In about 15 minutes, Tempe recorded nearly three-quarters of an inch of rain. A supercell thunderstorm forms when wind speed and direction change with height, a phenomenon called wind shear.

Editor's note: This article has updated the status of weather alerts for Berkshire County. If you were planning outdoor activities in the Berkshires on Saturday, you likely had to reschedule. That's ...

Australia's storm season shifts into top gear, and the next 72 hours will deliver a combination of rain, showers or ...