They form on very hot and humid days when the air rises so fast that the rising air starts to spin. They rarely touch down and if they do, they will not cause damage.
They are also very rare so if anyone sees one it may be the only time in their life they may do so, Simpson said.
After another hot and humid day with temperatures reaching 90, Tuesday night will be warm and muggy with mostly clear skies and lows in the 70s.
The heat continues into Wednesday and a touch more humidity will have the heat index at around 100 for several hours in the afternoon.
Just like Tuesday, there will be a limited chance of rain with an isolated thunderstorm possible. Highs will be near 90 degrees.
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