Encore - Rolling Clouds Over Lofoten, Norway
May 11, 2019
Today and every Saturday Earth Science Picture of the Day invites you to rediscover favorites from the past. Saturday posts feature an EPOD that was chosen by viewers like you in our monthly Viewers' Choice polls. Join us as we look back at these intriguing and captivating images.
Photographer: Roy Storkersen
Summary Author: Roy Storkersen 
In late June 2013, the rolling cloud pictured above swept over Lofoten, Norway. Here in the high north we had never experienced such a weather phenomenon before. We called it han tykje (the devil). Roll clouds aren't just associated with thunderstorms or confined to regions where tropical weather prevails. Though they're rarely observed in Arctic areas, they can be seen anywhere strong outflow boundaries form -- they tend to form immediately behind these boundaries. Click here to see a video of this amazing cloud. Photo taken on June 28, 2013.
Photo Details: Canon EOS 550 D camera; 1/40th sec. exposure; aperture f/4.5; Canon EFS 17-mm 2.8 lens.
[4/19]9/9/2013