 4 To 7 Ft.
Mon...Sw Winds 5 To 15 Kt. Seas 5 To 7 Ft.
Mon Night...W To Sw Winds 10 To 15 Kt, Becoming W To Nw. Seas 6 To 7 Ft.
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Area Forecast Discussion
National Weather Service Seattle WA
759am PDT Thu July 7 2022

Synopsis
An upper level low will remain offshore through the day, before moving into British Columbia tonight into Friday. Showers will taper throughout the day for drier conditions on Friday. A weak disturbance then looks to brush the region over the weekend before an upper level ridge builds into the region early next week and brings dry weather and warming temperatures.

.UPDATE /TODAY/...A fairly quiet day is expected across the region. Some light shower activity is currently noted across the central/northern Cascades and the north interior as well as along the southwestern coast. Expect pockets of light showers throughout the day across western WA, with a slight chance of a thunderstorms across the north Cascades. The rest of the forecast detailed below is in good shape and no further updates are planned this morning.

-Wolcott-

Short Term - Today through Saturday
An upper level low will remain offshore today before moving into British Columbia tonight into Friday. This will keep chances of light showers in the forecast across Western Washington today, though expect to see an overall drying trend throughout the day as showers taper. Radar early this morning does show some light showers moving northward across the region as of 2AM/9Z. While most thunderstorm activity looks to generally remain east of the Cascade crest, have kept mention of a slight chance of thunderstorms in the forecast this afternoon for the far northern Cascades. Afternoon highs today will be in the upper 60s to mid 70s across the interior and mid 60s along the coast.

Drier conditions are expected Friday and Saturday as the aforementioned low continues to move inland and troughing across the Pacific Northwest weakens. Temperatures will be in the upper 60s to mid 70s for areas across the interior and in the mid 60s along the coast. Areas of patchy fog will be possible during the morning hours Friday and Saturday as onshore flow continues and the airmass remains moist in the low levels. 14

Long Term - Sunday Through Wednesday
A weak disturbance looks to clip the area on Sunday. This looks to bring another round of light showers to the region- primarily for areas along the coast and northern portions of the forecast area. Temperatures will remain near normal, with the interior expected to be in the mid 70s and the coast expected to be in the mid to upper 60s.

Both deterministic and ensemble guidance continue to suggest an upper level ridge building into the region by early next week, allowing for mid level heigheights to climb across Western Washington and for temperatures to warm above seasonal norms. Latest ensemble clusters still hinting at the ridge axis moving across Western Washington on Monday and shifting inland across the intermountain west by Tuesday. While there is still quite some spread amongst ensemble guidance regarding the temperatures, the latest NBM 4.1 guidance does continue to suggest about a 70 to 75 percent chance of temperatures climbing above 80 degrees for areas south of the Sound by Monday and a 75 percent chance of temperatures climbing above 80 degrees for areas from Seattle southward by Tuesday. However, even with temperatures climbing above normal early next week, a heat event still does not appear likely for Western Washington at this time.

Upper level troughing then looks to regain influence across the Pacific Northwest on Wednesday, allowing for temperatures to cool back to seasonal norms. Confidence still remains low regarding the return of precipitation to the region, however, as many ensemble members continue to reflect a dry forecast for now. 14

Marine
Light onshore flow will continue for the next few days with high pressure offshore and lower pressure inland. Marginal small craft advisory strength west winds are expected in the Central Strait of Juan de Fuca and East Entrance the next few nights.

A weak front will approach from the west Friday and Saturday then dissipate off the coast on Sunday. The main affect of this feature will be to turn the winds over the Coastal Waters a bit more southerly. Low level flow will turn more northerly early next week as a thermal trough develops along the coast to the south. 16

Hydrology
The daily hydrology discussion has ended until the start of the next rainy season; it will only be updated as needed until then.

NOAA Seattle WA Office: Watches - Warnings - Advisories
WA...None. PZ...Small Craft Advisory from 5pm this afternoon to 3am PDT Friday for
Central U.S. Waters Strait Of Juan De Fuca-
East Entrance U.S. Waters Strait Of Juan De Fuca.