- published: 24 Apr 2015
- views: 10958
A landspout is a term coined by meteorologist Howard B. Bluestein in 1985 for a kind of tornado not associated with the mesocyclone of a thunderstorm. The Glossary of Meteorology defines a landspout as
Landspouts form during the growth stage of convective clouds by stretching boundary layer vorticity upward and into the cumuliform tower's updraft. They generally are smaller and weaker than supercellular tornadoes and do not contain a mesocyclone or pre-existing rotation in the cloud. Because of this, landspouts are rarely detected by Doppler weather radar.
Landspouts share a strong resemblance and development process to that of waterspouts, usually taking the form of a translucent and highly laminar helical tube. Landspouts are considered tornadoes since a rotating column of air is in contact with both the surface and a cumuliform cloud. Not all landspouts are visible, and many are first sighted as debris swirling at the surface before eventually filling in with condensation and dust. Landspouts are most common in semi-arid climates characterized by high cloud bases and considerable low-level instability. These conditions tend to favor the High Plains of the United States from Spring through Summer.
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A tornado near Loraine, Texas, on April 23 kicked up a lot of mud and dust. This dramatic footage shows the twister's formation. Credit: Facebook/Stan Cole
In this video, I will explain the difference of a landspout and a tornado. I will also tell how they form.
Another day out on the farm... hot windy weather gave rise to this massive big, huge dirt dust-devil tornado! I've never seen one so big. My first edited video, hope y'all like! Enjoy! Subscribe for more wild n random outdoor and farming vids. 🚜✌🏼️
During the late afternoon of April 29, 2015, minor damage occurred at a barn southwest of Whitewater, WI. A trained storm spotter indicated a landspout (or gustnado) that spun up from the ground. Rain showers, no thunder, and a cool breeze off of Lake Michigan interacted to create this unusual phenomenon. In this video, FOX6 Milwaukee Chief Meteorologist Vince Condella explains how these landspouts form.
Video from on-foot of land spout tornadoes on June 7, 2013 beneath a line of convective updrafts/storms coincident with a strong temperature gradient and super adiabatic lapse rates beneath the high cloud bases. This is Tim, Paul, and Carl's way of saying hello. We saw these on the way back from their memorial service driving back home from Denver area. RIP
Jesse Walters of JWSevereWeather documents landspouts and turbulent weather from Gridley, Il. Shot Description Shot 1-5 - Multiple landspout tornadoes occurring just north and east of Gridley, Il Shot 6-10 - Ominous cloud patterns east of Gridley, Il, after landspout occurrences.
A spout of dust that touched the hevens.