Extreme Cold/Wind Chill — Southwest Big Horn Basin, Wyoming

2019-10-28 to 2019-10-30 · Southwest Big Horn Basin, Wyoming

Event narrative

Temperatures around Hot Springs county, Wyoming dropped as low as 10 below zero.

Wider weather episode

An arctic front dropped southward across Wyoming and brought in an unusually cold air mass. The result was many records were broken. The locations that saw monthly record low temperatures broken included Casper, Riverton and Lander, Wyoming. The coldest temperatures occurred in the morning of October 30th. The most impressive was at Big Piney, Wyoming, where a combination of a clear sky, fresh snow cover and light winds resulted in a low of minus 26, which broke the record by 29 degrees. Note: All low temperatures in events occurred in the morning of October 30th.

Source: NOAA Storm Events Database, event_id 860208. Narrative written by the NWS forecast office that issued the report.