Heat indices peaked around 110 degrees on three consecutive afternoons across much of southern Illinois. Places north of a line from Carbondale to Harrisburg peaked around 110 on only two afternoons, which were the 28th and 29th. The maximum observed heat indices at several cities over the three-day period included: 111 degrees at Carbondale, 113 at Marion, 115 at Metropolis, 114 at Cairo, 110 at Mount Vernon, and 111 at Fairfield. All of the preceding sites were airport sites. A 500 mb high over the southern Plains built slowly east and northeast into the Mid-Mississippi Valley. At the surface, weak high pressure over the Tennessee Valley produced a persistent southwest wind flow.

Excessive Heat in Perry, ILLINOIS
From 28-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Jefferson, ILLINOIS
From 28-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Wabash, ILLINOIS
From 28-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Wayne, ILLINOIS
From 28-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in White, ILLINOIS
From 28-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Alexander, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Gallatin, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Hardin, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Jackson, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Excessive Heat in Johnson, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Excessive Heat in Massac, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Pulaski, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Pope, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Saline, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Union, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Edwards, ILLINOIS
From 28-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Williamson, ILLINOIS
From 27-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Franklin, ILLINOIS
From 28-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in Hamilton, ILLINOIS
From 28-JUL-15 12:00:00 to 29-JUL-15 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS