Weather across the nation: 9/21/12

5:02 PM, Sep 21, 2012   |    comments
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Showers and thunderstorms developed across the Midwest and Great Lakes on Friday as a low pressure system over eastern Canada continued to push a cold front over the region.

This system produced widespread scattered showers and thunderstorms from the Upper Midwest through the Great Lakes and into the Ohio River Valley. Heavier rain showers developed along downwind shores of the Great Lakes as flow over the lakes picked up additional moisture.

Rainfall totals ranged around a half of an inch across the region, with 0.67 inches reported in Houghton, Mich. Meanwhile, the back side of this system pulled cooler air in from the north and kept the Upper Midwest cool. The region saw unseasonably cool temperatures with overnight lows dipping into the upper 20s, and daytime highs remaining in the upper 50s to lower 60s.

To the south, the tail end of a cold front slowly moved away from Florida, but kicked up more thunderstorm activity throughout the day. The system obtained moisture from the eastern Gulf of Mexico and produced periods of heavy rains and strong thunderstorms. Severe storms have not been reported but the heaviest rainfall was reported in Okeechobee, Fla., with a midday total of 2.24 inches of rain.

Elsewhere, high pressure dominated the West and allowed for sunny and dry conditions to continue. This maintained dangerous fire conditions and poor air quality across the Western states. Just offshore, a trough of low pressure approached the Pacific Northwest, which brought cooler and cloudy conditions to the region.

FRIDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................106 Thermal, Calif.

HIGHEST HEAT INDEX (DEGREES F)..........................106 Tampa Macdill AFB, Fla.

LOWEST TEMPERATURE (DEGREES F)..........................25 Stanley, Idaho

LOWEST WIND CHILL (DEGREES F)...........................20 Tin City, Alaska

HIGHEST WIND GUST (MPH).................................54 Flag Island, Minn.

HIGHEST PRECIPITATION (INCHES)..........................2.24 Okeechobee, Fla.

ON THIS DATE....... Never doubt the courage and resolve of chickens. A tornado on this date in 1894 picked up a large chicken house and wedged it between two trees. The next day, the hens were found sitting on their eggs as if nothing had happened.

The Associated Press

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