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December 24, 2010 / Dave Gorham

StormWatch Today: Friday, 12/24

ImpactWeather's Gmaps with current radar and risk areas plus StormWatch forecast (12/25 12:00 CST).

ImpactWeather’s StormWatch team continues to monitor three areas for significant weather.

Risk: Winter Storm. A low pressure area is forecast to move into the Atlantic Ocean and strengthen over the weekend as it moves northward. There is some uncertainty with the eventual track of the low, but there appears to be an increasing threat for heavy snow and gusty winds to coastal portions of the northeastern United States and the Canadian Maritimes on Sunday and Monday. Snowfall amounts could range from 4-8 inches, isolated 12 inches. In addition, gusty winds of 20-30 mph, gusts 45 mph, could create areas of blowing and drifting snow.

Risk: Winter Storm. Light to moderate snow will spread southeastward across southern Minnesota, Iowa, Missouri and Illinois on Friday as low pressure passes by to the south. Accumulations are forecast to range from 2-4 inches for most areas, with 3-6 inches possible across northern Iowa.

Risk: Excessive Rain/Heavy Snow. A Pacific low pressure area pushing into the western North American coast will bring periods of rain to northwest Washington and southwest British Columbia through tomorrow. Rainfall amounts of 1-3 inches will be common, with higher totals possible over Vancouver Island. Moderate to heavy snowfall will be possible across the elevated regions of the Pacific mountains.

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