A large upper level high over the south central states expanded over the Lower Ohio Valley on the 14th. This feature gradually retreated westward to the Southwest by the 18th. During much of this time period, surface high pressure over the central and southern Appalachian Mountains produced a south to southwest flow of hot and humid air. Heat indices reached 105 to 109 degrees across most of southern Illinois on the 14th and 15th, and only over a few locations on the 16th and 17th. Actual high temperatures were mostly in the middle 90's.

Heat in HAMILTON, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in HARDIN, ILLINOIS
From 15-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in JACKSON, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Heat in JEFFERSON, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in JOHNSON, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in MASSAC, ILLINOIS
From 15-JUL-10 11:00:00 to 16-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in PERRY, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in POPE, ILLINOIS
From 15-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in PULASKI, ILLINOIS
From 15-JUL-10 11:00:00 to 16-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in SALINE, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in UNION, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in WABASH, ILLINOIS
From 14-JUL-10 11:00:00 to 17-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in WAYNE, ILLINOIS
From 14-JUL-10 11:00:00 to 17-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in WHITE, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in WILLIAMSON, ILLINOIS
From 14-JUL-10 11:00:00 to 17-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in EDWARDS, ILLINOIS
From 14-JUL-10 11:00:00 to 17-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in ALEXANDER, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in FRANKLIN, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Heat in GALLATIN, ILLINOIS
From 14-JUL-10 11:00:00 to 15-JUL-10 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS