The most important things for a tornado to form is temperature, humidity, wind direction and speed. To get that complete data set all around the tornado at all the different levels is very difficult. It's difficult to get this complete data set because tornadoes don't stay on the ground for a long period of time.
8 minutes, 24 seconds. That’s the average amount of warning time people get before a tornado touches down. To do better, and to understand tornadoes, scientists need to confront more of these storms, head on.
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