Chinook is a hot wind that blows in winter and therefore raises the temperature within a short time. It is the correct answer for the given question.

Explanation:
Chinook is a type of wind that occurs in certain regions, especially in North America. It is a warm and dry wind that blows down the eastern slopes of the Rocky Mountains and can significantly raise the temperature in a short period, even during the winter season.

Characteristics of Chinook:
- Warm and Dry: Chinook winds are warm and dry as they originate from the Pacific Ocean and lose their moisture while crossing the mountains.
- Downhill Flow: These winds flow downhill from higher elevations to lower elevations, creating a warming effect.
- Foehn Effect: The warming effect of the Chinook wind is due to the foehn effect, which occurs when air is forced up and over a mountain range. As the air rises, it cools and releases moisture, forming clouds and precipitation on the windward side of the mountains. On the leeward side, the air descends and heats up, resulting in warm and dry conditions.
- Rapid Temperature Changes: The Chinook wind can cause rapid temperature changes, sometimes raising the temperature by several degrees within a short period. This phenomenon is often referred to as a "Chinook heat wave."
- Winter Phenomenon: Chinook winds are more common during the winter season when there is a significant temperature difference between the warm Pacific air and the cold air on the eastern side of the Rockies.
- Regional Variations: While Chinook winds are most well-known in North America, similar warm downslope winds occur in other parts of the world, such as the foehn wind in the European Alps and the Nor'west Arch in New Zealand.

Overall, the Chinook wind is a unique weather phenomenon that brings warm and dry conditions, leading to a rapid increase in temperature, especially during the winter season.