Heat — Yellowstone National Park, Wyoming

2021-06-11 to 2021-06-17 · Yellowstone National Park, Wyoming

Event narrative

Well above normal temperatures occurred in Yellowstone Park. The highest temperature was 91 degrees at Mammoth Hot Springs on June 15th.

Wider weather episode

A strong ridge parked over the northern Rockies and brought very hot temperatures to much of western and central Wyoming. All of the lower elevations saw high temperatures 90 degrees or above with many high temperatures over 100 in the lower elevations East of the Continental Divide. The Greybull and Johnson County airports tied their all time record highs of 108 and 104 degrees respectively, on June 15th. The high of 106 at the Worland airport on June 15th missed the all time record high by 1 degree.

Source: NOAA Storm Events Database, event_id 964943. Narrative written by the NWS forecast office that issued the report.