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Heavy Snow Forecast For Cascades

Posted: 3:12 pm PST November 22, 2006Updated: 3:26 pm PST November 22, 2006

Mountain snow is expected to be especially heavy on Thanksgiving Day, with winds making conditions even worse drivers in the passes.

Forecasters said heavy snow is possible in the Washington Cascades on Thanksgiving Day and Friday.

"Be ready for mountain snow in the Cascades at any time, but especially heavy Thanksgiving afternoon and through midday Friday," said KIRO 7 Eyewitness News Chief Meteorologist Andy Wappler.

Video: Smooth Traveling At Sea-Tac

As a cold front moves through, the snow level will drop as low as 1,500 feet. Winds will make conditions worse for drivers in the passes.

Forecasters said 2 to 4 inches of new snow is expected Wednesday night with 3 to 5 inches Thursday.

The Washington Transportation Department is bringing in extra crews to keep Interstate 90 open through the weekend, a DOT representative said.

Normally, about 30,000 vehicles a day cross the Cascades on I-90 but on Sunday, the flow will approach the record of 58,000, officials said.

The DOT said the peak times on Sunday will be between 11 a.m. and 7 or 8 p.m. Drivers can avoid the congestion by traveling in an off-peak period. Graphs showing peak times are available at www.wsdot.wa.gov/thanksgiving.

5-Day Forecast

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Detailed Forecast

National Weather Service

Tonight: increasing clouds, becoming cloudy overnight. Lows in the upper 40s to mid 50s. Southwest wind 10 to 20 mph.
Monday: cloudy with a chance of showers. Highs in the 60s. South wind 10 to 20 mph.
Monday Night Through Tuesday Night: partly to mostly cloudy with a chance of showers. Lows in the upper 40s and 50s. Highs in the 60s. Southwest wind 10 to 15 mph.
Wednesday: partly cloudy. A chance of showers. Highs in the mid 60s to low 70s.
Wednesday Night Through Sunday: mostly cloudy with a chance of showers. Lows in the lower 50s. Highs in the lower 70s.

3 - Day Forecast
Sat
Clear
87
Sun
Mostly Clear
83
Mon
Cloudy
70
Seattle Metropolitan Area
Tonight: increasing clouds, becoming cloudy overnight. Lows in the upper 40s to mid 50s. Southwest wind 10 to 20 mph.
Monday: cloudy with a chance of showers. Highs in the 60s. South wind 10 to 20 mph.
Monday Night Through Tuesday Night: partly to mostly cloudy with a chance of showers. Lows in the upper 40s and 50s. Highs in the 60s. Southwest wind 10 to 15 mph.
Wednesday: partly cloudy. A chance of showers. Highs in the mid 60s to low 70s.
Wednesday Night Through Sunday: mostly cloudy with a chance of showers. Lows in the lower 50s. Highs in the lower 70s.