Extreme Cold/Wind Chill in Union, Iowa

Extreme Cold/Wind Chill January 21, 2025 · Union, Iowa

The wider storm

A shortwave passed across the area on the 20th, increasing cold air advection into Iowa. That evening temperatures plummeted as cloud cover and wind diminished, allowing for strong radiational cooling. Apparent temperatures fell into the -30s across the area through Tuesday morning before recovering.

Source: NOAA Storm Events Database, event 1240080. Narratives are written by the National Weather Service forecast office that issued the report.

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