multi-vortex

These streaks and eyewitness accounts lead us to believe that this was a multi-vortex tornado (more than one funnel circulating around the parent tornado circulation).

Eight years ago: Tornado devastates La Plata, Md. 2010

These streaks and eyewitness accounts lead us to believe that this was a multi-vortex tornado (more than one funnel circulating around the parent tornado circulation).

Eight years ago: Tornado devastates La Plata, Md. 2010

And some of the reports said major multi-vortex, which means different suction spots moving around each other in a very large tornado.

CNN Transcript Mar 29, 2007 2007

And there is a-- there's a big-time science to this, figuring out whether it was just one arm of a, what we call, multi-vortex tornado with little suction spots spinning around and around and around.

CNN Transcript Oct 19, 2007 2007

Almost two cones, but what I'm assuming is this is a multi-vortex text tornado; probably two little storms rotating around each other.

CNN Transcript Oct 18, 2007 2007

Scientists said it appeared to be a rare "multi-vortex" tornado, with two or more small and intense centres of rotation orbiting the larger funnel.

WalesOnline - Home 2011

"It was only moments later that a multi-vortex tornado formed, literally, right over our caravan," Skilling said in a phone interview from the road.

chicagotribune.com - 2010

multi-vortex , hiding two or more cyclones within the wider wind funnel.

The Washington Post: National, World & D.C. Area News and Headlines - The Washington Post Brian Vastagand Ed O’Keefe 2011