Excessive Heat in Clinton, Illinois

Excessive Heat July 27, 2023 – July 29, 2023 · Clinton, Illinois

What the National Weather Service wrote

Excessive heat across the county with highs 95 to 100 each day. Heat index values as high as 110 each day.

The wider storm

Strong upper level ridge built up over the region from July 25th through 29th. This ushered in much warmer air and higher dewpoints. So heat index values 100+ were reported from July 25th through 29th. The hottest days were July 27th, 28th and 29th, so an excessive heat warning was issued for portions of northeast/east central Missouri and west central/southwest Illinois. At least 50 people were seen in hospital emergency room departments during this three day period in St. Louis County/City for heat-related illnesses.

Source: NOAA Storm Events Database, event 1141455. Narratives are written by the National Weather Service forecast office that issued the report.

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