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Dr Mordrid
4th July 2006, 23:35
Mammatus (breast) clouds usually form under thunderheads & tornadic supercells due to a strong updraft, taking on the appearance of hanging sacs.

In the US they form mostly here in the midwest and in the eastern part of the country, but can form anywhere the conditions are right. Sometimes a storm doesn't even have to be that intense for them to form if the updraft is strong enough.

Often the sacs are quite large and low as in the second image, making some think they are tornados dropping. In fact they are more often a sign of the storm winding down.

Combined with a setting sun things can look rather freaky with colors ranging from gray to orange, red, yellow, purple or black. Just imagine looking out your picture window and seeing these over your house;

http://digitalvideo.8m.net/mammatus/mammatus2sm.jpg

http://digitalvideo.8m.net/mammatus/mammatus1sm.jpg

Dr. Mordrid

az
5th July 2006, 02:33
Nice! Did you take these?

GuchiGuh
5th July 2006, 02:51
amazing.
I'd be rather scared of those tentacles thou

dbdg
5th July 2006, 09:12
I'd love to see this is r/l

Elie
5th July 2006, 10:56
very nice and freaky at the same time :up:

ZokesPro
5th July 2006, 11:13
Awesome!!! Aside from in pictures, I've never seen cloud formations like these before.

Dr Mordrid
5th July 2006, 11:25
We see 'em all the time in the hot summer months, but then it's mostly the heat that causes the updrafts. Sometimes the sacs form within 100m of the ground, which is the freakiest view of all. Definitely makes you feel puny :p

Dr. Mordrid

Nowhere
27th September 2006, 15:47
http://valuca.funtigo.com/?preview=y&g=25544746&cr=1&rfm=y
many other "strange" clouds

http://www.flickr.com/photos/whooz_queen/82949737/in/set-72057594047857420/
And this one is indeed seriously wrong :p ;)