Daily Postcard: Mammatus clouds fill the sky early Thursday evening over Western Area. Contrary to popular conspiracy theories, mammatus (mammary) clouds are not a recent phenomenon and were first described in 1894 by William Clement Ley. These clouds are pouch-like structures protruding from the underside of a thunderstorm anvil. They are caused by sinking cool air and may persist for tens of minutes. While they can be associated with severe thunderstorms, they are not a direct sign of impending severe weather. Source: learnweather.com. Photo by Terry Goldman
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Daily Postcard: Mammatus Clouds Cover Western Area
- Submitted by Carol A. Clark
- on June 17, 2022
- - 5:39 am
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