Extreme Cold/Wind Chill — Southeast Johnson County, Wyoming

2020-04-03 · Southeast Johnson County, Wyoming

Event narrative

Very cold temperatures occurred in southern Johnson County. The lowest temperature recorded was 5 below zero at Kaycee, Wyoming.

Wider weather episode

A combination of an unusually cold air mass, calm wind and fresh snow cover brought very cold temperatures to much of western and central Wyoming. Temperatures as low as 19 below occurred in Yellowstone Park. Several stations had all time record lows for the month of April, including Riverton, Buffalo, Greybull and Worland, Wyoming. The record low temperature at Worland, Wyoming was especially noteworthy, since it broke a record that stood since 1947.

Source: NOAA Storm Events Database, event_id 884368. Narrative written by the NWS forecast office that issued the report.