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Weather across the nation: 8/4/12

4:46 PM, Aug 4, 2012   |    comments
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Showers and thunderstorms continued to move through the Great Lakes and Midwest today as a low pressure system to the north pushed a strong cold front eastward through the region.

This system produced more heavy rainfall, strong winds, and hail as it extended through Wisconsin, over Iowa, and into Illinois. Wind gusts up to 75 mph were reported in Cedar Rapids, Iowa. Heaviest rainfall was also reported in Cedar Rapids, Iowa with a midday total of 2.08 inches of rain.

In addition to strong winds, this system has a history of large hail and a even tornado development. Thus, severe thunderstorms were anticipated as this system quickly approached the Chicago Metropolitan Area. South of this activity, a wave of low pressure moved through the Eastern Valleys and maintained warm and moist conditions.

This allowed for widespread showers and thunderstorms to pop up across Tennessee and Ohio Valleys. Further south, an area of low pressure just east of Florida continued to spin over the Bahamas. This kicked up more showers and thunderstorms that reached move into Florida and approached the coasts of Georgia and South Carolina.

This system remained at a low, 10% chance of tropical cyclone development. In the West, monsoonal moisture advanced northward from the Desert Southwest. This produced showers and thunderstorms from New Mexico and Arizona, into southern and central California. Severe thunderstorm development was not anticipated in these areas.

To the north, high pressure continued to build over the Pacific Northwest. This kept the region sunny and hot, with highs in the 80s for the coasts and 90s inland.

SATURDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................109 Stillwater, Okla.

HIGHEST HEAT INDEX (DEGREES F)..........................116 Okmulgee, Okla.

LOWEST TEMPERATURE (DEGREES F)..........................28 West Yellowstone, Mont.

LOWEST WIND CHILL (DEGREES F)...........................26 Yellowstone, Wyo.

HIGHEST WIND GUST (MPH).................................72 Cedar Rapids, Iowa.

HIGHEST PRECIPITATION (INCHES)..........................2.08 Cedar Rapids, Iowa.

ON THIS DATE: -The United States was treated to a magnificent aurora borealis on this date in 1882. The aurora was visible from Oregon to Maine, and down to Florida. Citizens in Louisville, Ky. reported seeing "merry dancers" throughout the sky, while Saint Vincent, Minn., observed its most brilliant aurora ever.

The Associated Press

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