A supercell thunderstrom in Oklahoma. Image courtesy of NSSL/NOAA. The National Weather Service defines a severe thunderstorm as a thunderstorm that is producing: Hail that is at least quarter ...

FRIDAY: Expect a mix of sun & clouds with highs well into the 80s, nearing 90 degrees in a few spots. Southerly winds will gust up to 20-30 mph again as well. Outside of a brief shower or two, the ...