Extreme Cold/Wind Chill — Yellowstone National Park, Wyoming

2019-10-28 to 2019-10-30 · Yellowstone National Park, Wyoming

Event narrative

Very cold temperatures occurred in Yellowstone Park. Some of the coldest temperatures included minus 25 at the Old Faithful Ranger Station and minus 24 at the northeast Entrance. These low temperatures occurred on the morning of October 30th.

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 860215. Narrative written by the NWS forecast office that issued the report.