With summer approaching, the threat of thunderstorms is becoming more likely.

During springtime in Houston, a steamy afternoon can quickly give way to towering cumulonimbus clouds overhead. Often called "popcorn storms," these cells bubble up quickly and fade just as fast. But ...

A week ago, Milwaukee and much of Wisconsin was slammed by severe weather – and more often than not, the storms rolled through late in the day or overnight. That isn't unusual, though, because ...