Extreme Cold/Wind Chill — Arco-mud Lake Desert, Idaho

2025-01-20 · Arco-mud Lake Desert, Idaho

Event narrative

Extreme cold wind chills affected the Arco and Mud Lake Desert region on the 20th. The coldest readings were -36 at INL Radioactive Waste Managment site, -35 at Big Southern Butte, and -34 at Atomic City.

Wider weather episode

A strong Canadian cold front brought the coldest temperatures of the winter season to southeast Idaho. Several apparent temperature readings of -20 to -55 degrees were recorded after midnight through mid morning on the 20th.

Source: NOAA Storm Events Database, event_id 1233229. Narrative written by the NWS forecast office that issued the report.