5.1K views · 429 reactions | Check out these clouds! They are called mammatus. Mammatus clouds are most often associated with severe thunderstorms. WeatherNationTV.com | WeatherNation | Facebook

Mammatus clouds forming at sunset, as captured by photographer and storm chaser Jason Weingart. ​ "Mammatus" comes from the Latin "mamma" which translates to "udder" or "breast". They generally form in unstable cumulonimbus clouds, and are associated with a chance of hail. Their distinctive appearance is most noticeable at sunset, like here, when their pouches are framed by the sunlight. ​ ​Video credit: Jason Weingart. Check out his page for more awesome storm photos and video: https://www.face

Mammatus clouds roll across Oklahoma sky