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By WEATHER UNDERGROUND
The Associated Press
Thursday, March 24, 2011; 4:38 AM

-- The strong storm that brought severe weather activity to the Eastern Valleys Wednesday will continue to produce active weather as it moves through the Mid-Atlantic and offshore Thursday.

Light snow, rain showers and thunderstorms will persist from the Northeast through the Mid-Atlantic as the system travels toward the Mid-Atlantic coast during the morning. The fast-paced nature of this system will hinder severe thunderstorm development throughout the region. As this system moves offshore, cold high pressure from the north will fill in behind it. This colder airmass will lead to a cooling trend from areas of the Upper and Mid-Mississippi Valley through the New England and the Mid-Atlantic for the rest of the week.

Meanwhile, in the West, another Pacific storm will hit the California coast with more wet weather activity as the storm reaches the Rockies. Moist, onshore flow will accompany this system and stream across the coastal areas into the Sierra Nevadas. This will translate into an additional 1 to 3 inches of rain and an additional 2 to 4 feet of mountain snow in the already saturated areas of California. Snow levels will remain pretty low for early Spring. Snow levels of around 2,000 feet are expected for the west slopes of the Sierra Nevadas, while snow levels in the Shasta County mountains are expected to lower to 1,500 feet. Risks of runoff are expected to continue, leading to possible flooding of roads and low lying areas as well as some rises in creeks, streams and rivers in the central and northern valleys.

Temperatures in the Lower 48 states Wednesday ranged from a morning low of -2 degrees at Mt. Washington, N.H., to a high of 90 degrees at Edinburg, Texas.

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