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Relentless heat wave expanding

Updated: July 18, 2011, 3:00 p.m. EDT


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Unhealthy levels of heat and humidity are encompassing much of central U.S. from the Southern Plains through the upper Midwest and this sultry heat will move east this week into the mid-Atlantic and Southeast, according to NOAA's National Weather Service.

Temperatures in the 90s to near 100 degrees will feel as hot as 115 degrees or higher when factoring in the high humidity. Record high temperatures are likely to be set in some locations — adding to the more than 1000 records that have been set or tied so far this month.

“This heat is dangerous on many levels,” said Jack Hayes, director of the National Weather Service. “Temperatures and humidity levels are high, the heat will be prolonged, and very warm temperatures overnight won’t provide any respite. All of these factors make this an unhealthy situation, especially those in the upper Midwest who are not accustom to such heat.”

 

Heat Wave Sweeps Across the U.S.

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A shroud of high pressure has taken a foot-hold over the U.S. from the Plains to the Northeast, and with it has brought temperatures well into the 90's and 100's for half of the country. This animation shows the predicted daily high temperatures from NOAA's high resolution North American Model (NAM) from July 13-21, 2011.

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