Why Is a 30% Chance of Rain Different from a 30% Risk of Tornadoes?
Dennis Mersereau · 07/11/14 01:00PMWhen the forecast calls for a 30% chance of rain, it's reasonable to think that the chances of seeing rain are 3 out of 10. But when the forecast calls for a 30% chance of tornadoes, the risk is much higher and much more dangerous. Why is there such a discrepancy between severe weather and rain forecasts?