The nation's weather

AP News
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Posted: Oct 02, 2011 5:28 AM
The nation's weather

Heavy rains will cover the East while scattered showers will spread into the Pacific Northwest on Sunday. A low pressure system over the Great Lakes will stretch out and shift southward into the Mid-Atlantic states.

Flow around this system will pull moisture in from the Atlantic, giving the system strength. This will allow scattered showers and thunderstorms to develop from the Mid-Atlantic through the New England states. Rainfall totals will vary from around an inch to up to 2 inches possible in some areas.

Along the back side of the system, strong flow from the North will pull in cool Canadian air across the Eastern U.S. Daytime highs in the 50s and 60s are expected for the Ohio River Valley and Eastern Valleys. Frost advisories have been issued as overnight lows will dip into the 30s and 40s across these areas.

Further west, a strong high pressure ridge is building over the Plains, allowing for sunny skies and warm temperatures. Unseasonably high temperatures will range in the 70s and 80s across the Northern Plains.

Out West, clouds with scattered showers are expected as a trough of low pressure offshore pushes a cold front over the Pacific Northwest and northern California. Expect less than a half of an inch of rain in most areas, with more rain anticipated at higher elevations. Temperatures in the lower 48 states ranged Saturday from a morning low of 21 degrees at Hibbing, Minn., to a high of 100 degrees at Phoenix, Ariz.

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Online:

Weather Underground: http://www.wunderground.com

National Weather Service: http://iwin.nws.noaa.gov

Intellicast: http://www.intellicast.com