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"Chinook" is used for coastal Chinook winds in British Columbia, and is the original use of the term, being rooted in the lore of coastal natives and immigrants, and brought to Alberta by French-speaking fur-traders. [1] [9] Such winds are extremely wet and warm and arrive off the western coast of North America from the southwest.
The winds that result are often gusty and can also create dramatic temperature changes by pushing away cold air at lower elevations. One of the most extreme examples of warming from a chinook ...
In the Great Plains of the United States, these winds are known as a chinook. Downslope winds also occur in the foothills of the Appalachian mountains of the United States, [57] and they can be as strong as other downslope winds [58] and unusual compared to other foehn winds in that the relative humidity typically changes little due to the ...
Heating caused by the compression of descending air is responsible for such winter phenomena as the chinook (as it is known in western North America) or the Föhn (in the Alps). Movie of the solar photosphere observed with the Swedish 1-m Solar Telescope (SST) on La Palma, Spain.
Jan. 23—Chinook winds blew through Southcentral Alaska on Friday and Saturday, bringing unseasonably warm weather, slush, ice and rain to Anchorage and surrounding areas.
Overnight temperatures on the Montana Hi-line are forecast to drop as low as -30 by Saturday morning. Great Falls will see gusty Chinook winds on Tuesday followed by snow and bone chilling cold.
These breezes occur mostly during calm and clear weather. Mountain and valley breezes are other examples of local winds caused by an area's geography. Campers in mountainous areas may feel a warm afternoon quickly change into a cold night soon after the sun sets. During the day, the sun warms the air along the mountain slopes.
California Governor Jerry Brown issued a state of emergency for Napa, Sonoma, and Yuba counties, a declaration that mobilizes the California National Guard.