Excessive Heat — Mills, Iowa

2024-07-15 · Mills, Iowa

Event narrative

Heat indices up to 113 impacted portions of the county for a few hours during the afternoon.

Wider weather episode

Upper-level flow the evening of the 13th features a low-amplitude shortwave trough that had ejected out into the northern Great Plains. At the surface, a weakening stationary front was noted on WPC surface analysis to extend from northwest Nebraska into southeast Nebraska. Isolated strong thunderstorms that developed along this boundary brought a single severe wind gust in Knox County. However, the primary impact of this episode was the excessive heat that impacted much of southeast Nebraska and southwest Iowa. Heat indices the afternoon of the 15th in this area peaked between 110 and 115 degrees. The highest heat index was 117 degrees, observed by an AWOS station in Harlan, Iowa.

Source: NOAA Storm Events Database, event_id 1206693. Narrative written by the NWS forecast office that issued the report.