Share your favorite shelfies (photos or video of shelf clouds) to our /photos gallery, our Facebook page, or via Twitter MORE PHOTOS: 10 Spectacular Clouds | Earth's Highest Clouds | Hole-Punch Clouds) MORE ON WEATHER. The National Weather Service in Lubbock, Texas, documented a spectacular case of cold-frontal roll clouds in late September 2007. The cloud, often associated with thunderstorms and known as an Arcus Cloud, spanned a broad arc and left viewers in awe. Either the gust front surged well away from the parent thunderstorm(s), or the thunderstorm(s) may have fizzled, leaving this remnant roll cloud.Īdvancing cold fronts have also triggered roll clouds on occasion. A massive shelf cloud was captured on video in Haridwar, Uttarakhand, amidst heavy rainfall across North India. Unlike a shelf cloud, the roll cloud is detached from its parent thunderstorm(s). Thousands of new images every day Completely Free to Use High-quality videos and images. ![]() Wind gusts once the shelf cloud has passed may be quite strong, causing downed trees, tree limbs and power outages. Download and use 80000+ Shelf Cloud stock photos for free. When this warm, moist air condenses, you see the shelf cloud.Īs the shelf cloud passes, you feel an abrupt shift in wind direction and increased wind speed, followed within minutes by heavy rain or hail. Warmer, more moist air is lifted at the leading edge, or gust front, of this rain-cooled air. Rain-chilled air descends in a thunderstorm's downdraft, then spreads laterally when reaching Earth's surface. What you're seeing in a shelf cloud is the boundary between a downdraft and updraft of a thunderstorm or line of thunderstorms. ![]() ( PHOTOS: Scary Clouds That Are Not Tornadoes) While menacing in appearance, shelf clouds are not tornadoes or wall clouds. Shelf clouds are typically seen at the leading edge of a thunderstorm or squall line of thunderstorms. To understand how roll clouds form, we first must explain how shelf clouds develop. One video, which went viral on July 10, is of a spectacular cloud formation. The first two photos in the slideshow from Lake Hendricks, Minnesota, on June 20, 2015, show a terrific example of a roll cloud. Videos of rivers in spate, flooded roads, landslides, and bridges being swept away have been doing the rounds online. Based on their appearance, we certainly understand why.Ī more rare variety of this type of cloud, a roll cloud, resembles a giant rolling pin in the sky. ![]() A shelf cloud, also known as an arcus or arc cloud, may be the most frequently submitted cloud photo to our photo gallery and Facebook page.
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