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[May 10, 2011] (AP) A strong low pressure system was forecast to continue moving eastward over the Great Lakes on Tuesday, pulling a cold front across the eastern U.S. The front was to start the day over the Mississippi River Valley and move into the East Coast by evening.

(Click on map for larger image.)

Insurance This strong cold front was predicted to significantly drop temperatures as it passes. Expect temperatures near 10 degrees above seasonal ahead of the front and 10 degrees below seasonal behind the front. These opposing air masses were expected to create moderate to heavy precipitation along the front.

Due to additional energy from the Gulf of Mexico, the Southeast and Gulf states were to see some severe thunderstorms. This system has a history of producing strong winds and tornadoes, in addition to nearly 2 inches of rain.

In the North, this front was forecast to continue kicking up scattered snow showers. Expect another 1 to 3 inches of snow across the upper Midwest and upper Mississippi River Valley.

Highs across the Ohio River Valley and lower Great Lakes were to remain above freezing; thus, most areas will see rain showers. Expect some breezy conditions with gusts up to 30-35 mph.

In the West, another trough of low pressure and associated cold front dip into the Pacific Northwest from the Gulf of Alaska. This was predicted to bring scattered rain with high-elevation snow to Washington and Oregon, as well as the extreme northern part of California.

High pressure over Southern California will allow for dry and cool conditions to persist over most of the state.

Temperatures in the Lower 48 states Monday ranged from a low of minus 14 degrees at Stanley, Idaho, to a high of 93 degrees at McAllen, Texas.

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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]