Mammatus Clouds Over South Central Germany

May 22, 2012

Mammatus_e (2)

: Jens Hackmann; Jens Web site
Summary Author: Jens Hackmann; Jim Foster

I had a nice vantage point to see the approach of some nasty weather in south-central Germany earlier this month. Though severe storms never materialized, looking east at the late day sky I noticed mammatus clouds had formed. These pendulous clouds result from downdrafts of cold air within mature thunderstorm cells. They're frequently reported on the underside of a cumulonimbus anvil. Because the air that forms them is sinking, it's likely that the part of the storm where they're observed is losing strength. Photo taken on May 6, 2012.

Photo details: Camera Maker: Canon; Camera Model: Canon EOS 5D Mark III; Lens: EF24mm f/1.4L USM; Focal Length: 24mm; Focus Distance: Infinite; Aperture: f/5.6; Exposure Time: 0.0016 s (1/640); ISO equiv: 100; Exposure Bias: none; Metering Mode: Matrix; Exposure: Manual; Exposure Mode: Manual; White Balance: Auto; Flash Fired: No (enforced); Software: Adobe Photoshop Camera Raw 6.7 (Windows).