Explanation:

The chinook, a native word meaning "snow eater," belongs to a family of winds experienced in many parts of the world where long mountain chains lie more or less at right angles to the prevailing wind.
Statement 1: It is a warm and dry westerly wind that blows down the Rocky Mountains into the mountains' eastern slopes and the western prairies.
? The Chinook wind provides a welcome respite from the long winter chill. A strong Chinook can make large amounts of snow vanish in less than a day.
? Chinook winds have been observed to raise winter temperature, often from below -20 °C to as high as 10-20 °C for a few hours or days, then temperatures plummet to their base levels