Clouds associated with servere weather?

Question

what types of clouds go with bad weather?

thanks

:D

Answer 1

Cumulonimbus

Answer 2

Cumulonimbus, cumulous,  towering cumulous. cumulous fractus.. of bad wx

Answer 3

Arcus clouds, which include roll clouds and shelf clouds all indicate a cold front being brought in by way of a severe thunderstorm

Roll Cloud-http://www.bom.gov.au/calendar/archive/2...

Shelf Cloud-http://content.answers.com/main/content/...

Cumulonimbus clouds are tall, stacking clouds that shape most supercell thunderstorms. They usually look like a giant anvil.

Cumulonimbus-http://www.capetownskies.com/full-size-f...

Mammatus clouds are lobe-like clouds that represent very turbulent and unstable air. They sort of make the sky look like it's boiling. When they appear under a thunderstorm, this usually signals a very strong storm. However, they don't always mean rain or bad weather is about to ensue.

Mammatus-http://www.stormchasing.ca/db4/00350/sto...

These are most of the cloud types I can think of that indicate severe weather... Hope it helped!