The nations weather

AP News
Posted: Sep 18, 2011 5:58 AM
The nations weather

Another cool day awaits the Northeast while more storms rumble across the Plains states on Sunday. A high pressure ridge over the Great Lakes is trekking eastward and is expected spread over the Northeast. Air flowing around this ridge will continue pushing cold Canadian air into the region, keeping temperatures about 10 degrees below seasonable. Overnight low temperatures will dip into 20s again in the extreme Northeast as frost and freeze advisories remain in effect from upstate New York to Maine. Daytime highs will remain chilly with highs only reaching into the 50s and 60s.

A frontal boundary lingering off the coast of the mid-Atlantic states will allow for some scattered rain showers along the Southeastern seaboard. Rainfall totals will be light as this system slowly pulls away and heads over the Atlantic Ocean.

In the Plains, a low pressure system moving through Canada will create a strong trough that will extend into the Southern Plains. Expect this system to trigger widespread scattered showers and thunderstorms from the Dakotas and Upper Midwest to Texas. Moisture from the Gulf of Mexico will feed energy into this system, and severe storms may pop up across Oklahoma and northern Texas.

In the West, a ridge of high pressure brings another warm and sunny day to most of California as it pushes moisture offshore. However, a trough lingers over the Pacific Northwest, triggering more light rain showers throughout the day. Temperatures in the Lower 48 states ranged Saturday from a morning low of 24 degrees at Stanley, Idaho to a high of 97 degrees at Edinburg, Texas.



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