#WxGeekSpeak: Hook Echo

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

If you’re from Tornado Alley, you’ve likely heard of the phrase “hook echo” when Doppler radar is on screen. This feature indicates a rotating thunderstorm. But why? Click the video above to see how this signature highlights an immediate tornado threat.

Full definition of hook echo: A pendant, curve-shaped region of reflectivity caused when precipitation is drawn into the cyclonic spiral of a mesocyclone.

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