From popcorn storms to supercells, here's how thunderstorms form, turn severe and why some produce hail, damaging winds or tornadoes.

BISMARCK, N.D. (KFYR) - Last week was Severe Weather Awareness week, which covered topics from severe thunderstorms to tornadoes to extreme heat and fire danger. One question that may remain is: How ...

Our thunderstorm chances look to be increasing during the day Thursday as a powerful cold front is set to move through southern Wisconsin and northern Illinois during the afternoon. But the exact ...

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 ...

Instead, three specific hazards determine whether a storm meets the criteria: tornadoes, damaging winds, and hail. Each of ...

Spring has arrived and so has Severe Weather Awareness Week. The First Alert Weather Team wants to make sure you are ready ...

They're much more common than tornadoes. Here's why severe thunderstorms are dangerous and why you should take action when a ...

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 ...