Question

Which hot local wind blows in prairies?
A) Bora Bora
B) Chinook
C) Harmattan
D) Mistral

Answer 1

Hint:
The hot local winds in the prairies blow from the eastern slope of the Rocky Mountains and these raise the temperature during the winters. This strong wind makes snow about one foot deep to vanish in a day.

Complete step by step solution:
The hot local wind that blows in prairies is called Chinook. The word Chinook means a warming wind into the interior regions of the Pacific Northwest of the US from the ocean. Due to these winds, the snow partly melts and partly sublimates in the dry wind. It was observed that the Chinook wind can raise the temperature in winters, often below -20 degrees Celsius to as high as 10 – 20 degrees Celsius. These winds are most prevalent over southern Alberta in Canada. The speeds of these winds reach 120 km per hour (75 mph) with an excess of hurricane force in southwest Alberta. An especially powerful Chinook gusted to 171 km per hour (106 mph) in Lethbridge. Chinook arch is one of the most striking features. It looks like threatening storm clouds at times. Rain or snow is rarely produced by them. Stunning sunrises and sunsets are also created by them.

Thus, option (B) is correct.

Note:
Chinook arc has stunning colors which are quite common. These colors will change throughout the day. It starts with yellow, orange, red, and pink shades in the morning as the sun rises. In the midday, the grey shades change to pink, red, and then yellow or orange hues just before the sunset.