Excessive Heat — Union, Illinois

2024-07-30 to 2024-07-31 · Union, Illinois

Wider weather episode

Portions of Southern Illinois reached heat indices of 104-109F on the 29th, with more widespread heat indices of 105-116F on the 30th and 31st, extending into the start of August. Dew points reached the upper 70s on the 30th and 31st. The highest heat index reached in Southern Illinois was 116F at the Dixon Springs RAWS site on the 30th. Mid to late afternoon severe thunderstorms interrupted the heat on the 30th.

Source: NOAA Storm Events Database, event_id 1202767. Narrative written by the NWS forecast office that issued the report.