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

Mammatus clouds are one of the most peculiar cloud ... including lightning, hail, strong winds, and tornadoes. The presence of a towering cumulonimbus cloud often means violent weather is near ...

The fluffy, majestic clouds spotted in the area were called Mammatus clouds ... in the most unstable conditions with high chances of hail, heavy rain, and lightning nearby, which was the case ...

"Mammatus cloud generally form in the most unstable cumulonimbus, meaning that there is also a chance of hail, heavy rain and lightning in the vicinity, and if the air is cold enough during winter ...

Formed by cold air sinking down, mammatus clouds are usually seen when there is turbulence in a cumulonimbus cloud. A US Coast Guard rescue swimmer was lowered to pull the woman as high waters ...

These clouds are often associated with thunderstorm clouds and accompanied by rain, hail and lightning. Mammatus is most often found at the base of a thunderstorm cloud called cumulonimbus.

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.