No FastCast tonight...continue reading the full blog below!
It has been the tale of this winter...marginal snow event after marginal snow event. Another one is ahead for late Monday night through early Tuesday. Snow will largely depend on the temperature, elevation, and the precipitation rate (heavier precipitation = more snow coming to the surface).
Snow will be most likely early Tuesday morning, approximately from 6-10 AM. Showers late Monday night and on Tuesday night/Wednesday morning could also bring light snow, which is why we will show forecasts below through Wednesday morning.
Let's start with the European model forecast 10 AM Wednesday.
The European model shows a dusting to 1” of snow from Seattle south to Portland. The Kitsap Peninsula, Hood Canal, areas Seattle northward, and around Portland could get 1-4”, most possible near Portland, in the foothills north of I-90, and in Whatcom County. In Eastern Washington, expect up to 4”, most outside the Lower Columbia Basin.
Next, the NAM high-resolution forecast, also through 10 AM Wednesday.
This forecast shows scattered snow, with accumulations of 0.25-3” scattered from Longview northward, most from Seattle to Skagit County. This also shows up to 8” for Eastern Washington, most from the Tri-Cities to Spokane.
Next, the HRRR high-resolution forecast through 10 AM Wednesday.
This forecast shows 1-4” of snow from Olympia southward, including on the coast. This also shows 1-3” from Everett northward, 2-6” around Spokane, and 1-4” on the coast from Hoquiam northward and from Astoria south. This forecast is an outlier.
Finally, the UW WRF ultra-high resolution forecast through 10 AM Wednesday.
This shows 0.5-1.5” from Olympia to Seattle and 2-4” from Seattle northward. This also shows an unlikely 8-16” near the NW tip of WA near Forks, Neah Bay, and Western Clallam County. This forecast is likely an outlier, especially for the NW WA Coast.
Putting this all together in one forecast:
Portland: 1-4”
Portland to Olympia: 0-2”
Olympia to Seattle: 0-1.5”
Seattle to Canadian Border: 1-4” (less near water)
Hood Canal Area/Kitsap Peninsula: 1-4”
Coast from Hoquiam northward: 0-4” (less near the ocean)
It is likely that highs in the low to mid 40s and lows in the low 30s are going to continue for awhile, with more marginal snow chances ahead. Stay tuned!
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