Mammatus Clouds Observed over Berlin, Germany

May 04, 2021


Cumulonimbus Mammatus - Eric Maltz

Photographer: Eric Maltz 

Summary Authors: Eric Maltz; Jim Foster

These eye-catching mammatus clouds appeared just after a turbulent, late afternoon thunderstorm moved through Berlin, Germany, on March 11, 2021. The pouches form when colder air moving downward within the cumulonimbus cloud structure pushes into the storm's cloud base. Mammatus are more often seen following a severe storm than preceding it.