Roger's SkyPix

SkyPix Tornadoes

Colorado Landspout

Colorado Landspout

A "landspout" is storm-observer slang for a non-supercell tornado, most often seen in relatively dry enviromnents with weak wind shear and high-based thunderstorms. On this day, vertical shear favored supercells (and one did develop farther south); however, the process behind this tornado was not that of a mesocyclone. Such tornadoes typically take shape as a translucent dust column, like this, and sometimes beneath funnel clouds, unlike this.

2 ESE Otis CO (4 Jun 4) looking SW.