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Weather across the nation: 12/7/12

7:34 PM, Dec 7, 2012   |    comments
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Snow and rain developed in the Plains as well as the Northeast and Ohio River Valley on Friday.

A trough of low pressure continued to advance eastward over the Great Lakes and into eastern Canada. This continued to pull a cold front eastward, which triggered rain showers across the Great Lakes and Ohio River Valley. The leading edge of this system reached into the Northeast by midday.

Temperatures varied around freezing along the northern side of this system, allowing for rain showers to turn to freezing rain and snow showers near the Great Lakes and the far Northeast. Heaviest rainfall associated with this system was reported in Louisville, Ky., with a midday total of 1.51 inches of rain. Strong winds were reported at higher elevations of the Northern Appalachians, with a high gust of 55 mph at Mt. Washington, N.H.

Behind this system, a weak trough of low pressure strengthened as it moved off the Rockies and into the Plains. This brought scattered snow showers to the Dakotas and into Minnesota, with rain showers developing over Nebraska and Kansas. Snowfall accumulations varied from 2 to 4 inches in these areas, and Winter Weather Advisories were issued for Minnesota, South Dakota, and Iowa.

Farther west, another cold front moved onshore from the Pacific Ocean, and created another round of rain with mountain snow showers for most of Washington and northern Oregon. Snow levels dropped to 2,000 feet, with accumulation from 10 to 18 inches anticipated at highest mountain peaks through Friday night.

Temperatures in the Lower 48 states have ranged from a morning low of 1 degrees at Cando, N.D. to a midday high of degrees at Corpus Christi, Texas.

WEATHER EXTREMES

HIGHEST TEMPERATURE (DEGREES F).........................86 Corpus Christi, Texas

HIGHEST HEAT INDEX (DEGREES F)..........................87 Corpus Christi, Texas

LOWEST TEMPERATURE (DEGREES F)..........................1 Cando, N.D.
LOWEST WIND CHILL (DEGREES F)...........................-48 Gulkana, Alaska

HIGHEST WIND GUST (MPH).................................55 Mt. Washington, N.H.

HIGHEST PRECIPITATION (INCHES)..........................1.51 Louisville, Ky.

The Associated Press

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