Add Yahoo as a preferred source to see more of our stories on Google. Photo Credit: Reddit A dramatic photo of a shelf cloud rolling across the sky ahead of a thunderstorm is stunning Reddit users — ...

The sight of an eerie green sky before a fierce thunderstorm is sometimes perceived as a warning sign of an approaching tornado, but forecasters say that this long-standing myth might not be true.

Weather apps have gotten remarkably good. Most of them pull radar data refreshed every few minutes and push alerts before the first rumble of thunder. Still, there's a gap between what your phone ...