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[April 30, 2011] (AP) A low pressure system was bringing more rain to the northern Plains and upper Midwest on Saturday, while the East Coast remained dry and sunny.

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A low that moved from the Pacific Northwest and over the northern Rockies was expected to persist on its eastward track, moving into the upper Midwest and Great Lakes. Flow around this system was forecast to pull moisture in from the Gulf of Mexico, which would create favorable conditions for thunderstorm activity.

Strong winds with gusts up to 40 mph were likely, in addition to large hail. Most areas were forecast to see between half an inch and an inch of rain, while areas of thunderstorm activity will see up to 2 inches of rain.

At the same time, a cold front was forecast to develop south of this system, stretching from the upper Midwest and into the southern Plains. Thunderstorm activity was also likely along the front, due to the warm and humid conditions ahead of the cold front.

Behind this system, a cold pool of air lingering over the Rockies was expected to produce more late-season snow showers over Wyoming, Montana, Colorado and Utah.

In the East, another sunny, warm and dry day was forecast as a large ridge of high pressure dominates the East Coast. This system will sit east of the Mississippi, bringing pleasant spring weather to the eastern third of the nation.

Temperatures in the Lower 48 states Friday ranged from a morning low of 7 degrees at Stanley, Idaho, to a high of 97 degrees at Fort Stockton, Texas.

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http://iwin.nws.noaa.gov/

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[Associated Press article from Weather Underground]