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Summer's first serious heat wave!

Summer's first serious heat wave!

by Ben Pine

WHAS11.com

Posted on August 20, 2014 at 11:50 AM

Updated Wednesday, Aug 20 at 11:56 AM

They say, it's not the heat, it's the humidity.  Well, we high levels of both this weekend.  The culprit?  The jet stream is flowing north over to the Great Lakes and a large upper-level ridge (hump in the jet) is forming over the Ohio Valley, Midwest, and South.  Cooler conditions will be found over the northwestern US. 

Check out the Excessive Heat Warnings and Heat Advisories already posted just to our west on the 2nd map below. 

The next three graphics show the GFS weather model's forecast highs temps for Saturday, Sunday, and Monday.  Expect highs in the mid-upper 90s Friday through next Tuesday - with the heat index at or above 100.  

The record high Saturday and Sunday is 99 degrees.  Monday's record high is 100.  We'll see how close we get!

Take action to protect people and pets from the high heat, especially the young and old.  Stay hydrated, seek shade, and A/C.  Wear light weight, light colored clothing.  

We really haven't had heat like this so far this summer.  Our only prolonged hot stetch was in mid-June with mostly low 90s for 8 days in a row.  We only had a handful of 90s in July.   So far this August, we've only hit 90 two times.  Our hottest high temperature was 97, on the 13th of July.  

The Ironman Louisville competition is this Sunday - can you imagine!?

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