Extreme Cold/Wind Chill — Black Hawk, Iowa

2025-01-20 to 2025-01-21 · Black Hawk, Iowa

Wider weather episode

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_id 1240059. Narrative written by the NWS forecast office that issued the report.