Extreme Cold/Wind Chill — Rock Springs & Green River, Wyoming

2019-10-28 to 2019-10-30 · Rock Springs & Green River, Wyoming

Event narrative

Extremely cold temperatures occurred around the region. Some of the lowest included minus 19 east of Little America and minus 13 in Green River, Wyoming.

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 860218. Narrative written by the NWS forecast office that issued the report.