Unusual mammatus clouds were spotted on Wednesday morning in parts of the United Kingdom. The name mammatus comes from the ...

hail and lightning. Bulging pockets of cloud called mammatus were spotted in Knaresborough, North Yorkshire Mammatus is most often found at the base of a thunderstorm cloud called cumulonimbus.

So, while everyone knows that lightning ... clouds—taking the word ‘pyro’ from the Greek word for fire and cumulonimbus, the ...

When thunder roars, head indoors! According to NWS, there were 323 reported cloud-to-ground and cloud-to-cloud lightning strikes ... rising unstable air and a lifting element (such as a hill ...

Strange and disconcertingly named 'udder clouds' were seen hanging over London skies during sunset yesterday (Wednesday, ...

Cumulonimbus clouds, or thunderclouds ... At the Omiya Bonsai Art Museum in Saitama city, air conditioners failed during a lightning storm on the night of Aug. 7. Lightning hit the circuit ...

A frozen form of precipitation consisting of individual balls or lumps of ice called hail stones, produced from cumulonimbus or thunderstorm clouds. A bigger hail stone signifies a longer lifespan ...