'Finally, you need some sort of triggering process to set it all off in today's case, we had the convergence of air on the dryline southwest of Moore,' Brewster told LiveScience on Monday night.

To rev up a tornado, wind shear, or a change in wind speed and direction with height, is also needed. 'Right in that location, we call that the local mescoscale, everything was just right in that storm for it to create that really violent vortex.' If you'd gone 25 miles to the north, they had storms but no tornado,' Van Speybroeck said. 'The atmosphere was just right in Moore, Oklahoma, for a violent tornado. Essentially, the perfect storm seemed to come together right over Moore. Those ingredients were in place yesterday. 'There are several ingredients involved in the creation of a tornado these include a source of warm, moist air at the surface and colder, generally drier, air above.' 'The jet stream had a role, but of course, it is much more complex than that,' Keith Brewster of the Center for Analysis and Prediction of Storms at the University of Oklahoma told LiveScience. Tornado science is complex and several ingredients are needed to create a monster vortex like the one that spun through Moore and even then, meteorologists say they can't identify exactly which storms will spawn tornadoes. The Jackson office cautioned it was still gathering information on the tornado.'The debris ball from the tornado, as seen on Doppler radar, expanded to over 2 miles in diameter, and debris was carried over 100 miles from Moore,' Jeff Masters of Weather Underground wrote on his WunderBlog. An EF-4 tornado has top wind gusts between 166 mph and 200 mph (265 kph and 320 kph), according to the service. “There’s just the breeze that’s running, going through - just nothing.”īased on early data, the tornado received a preliminary EF-4 rating, the National Weather Service office in Jackson said late Saturday in a tweet.

“There’s nothing left,” said Wonder Bolden, holding her granddaughter, Journey, while standing outside the remnants of her mother’s now-leveled mobile home in Rolling Fork. Residents hunkered down in bath tubs and hallways during Friday night’s storm and later broke into a John Deere store that they converted into a triage center for the wounded. The tornado devastated a swath of the Mississippi Delta town of Rolling Fork, reducing homes to piles of rubble, flipping cars on their sides and toppling the town’s water tower. (AP) - Rescuers raced Saturday to search for survivors and help hundreds of people left homeless after a powerful tornado cut a devastating path through Mississippi, killing at least 25 people, injuring dozens, and flattening entire blocks as it carved a path of destruction for more than an hour.

Is river wind casino damaged by tornado