A large, nearly stationary upper level high centered over eastern Kansas and Missouri and a dome of unseasonably warm air aloft dominated the weather picture from August 26 through August 30, 2013. This was the hottest weather of the entire summer. Maximum temperatures soared into the 90s during much of this period with several locations reporting lower 100's on August 30. In fact, record high temperatures were either broken or tied at Cedar Rapids, Iowa and Moline, Illinois during this heat wave. In addition to the heat, dew points were well in the 60s to lower 70s which pushed heat index values to 100 to 105, with a few locations reporting 110 degrees. Schools without air-conditioning either canceled classes or  dismissed students early. In many cities and towns, cooling centers were opened.

Heat in BUREAU, ILLINOIS
From 27-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in CARROLL, ILLINOIS
From 27-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in HANCOCK, ILLINOIS
From 26-AUG-13 11:00:00 to 30-AUG-13 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A COOP observer at Bentley reported a maximum temperature of 102 degrees on August 30.

Heat in HENDERSON, ILLINOIS
From 26-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in HENRY, ILLINOIS
From 27-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in JO DAVIESS, ILLINOIS
From 27-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in MCDONOUGH, ILLINOIS
From 26-AUG-13 11:00:00 to 30-AUG-13 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in MERCER, ILLINOIS
From 26-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer at Aledo reported a maximum temperature of 100 degrees on August 30.  Another observer at New Boston also had a high of 100 degrees.

Heat in PUTNAM, ILLINOIS
From 27-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in ROCK ISLAND, ILLINOIS
From 26-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A record high temperature of 97 degrees was set at Moline on August 28. This broke the old record of 96 set in 1953.
A record high temperature of 98 degrees was set at Moline on August 30. This tied the old record of 98 set in 1953 and 1947.

Heat in STEPHENSON, ILLINOIS
From 27-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in WARREN, ILLINOIS
From 26-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in WHITESIDE, ILLINOIS
From 27-AUG-13 11:00:00 to 30-AUG-13 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The maximum temperature at Sterling soared to 100 degrees on August 30.