US

Weather Underground Forecast for Wednesday, March 10, 2010.

Expect another snowy day over the Central US on Wednesday as two low pressure systems combine over the Plains. A system that brought snow and rain to the Northern and Central High Plains will slowly move toward the Great Lakes. At the same time, another low pressure system will move from the Central Rockies and into the Southern Plains. Thus, a large area of low pressure will develop over the Plains and flow around this system will create two interesting frontal boundaries. A stationary front will extend from the Mid-Mississippi River Valley and up the Ohio River Valley, into New England. Warm air moving in from the south will allow for light rain to develop along this front, with rainfall totals between a tenth and a quarter of an inch. Mild thunderstorms may develop along this front, which would allow for up to an inch of rain.

To the south, a cold front will track from the Southern Plains and over the Lower Mississippi River Valley, into the Southeast. Due to ample moisture from the Gulf of Mexico feeding strength into this system, scattered showers and thunderstorms will develop over the Gulf states. Expect less than half of an inch of rain in most areas, with up to an inch in areas of thunderstorm development. Highs will reach into the 70s over the Southeast on Wednesday.

The Northern and Central Plains will continue seeing highs near freezing, thus, snow will develop as the low hovers over the region. Expect the Dakotas to see between 2-4 inches of new snow, while Nebraska may see 1-2 inches.

In the West, a low pressure system spinning in the Pacific Ocean will push more moisture over the West Coast. The front will slightly weaken as it moves onshore, but will kick up light showers with snow at higher elevations of the Sierras and Cascades. Expect light low-level rain showers with 2-5 inches of snow over higher elevations of Oregon, Washington, and northern California.

Temperatures in the Lower 48 states Tuesday ranged from a low of 5 degrees at Mt. Washington, N.H. to a high of 87 degrees at Kingsville NAS, Texas.