Records
Loma, Montana boasts as having the most extreme recorded temperature change in a 24-hour period. On January 15, 1972, the temperature rose from -54 to 49°F (-48 to 9°C), a 103°F (58°C) change in temperature, a dramatic example of the regional Chinook wind in action.
The Black Hills of South Dakota are home to the world's fastest recorded rise in temperature. On January 22, 1943, at about 7:30 am MST, the temperature in Spearfish, South Dakota was -4°F (-20°C). The chinook kicked in, and two minutes later, the temperature was 45°F (7°C). The 49°F (27°C) rise set a world record, yet to be exceeded. By 9:00 am, the temperature had risen to 54°F (12°C). Suddenly, the Chinook died down and the temperature tumbled back to -4°F (-20°C). The 58°F (32°C) drop took only 27 minutes.
The aforementioned 107-mph (172-km/h) wind in Alberta and other local wind records west of the 100th meridian on the Great Plains of the United States and Canada, as well as instances of the record high and low temperature for a given day of the year being set on the same date, are largely the result of these winds.
On rare occasions, Chinook winds generated on the eastern slope of the Rocky Mountains have reached or passed the Mississippi River.
Read more about this topic: Chinook Wind
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