The reason we can see tornadoes is that the low pressure within that column condenses moisture in the air, producing a funnel cloud. A tornado itself is a rotating column of wind, and it’s the wind that matters. Some small tornadoes can produce scale-topping winds, while some big tornadoes are more bark than bite and leave only minor damage-to barns or farm equipment, for example-in their wake.
You shouldn’t judge a tornado solely by its size.
Many of the tragic tornadoes we’ve seen in recent history caused the amount of damage they did not just because they were intense, but because they covered so much land. Unfortunately, when a tornado covers so much ground, it’s more likely to hit populated areas. A recent tornado in Wisconsin tracked along a path more than 80 miles long. Many of these unusually wide storms can stay on the ground for dozens of miles, sometimes traversing several states before finally dissipating. Large tornadoes typically have long tracks. THEY CAN STAY ON THE GROUND FOR A LONG TIME. Scientists are still studying why some supercells produce tornadoes and others don’t, but a well-defined hook echo is usually a bad sign that things could get ugly in a hurry. This hook echo is ominously visible on radar imagery and a stunning sight in person. Tornadoes usually form in the “hook echo” of a supercell, which is the point where winds wrapping around the storm meet with the updraft racing skyward into the storm. THE HOOK BRINGS YOU BACK.Ī radar image of the supercell that produced a mile-wide F5 tornado near Oklahoma City on May 3, 1999. This extra boost gives supercells the ability to produce hail the size of baseballs or larger, intense winds, and enormous tornadoes. This rotating updraft helps the storm become strong and resilient. A supercell is a thunderstorm with a rotating updraft. The largest tornadoes require immense thunderstorms called supercells in order to form. The average tornado is only a few hundred feet wide, but some can be as narrow as a single vehicle or as wide as a mile or more across. HUGE TORNADOES REQUIRE HUGE THUNDERSTORMS. The largest tornadoes are in a category all their own as some of the scariest weather conditions nature can create. Most of these twisters are small and only last a couple of minutes, but a small percentage of them can grow enormous and last for many hours, sometimes tearing a path across entire states. The United States is home to the majority of all the tornadoes that touch down around the world every year. Tornadoes, it turns out, are about as American as apple pie.
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