Excessive Heat — Marion, Missouri

2023-07-27 to 2023-07-28 · Marion, Missouri

Event narrative

Excessive heat across the county with highs in the upper 90s to 102 degrees each day. Heat index values as high as 110 both days.

Wider weather episode

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_id 1141417. Narrative written by the NWS forecast office that issued the report.