In 1916, the American state of Montana experienced the sharpest cold snap in the history of meteorological observations.
One winter night the temperature dropped by 55.5 degrees.
The weather record has stood for almost 100 years.
The record drop in air temperature occurred on the night of January 23-24, 1916 in the town of Browning.
In a short period of time, the temperature dropped from +6.7 degrees to -48.8 degrees.
In the 98.5 years since then, the world has never seen a sharper cold snap.
But residents of the town of Spearfish in the American state of South Dakota encountered the opposite phenomenon.
It happened on the morning of January 22, 1943.
At 07:30 the air temperature was -20 degrees, but after just 2 minutes the reading was +7.2 degrees.
In other words, the temperature jump was 27.2 degrees. This is the sharpest warming in the entire history of meteorological observations.