The nation's weather

AP News
Posted: Apr 23, 2011 5:36 AM
The nation's weather

A strong low pressure system was to make its way into the Northeast on Saturday, triggering heavy rain and thunderstorms throughout the day.

While moving over the Great Lakes and into the Northeast, flow around the system was expected to pull additional moisture in from the Atlantic Ocean. Also, the system was to drag a cold front behind it, stretching from the Northeast, down the Ohio River Valley, and into the Mid-Mississippi River Valley.

Scattered showers and thunderstorms were expected to develop along this front, with a slight chance of severe storm development over the Eastern Valleys due to prevailing warm and humid conditions. Rainfall totals were to range from a half to an inch of rain, while areas of thunderstorm development were to possibly see up to 2 inches. This system has a history of producing damaging winds, large hail, and periods of intense downpours.

Meanwhile, to the west, a ridge of high pressure was to build over the Northern and Central Plains, allowing for a break in active weather. Clearing skies and warming temperatures across the North-Central US were expected.

Further west, another trough of low pressure was to move onshore, pulling some moisture onshore with it. This was expected to bring widespread scattered showers to northern California that were to move into the Pacific Northwest throughout the day.

Temperatures in the Lower 48 states Friday ranged from a morning low of 1 degrees at Stanley, Idaho to a high of 96 degrees at Laredo, Texas.