GEOG 1112 Chapter 12: Chapter 12: Small-Scale Winds
5 Dec 2017
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Document Summary
Straight lines appearing in the clouds, when the air is jostled, caused by winds, a growing thunderstorm blocking winds path such as a mountain, or by changes in the jet stream. Alternating patterns of high and low pressure maintained by gravity. Pilots avoid these, as they can cause turbulence. Wind charges in the jet stream send out ripples of waves. Local wind circulations form around the great lakes because of the resulting pressure. Cloudless region on lake superior and lake michigan is cool lake air. Border between land air and over lake air can be a prime location for thunderstorm development, like a small-scale front. An hours-long windstorm associated with a line of severe thunderstorms. Result of straight line winds, not rotary of a tornado. High winds push the thunderstorm outward, causing bending or bow ing. Associated with an extensive squall line and low pressure system. Smaller, combination of both a progressive and serial derecho.
