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[January 18, 2011] (AP) Active winter weather will persist across the U.S. on Tuesday, as multiple weather features move through the nation.

(Click on map for larger image.)

A low pressure system that brought heavy rains and severe thunderstorms to Florida will make a northward turn, skirting up the East Coast. This system will drag a front up the coast with it, spreading periods of heavy rain and snow once temperatures drop below freezing in New England. The Mid-Atlantic states will see mainly rain showers as highs remain in the upper 40s.

At the same time, a low pressure system and associated cold front will sweep over the Midwest, move over the Ohio River Valley and into the Northeast. This system has a history of producing 3 to 4 inches of new snow and may produce periods of heavy lake-effect snowfall along the downwind shores of the Great Lakes. Light snowfall may even reach into the southern Appalachian Mountains.

In the West, a low pressure system will dip in from British Colombia and move over the northern and central Rockies. This system will push a cold front southward, which will extend westward from the Rockies to the Pacific Northwest. This will bring more light rain and high-elevation snow to Oregon and Washington, while up to 4 inches of new snowfall is expected across Montana, and Utah will see 1 to 2 inches of new snow on Tuesday afternoon and evening.

Temperatures in the Lower 48 states Monday ranged from a morning low of minus 27 degrees at Saranac Lake, N.Y., to a high of 89 degrees at San Fernando, Calif.

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Online:

Weather Underground: http://www.wunderground.com/

National Weather Service:
http://iwin.nws.noaa.gov/

Intellicast:
http://www.intellicast.com/

[Associated Press article from Weather Underground]