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Weather across the nation: 11/25/12

5:26 PM, Nov 25, 2012   |    comments
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Chilly and areas of unsettled weather developed in parts of the central and eastern thirds of the nation on Sunday as an upper trough of low pressure moved eastward into the Eastern U.S.

An associated low pressure system pushed across the Upper Great Lakes and southern Ontario, Canada, while an associated cold front reached southward from Michigan through the Southern Plains by Sunday afternoon.

This system ushered a cold airmass in from Canada and allowed for mainly snow showers and some lake-effect snow showers in the Upper Great Lakes and parts of lower New England.

As this system pushed off to the east, blustery northwesterly flow surged into the Northern Rockies and Northern Plains, allowing many areas to experience daytime highs that were well below the freezing mark.

Cold temperatures and areas of energy pushing through these regions translated into continued snow showers through the afternoon, especially in the higher elevations of Wyoming and Montana.

Periods of moderate to heavy snow and gusty winds in the western portions of Wyoming and Montana were expected to create snow accumulation of 2 to 5 inches, and dangerous travel conditions with slippery and snow packed roads and reduced visibility due to periods of blowing snow.

SUNDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................82 San Nicolas Island, Calif.

HIGHEST HEAT INDEX (DEGREES F)..........................82 Port Isabel, Texas

LOWEST TEMPERATURE (DEGREES F)..........................5 Alamosa, Colo.

LOWEST WIND CHILL (DEGREES F)...........................-38 Mt. Washington, N.H.

HIGHEST WIND GUST (MPH).................................98 Mt. Washington, N.H.

HIGHEST PRECIPITATION (INCHES)..........................0.38 Sheridan, Wyo.

ON THIS DATE....... Weatherwise, it was not a very happy Thanksgiving in Colorado in 1983. The "Great Thanksgiving Weekend Blizzard" dropped almost two feet of snow in a timeframe of 37 hours, causing Stapleton Airport to close for a day. Many Interstate highways around Denver were closed and visibility at Limon, Colo., dropped to zero.

The Associated Press

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