several minutes or hours
The average tornado lasts for about 5 minutes.
They don't. By definition, a tornado must be in contact with the ground.
The tornado is reported to have had a path length of 27 miles and an average forward speed of 35 mph, which works out to a duration of 46 minutes.
It varies widely. The average tornado is on the ground for about 8 kilometers. But some tornadoes are only on the ground for a few meters. At the other end, other tornadoes have had damage paths hundreds of kilometers long. The longest tornado damage path on record is 352 kilometers.
The average tornado lasts about 10 minutes. However, duration can vary greatly. Some tornadoes last only a few seconds. In rare cases a tornado can be on the ground for an hour of more. The infamous Tri-State tornado of 1925 is believed to have been on the ground for over three and a half hours.
The average tornado lasts 10 minutes. But they can last anywhere from just a few seconds to over three hours.
until the tornado ends and then the people fall and die or get injured
A "double tornado" is scientifically known as a multiple vortex or multivortex tornado. In such tornadoes smaller vortices form within the main vortex of the tornado. These subvortices usually do not last long and individually do not impact the overall tornado very much. Rather than indicating a lack of organization in the tornado, a multivortex structure usually indicates a strong tornado.
Yes so long as you stay in it.
You would want to go to an under ground celer where the tornado can't reach.
Generally yes except perhaps in the very strongest of storms.
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