Chinook
Chinook (Sinuk, Chinook) is a feng style that blows down to the east side of the North American Rocky Mountains. Within 24 hours the temperature rises by more than 20 degrees and the humidity drops below 10 percent. Sometimes it is called Snow-eater because it quickly melts mountain snow. The Okanagan Valley, a mountainous basin in the Rocky Mountains of Canada, where many mountain ranges run, desert climate develops due to this wind and it is suitable for grape cultivation. ▪ On January 22, 1943, the rapid temperature change was observed at Spearfish, South Dakota. It was -4 ° F (-20 ° C) around AM 7: 30 (MST), but it was 45 ° F (7 ° C) after 2 minutes. The temperature rise of 49 ° F (27 ° C) / 2 minutes is a world record. Then it was 54 ° F (12 ° C) at 9:00 AM, 58 ° F (32 ° C) after 27 minutes and it was -4 ° F (-20 ° C). It is also common in the southern part of Alberta, Canada, and there is a record that rose by 41 ° C from -19 ° C to + 22 ° C in 1 hour near Lethbridge (February 1962). ...