Cape Flattery to Cape Shoalwater WA between 60 and 150 NM Offshore Forecast
|Tonight...S Winds 15 To 25 Kt, Increasing To 25 To 35 Kt. Seas 5 To 6 Ft, Building To 9 To 15 Ft.|
|Wed...S To Sw Winds 20 To 30 Kt. Seas 12 To 15 Ft. Scattered Showers And Tstms.|
|Wed Night...Sw Winds 15 To 25 Kt. Seas 13 To 18 Ft. Scattered Showers And Tstms.|
|Thu...W To Sw Winds 15 To 25 Kt. Seas 16 To 18 Ft. Scattered Showers And Tstms.|
|Thu Night...Sw Winds 10 To 20 Kt. Seas 15 To 17 Ft.|
|Fri...W To Sw Winds 15 To 25 Kt, Becoming W To Nw. Seas 11 To 15 Ft.|
|Fri Night...S Winds 5 To 15 Kt, Becoming Sw 20 To 30 Kt. Seas 9 To 12 Ft.|
|Sat...W To Sw Winds 15 To 25 Kt. Seas 10 To 12 Ft.|
|Sat Night...S To Sw Winds 15 To 25 Kt. Seas 9 To 11 Ft.|
|Sun...W To Sw Winds 15 To 25 Kt. Seas 9 To 11 Ft.|
|Sun Night...N To Nw Winds Less Than 10 Kt, Becoming Variable. Seas 8 To 10 Ft.|
| 344 PM PDT Tue Sep 22 2020 |
Northern and Central Washington Coastal and Inland Waters - PZZ100
Weak high pressure over the waters today. Strong cold front moving through Wednesday. Weaker systems moving across the area Thursday through Saturday. High seas possible Thursday into Friday.
| Area Forecast Discussion|
National Weather Service Seattle WA
347pm PDT Tuesday September 22 2020
High winds and heavy rain is expected throughout the area starting tonight. Expect an inch or more to fall by Thursday. Rain will remain over the area for the rest of the week. A brief lull may occur on Friday but a shortwave system coming through during the weekend is expected to bring more rain. Improving conditions at the beginning of next week with a ridge over the area.
Short Term - Tonight Through Friday
The small disturbance from this morning has moved out of Western Washington; leaving a brief window of nice weather before the front moves into the area late tonight. As the front approaches the region expect winds to pick up and widespread rain to begin. Coastal areas will be the first to feel the impacts of the front. Winds near the shore are expected to be 30-35 mph with higher gusts. Winds will also be a concern for the the areas adjacent to the Northern Inland waters, where winds may be close to 25 mph near the water. Along with wind, rain amounts and rates will be impactful. One to two inches are likely for the entire area minus the Olympic Mountains during Wednesday. Within the Olympics upwards of 4 inches is likely. Rain will continue through Thursday and Friday. With the highest rain amounts in the Olympics and North Cascades. During days 2 and 3 wind speeds will be decreasing throughout Western Washington. Following the passage of the main frontal system on Wednesday their are a series of small disturbances. With the disturbances and increased instability there is a chance of thunderstorms; mainly on the Olympic Peninsula and near the North Cascades.
Long Term - Saturday Through Tuesday
A short wave wave is expected to move through the area on Saturday to Sunday. This will bring another batch of rain for Western Washington. Rain amounts and rates will not be as high as they were for the system earlier in the week. An additional half an inch of rain is possible for the lowlands and coastal regions. Closer to an inch in the Olympics and Cascades. Starting Sunday night into Monday we will start to move past this wet pattern as a ridge moves into place. Sky cover will gradually be improving throughout Monday, by Tuesday expect mostly clear skies. With this ridge and sky clearing we may be seeing those final summer like temperatures. As of today, models are suggesting that mid 70s are possible for the lowland areas of Western Washington.
Strong cold front associated with a deeper low moving inland will move through the waters Wednesday. Gale force winds developing ahead of the front over the coastal waters and west entrance to the Strait of Juan de Fuca tonight. Gales developing at the east entrance to the Strait as well as the Northern Inland Waters and Admiralty Inlet Wednesday. A Small Craft Advisory for Puget Sound will be in effect from 18z tomorrow to 03z on Thursday. Front east of the waters by late Wednesday. Weaker systems moving through the area Thursday through Saturday.
West swell increasing with the front peaking between 14 to 16 feet Wednesday night and remaining elevated into Friday. Period between 14 to 15 seconds. Conditions may be suitable for the season's first High Surf Advisory for 15 foot seas along the coast. Certain entities along the coast should be aware of the possibility for erosion due to high surf. Though moderately confident in this event, stay tuned to the forecast for the definitive headline.
Several inches of rain are expected of rain are expected for the southern slopes of the Olympics and portions of the Cascades late tonight and Wednesday. Given that rivers are starting off very low, widespread river flooding is not expected. However, these rainfall amounts are sufficient to likely lead to sharp rises on many rivers and streams that flow out of these areas, including the Skokomish. Localized river flooding remains possible. While rivers should begin to drop on Thursday, another round of steady rain is possible Friday and Saturday, which may lead to additional rises on many rivers. Cullen
.SEW WATCHES/WARNINGS/ADVISORIES... WA...Wind Advisory from midnight tonight to 5pm PDT Wednesday for Central Coast-North Coast.
PZ...Gale Warning from midnight tonight to 6pm PDT Wednesday 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.
Gale Warning from 6am to 6pm PDT Wednesday for Admiralty Inlet- East Entrance U.S. Waters Strait Of Juan De Fuca-Northern Inland Waters Including The San Juan Islands.
Gale Warning from midnight tonight to 2pm PDT Wednesday for West Entrance U.S. Waters Strait Of Juan De Fuca.
Small Craft Advisory from 2am to 6pm PDT Wednesday for Central U.S. Waters Strait Of Juan De Fuca.