Snow, ice, cold air - flavors of the forecast as head into week | Weather

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Snow, ice, cold air - flavors of the forecast as head into week
Snow, ice, cold air - flavors of the forecast as head into week

Spotty snow showers continue throughout the overnight and right through the day on Sunday.  

Some models are suggesting that 4 to 8" of snow is possible in the south Cascade foothills through mid-day tomorrow, this would include the region from North Bend to Enumclaw.  At that point, it looks like we may get a good batch of snow right over the urban core by the afternoon.  

If that materializes, 1 to 3" of snow may pile up between Everett and Tacoma later Sunday.  Highs will top out only in the middle 30s, so the snow that falls should stick around.

Monday will feature more of the same for Martin Luther King, Jr. Day.  With lows in the 20s and highs in the 30s, any precipitation that falls will still be in the form of snow.  Biting north winds will make it feel even colder, and another 1 to 3" of new snow could accumulate in the foothills.

It's not until TUESDAY that a widespread snow event is looking possible for Western Washington. All of the snow up until this point is looking very hit-and-miss (some areas receiving plenty, while other won't see a single flake).  Snow should start to pile up by mid-morning as a frontal system noses in over our cold air.  Highs will stay in the 30s, and if the forecast comes together as the models are suggesting, most of Western Washington will see accumulating snow on Tuesday.

By Wednesday and Thursday, much warmer air spills into the region, and the precipitation turns to rain.  In fact, the rain may be heavy through Southwestern Washington, leading to concerns about rising rivers and flooding.    It will also be quite windy late in the week.  Highs will climb back into the 40s beginning on Wednesday and continuing through Friday, with rain at times beneath mainly cloudy skies.

It may cool off again enough next weekend for another threat of snow by Saturday.  What a seesaw!

Stay tuned, and drive carefully,

Meteorologist Shannon O'Donnell
The KOMO4 Forecast Team