Heat in Lyon, Iowa

Heat August 15, 2025 – August 16, 2025 · Lyon, Iowa

What the National Weather Service wrote

Heat index values peaked as high as 102 degrees 4 miles southwest of George on August 15 and 100 degrees 5 miles south-southwest of Ellsworth and at Larchwood on August 16.

The wider storm

Heat and moisture pooled near and south of a nearly stationary frontal boundary across eastern South Dakota and southern Minnesota. Daily highs were in the mid 80s to lower 90s with dew point values in the upper 70s to lower 80s, yielding heat index values from 100 to 115 degrees.

Source: NOAA Storm Events Database, event 1291158. Narratives are written by the National Weather Service forecast office that issued the report.

Tornadoes near your address

See every tornado that passed near a place you know, measured to its path.