Colossal supercell thunderstorm cloud just west of Glasgow, Montana. The colossal storm systems center on mesocyclones, which are rotating updrafts that can span several kilometers and deliver torrential rain and high winds including tornadoes. Jagged clouds surround the supercell’s core, which is filled with dust and rain swept by the wind.
Photo credit: Sean R. Heavey
“A friend took this pic in Arizona USA. The meteorologists don’t have a name for it.
Seems to be high energy to be in a Rainbow and a tornado! ”
(source: Council of World Elders)
In late summer the area between Kluane Lake and Haines Junction, Yukon, commonly produces stacked lenticular clouds. Lenticular clouds, technically known as altocumulus standing lenticularis, are stationary lens-shaped clouds that form at high altitudes, normally aligned at right-angles to the wind direction.
Photo credit: David Cartier
On December 24, 2012, a strange double helix cloud was spotted just outside Moscow, Russia. A series of amateur photographs were submitted to a Russian site called netall.ru. While it is not entirely known what caused such a phenomenon, it is believed it may be a contrail. Contrails, short for “condensation trails” or vapor trails are long thin artificial clouds that sometimes form behind an aircraft.
Snow rollers are a very rare phenomenon where snowballs form naturally by a very strong wind blowing across a flat, snow covered field when the snow is easily compacted (snow temperature near 32°F/0°C)