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Updated: 10:00 PM GMT on November 20, 2009

Weather Summary

Weather Underground Forecast for Friday, November 20, 2009.

New England will see another dreary day, while the Pacific Northwest remains under wintry conditions on Friday.

A low pressure system will continue moving over British Colombia from the Pacific Ocean. As this system pushes further inland throughout the day, it will create a moist cold front that will sweep through the Pacific Northwest and northern California. This front will have obtained ample moisture from the Pacific Ocean, and spread heavy precipitation over the region. In the high elevations of the Cascades expect snowfall accumulation between 8-12 inches. The Northern Rockies will see increasingly snow conditions with up to 6 inches. This strong system will also bring intense winds to the region with gusts up to 35 mph anticipated. Due to these conditions winter weather and avalanche advisories have been issued. Northern California will also see periods of significant rainfall on Friday with most areas seeing 1-1.5 inches of rain.

Meanwhile, in the Central US, high pressure will build over the Mississippi River Valley and bring another day of pleasant weather to most of the Plains and Valley regions. However, a residual low pressure system in the Northeast will continue spreading light and scattered showers. Expect light rain with no more than a half of an inch to stretch from New York to Maine.

To the South, an interesting trough has developed and is expected to pick up moisture from the Gulf of Mexico that will feed energy into the system. Expect heavy rain and strong winds over the Gulf states with rainfall totals between 1.5-2 inches and gusts up to 20 mph.

Temperatures in the Lower 48 states Thursday ranged from a low of -2 degrees at Laramie, Wyo. to a high of 86 degrees at Indio, Calif.