A prolonged heat wave gripped most of southern Illinois for several days. From the 4th to the 8th, peak afternoon heat indices ranged from 105 to 120 degrees. The exception was the Interstate 64 corridor from Mount Vernon to Mount Carmel, where the dangerous levels of heat lasted only from the 4th until the 6th. The hottest day in southern Illinois was the 5th, when the heat index peaked between 111 and 120 at all airport sites. During this heat wave, a sprawling 500 mb high covered most of the southern states from the southern Plains to the southern Appalachian Mountains. Beneath this large 500 mb high, daily high temperatures frequently soared into the mid and upper 90's. Night-time temperatures were quite warm. Carbondale set a daily record warm low temperature of 79 degrees on the 6th.

Excessive Heat in JEFFERSON, ILLINOIS
From 04-JUL-22 11:00:00 to 06-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WAYNE, ILLINOIS
From 04-JUL-22 11:00:00 to 06-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in EDWARDS, ILLINOIS
From 04-JUL-22 11:00:00 to 06-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WABASH, ILLINOIS
From 04-JUL-22 11:00:00 to 06-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in ALEXANDER, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in PULASKI, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in MASSAC, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in UNION, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in JOHNSON, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in POPE, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in HARDIN, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in JACKSON, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Excessive Heat in WILLIAMSON, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in SALINE, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in GALLATIN, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in WHITE, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in HAMILTON, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in FRANKLIN, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Excessive Heat in PERRY, ILLINOIS
From 04-JUL-22 11:00:00 to 08-JUL-22 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS