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Weather across the nation: 10/21/12

5:30 PM, Oct 21, 2012   |    comments
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Cool and showery weather continued in the Pacific Northwest on Sunday as a large cold trough of low pressure in the jet stream centered over the central British Columbia coast moved slowly to the south.

The system pushed ample moisture from the Pacific inland and maintained unsettled weather across the region with scattered showers, high elevation snow, and claps and rumbles of thunder through the afternoon.

Rainfall totals in the Pacific Northwest have ranged up to an inch in some locations during the early afternoon and snow accumulations of about 1 to 2 inches have been reported mainly on grass surfaces at pass level. The highest snow accumulation was reported at Timberline Lodge on Oregon's Mt. Hood at 6,000 feet.

Meanwhile in the East, precipitation in much of the Northeast tapered off as a low pressure system pulled farther northeastward into eastern Canada on Tuesday.

A few areas of lake enhanced precipitation developed downwind of the Great Lakes as this departed. Calmer and dry conditions occurred across the rest of the East as high pressure began to build in from the South. This transition resulted in a modest warming trend in parts of the Southern Plains and Eastern Valleys.

SUNDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................95 Edinburg, Texas

HIGHEST HEAT INDEX (DEGREES F)..........................97 Kingsville NAS, Texas

LOWEST TEMPERATURE (DEGREES F)..........................12 Lakeview AWS, Ore.

LOWEST WIND CHILL (DEGREES F)...........................-17 Anaktuvuk Pass, Alaska

HIGHEST WIND GUST (MPH).................................75 Mt. Washington, N.H.

HIGHEST PRECIPITATION (INCHES)..........................0.41 North Bend, Ore.

ON THIS DATE....... Benjamin Franklin deduced that wind rotates counterclockwise around a storm system on this date in 1743 after clouds blocked his view of a lunar eclipse in Philadelphia. After learning that his brother in Boston was able to view the eclipse, he theorized that the storm system seemed to move southwest to northeast, even though the winds at his location were from the northeast.

The Associated Press

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