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[October 22, 2010] (AP) Wet weather was forecast to persist in the Southwest, while a cold front triggered snow and rain in the Northeast and Great Lakes.

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A trough of low pressure dipping into the northeastern U.S. from eastern Canada would allow for cool air to pour in from the north. This would likely trigger scattered rain showers turning to snow over the extreme northern regions. This sloppy combination of frozen rain and snow was expected to cause dangerous travel conditions, especially at higher elevations. Total snowfall accumulation was forecast to be light but would hamper the morning commute. Highs were expected to be in the upper 30s to lower 40s, while overnight lows would dip into the 20s.

In the South, another mild day was expected as high pressure dominated the region. This would bring another hot and dry day with weaker winds. Weaker winds were expected to allow for more manageable fire spread, but the dry and warm surface conditions would still produce a fire threat. Highs were expected to be in the 80s across most of the Southeast.

In the West, a low pressure system over the Southwest was forecast to push eastward and over the central and southern Rockies and into the Plains. This system has a history of producing strong winds and periods of heavy rain and thunderstorms. Thus, these storms were expected to persist throughout Friday. The northern side of this system was forecast to kick up 1 to 3 inches of snow over Colorado and Utah as it pulled cool air in from the north.

Farther West, another low pressure system in the Pacific Ocean was forecast to push a front onshore, which would produce scattered showers over the Pacific Northwest and northern California. This was expected to also bring more cool temperatures to the West Coast with highs in the 50s and 60s.

Temperatures in the Lower 48 states Thursday ranged from a low of 16 degrees at Daniel, Wyo., to a high of 92 degrees at Laredo, Texas.

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[Associated Press article from Weather Underground]