Clouds can be very impressive, and sometimes even scary! In this photography tour, we’ll be looking at the incredible Arcus cloud formations. If you’ve ever seen one of this, it’s likely you’ll never forget it, even if you didn’t know the name for it at the time. There is such diversity in the types of clouds and the designs they can take. It is quite fascinating to see these pictures. Enjoy!
First up are Roll clouds which are one of two cloud types under the heading of Arcus cloud. Roll clouds are usually seen detached from other cloud features. As you can guess, this cloud forms a long horizontal tube shape and is relatively rare. There is one place in the world where roll clouds occur frequently and that is in Queensland, Australia. There will be a photo below of these roll clouds called Morning Glory clouds.
Roll Cloud Under Thunderstorms – Racine, Wisconson
Photograph by Eazydp
Roll Cloud Over Las Olas Beach, Uruguay
Photograph by Daniela Mirner Eberl
Roll Cloud off the Coast of Brazil
Photograph by Capt. Andeas M. van der Wurff
Morning Glory Cloud (Roll Cloud)
Morning Glory clouds can be observed from Burketown from late September to early November. There are generally only a handful of well-formed spectacular clouds during this period at Burketown. During the 2012 season, there were only four to be seen from there, but quite a few ragged unspectacular cloud lines were seen. Often they start to break up before arriving at Burketown or pass to the north and only stay well-formed over water. In an aircraft, there is a significantly better chance of sighting the cloud.
A Morning Glory cloud is a Roll cloud that can be up to 620 miles long, 0.62 to 1.2 miles high, often only 330 to 660 feet above the ground and can move at speeds up to 37 miles per hour. Sometimes there is only one cloud, sometimes there are up to eight consecutive roll clouds.
The Morning Glory is often accompanied by sudden wind squalls, intense low-level wind shear, a rapid increase in the vertical displacement of air parcels, and a sharp pressure jump at the surface. In the front of the cloud, there is strong vertical motion that transports air up through the cloud and creates the rolling appearance, while the air in the middle and rear of the cloud becomes turbulent and sinks.
Morning Glory Cloud – Burketown, Australia
Photograph by Mick Petroff
The other type of Arcus cloud is the shelf cloud–usually attached to the base of a parent cloud. In most cases, the parent cloud is a thunderstorm but can turn up with any convective cloud formations. Shelf clouds are found at the front of storms and are not to be mistaken with wall clouds which form at the rear of a storm. Following are some shelf cloud formations.
Shelf cloud over Wagga Wagga NSW, Australia
Photograph by Bidgee
Shelf Cloud – Enschede, The Netherlands
Photograph by John Kerstholt
Shelf Cloud on the Baltic Sea Near Island Oland, Sweden
Photograph by Arnold Paul
Shelf Cloud Over Rapid City South Dakota
Photograph by unknown
Another Shelf Cloud
Photograph by Longyester
Shelf Cloud Over East Lansing Michigan
Photograph by Veryhuman
Kearney Nebraska Self Cloud
Photograph by nebraskasc
Those are some amazing photos! If you liked them, we’d love it if you shared this page with your friends! …
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