Weather across the nation: 1/11/13

5:11 PM, Jan 11, 2013   |    comments
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Snow moves from the Rockies and into the Plains on Friday, while heavy rain persists along a cold front that moves over the Eastern Valleys.

A broad area of low pressure over the Rockies will continue moving eastward and pulls a cold front eastward with it. This will produce more heavy snowfall across the Northern and Central Rockies, which will move into the Dakotas and Upper Midwest. Snowfall accumulation through Friday night will reach up to 12 inches for parts of Montana, 1 to 2 feet for most of Utah, and 6 to 8 inches in northwestern Colorado.

Warmer temperatures ahead of the frontal boundary will allow for a messy combination of freezing rain and sleet for the Upper Midwest. Freezing rain advisories have been issued for most of Minnesota and Wisconsin as ice accumulation from 0.1 to 0.3 inches is possible. The Dakotas will see new snow and sleet accumulation from 2 to 5 inches. High wind advisories will remain in effect along the leading edge of this storm as it moves over the High Plains and into the center of the nation. Expect winds from 30 to 40 mph, with gusts up to 55 mph.

Meanwhile in the East, a strong storm will quickly move northeastward over the Mississippi River Valley and into the Ohio River Valley. This will pull a strong cold front northward with it, which will continue creating heavy rainfall and strong winds. As this system pulls away from the Gulf of Mexico, severe weather will diminish. Thus, there is a slight chance of severe weather across the Ohio River Valley.

Expect heavy rains to spread into the Ohio Valley and Great Lakes, with lighter and more widespread showers stretching southward into the Gulf coast. Heavy precipitation associated with this system is expected to reach into the Northeast late Friday night. Rainfall totals in associated with this storm will range from 1 to 2 inches in most areas.

THURSDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................85 Fort Myers, Fla.

HIGHEST HEAT INDEX (DEGREES F)..........................85 Tampa Macdill AFB, Fla.

LOWEST TEMPERATURE (DEGREES F)..........................-18 Alamosa, Colo.

LOWEST WIND CHILL (DEGREES F)...........................-52 Point Lay, Alaska

HIGHEST WIND GUST (MPH).................................101 Mt. Washington, N.H.

HIGHEST PRECIPITATION (INCHES)..........................4.17 Alexandria Esle, La.

ON THIS DATE....... The most rapid temperature change in the history of the United States occurred on this date in 1980. That is when the temperature at Great Falls, MT rose 49 degrees (from -32 to 17 degrees) in just seven minutes due to a warm Chinook wind.

The Associated Press

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