#WxGeekSpeak: Shelf Clouds

Every week, the blog introduces you to a technical term from the American Meteorology Society’s “Glossary of Meteorology”. Welcome to #WxGeekSpeak!

Affectionately known as “shelfies” on Twitter, these clouds can foreshadow severe weather. Click the video above to learn how shelf clouds develop.

Full definition of shelf clouds: A low-level, horizontal, wedge-shaped arcus cloud associated with a convective storm‘s gust front (or occasionally a cold front).

 The shelf cloud is attached to the convective storm’s cloud base. Rising motion can be seen in the leading (outer) part of the shelf cloud, while the underside appears turbulent and tattered.

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