(9:00PM Sat, Aug 19th 2023) As a ridge develops and builds into the region, a push of hot and humid conditions is expected across the state. These conditions are expected for a multi-day period, from late this weekend through late this upcoming week.

Timing & Location…
•Sun, Aug 20th: Much of Illinois.
•Mon, Aug 21st: Northwestern, Central & Southern Illinois.
•Tue, Aug 22nd: All of Illinois.
•Wed, Aug 23rd: All of Illinois.
•Thur, Aug 24th: All of Illinois.
•Fri, Aug 25th: Northwestern, Central & Southern Illinois.

Impacts…
•Sun, Aug 20th: High temperatures of 90-100 across much of Illinois, with peak heat indices of 95-115.
•Mon, Aug 21st: High temperatures of 90-98 across Northwestern, Central and Southern Illinois, with peak heat indices of 97-115.
•Tue, Aug 22nd: High temperatures of 90-100 across all of Illinois, with peak heat indices of 100-115.
•Wed, Aug 23rd: High temperatures of 93-100 across all of Illinois, with peak heat indices of 100-115.
•Thur, Aug 24th: High temperatures of 94-103 across all of Illinois, with peak heat indices of 100-115.
•Fri, Aug 25th: High temperatures of 87-100 across Northwestern, Central and Southern Illinois, with peak heat indices of 97-110.