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

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

Event narrative

There were widespread temperatures below zero in Washakie County. At the Worland, Wyoming Airport, the low of minus 4 on the morning of October 30th broke the all time October record of minus 3 that was set in 1991.

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 860221. Narrative written by the NWS forecast office that issued the report.