How do harmless puffy white clouds grow into towering, potentially dangerous cumulonimbus thunderstorms? On their surface, clouds appear to be an odd contradiction of nature — light enough to float on ...

The rumble of thunderstorms across the country this week is a noisy reminder that summer is arriving—and with it, the mix of heat, humidity and unstable air that fuels these bursts of wild weather.

Severe weather is possible across parts of Texas on Friday afternoon and evening, with the primary threats being large hail, strong winds and heavy rainfall.

Thunderstorms are known to form preferentially on warm, humid days with unstable air. But predicting where exactly a thunderstorm will develop has so far remained extremely difficult. Heavy rainfall ...

Add Yahoo as a preferred source to see more of our stories on Google. A tornado touches down north of Jarrell in Williamson County along Interstate 35 on May 27, 1997. A tornado is a violently ...