Nov 14, 2013 01:58 PM EST
Roll Cloud Spotted in Texas: 'Horizontal Tornado' Wind Formation Rare, Not Dangerous (Video)
When residents of Armarillo, Tex., peaked outside their windows right before sunrise last week, they might have been a bit surprised. Of course, the forecast may have noted cloudy conditions, but it certainly didn't prepare them for this peculiar picture: a long, tube-shaped formation called a roll...