70, 80 per cent of warnings don't actually come before a tornado. Forecasters are just really bad at this. So what do scientists know about how tornadoes form? I talke to robin tana machi,. She's a meteorologist at pedu university in indiana and she knows everything there is to know about tornadoes. He unfortunately, i've been watching ta tornado instead of where i'm goneher lots of questions. Tomaand i believe that this explains that a helicopter pilot is realizing woe. We've got a live tornado on our hands. And so there.