There are areas of unstable snow in several locations near the top of Yr Wyddfa, said the Llanberis Mountain Rescue Team.

Thunder and lightning aren't just for summer storms. In the winter, intense bands of snow can include the rare phenomenon known as thundersnow.

Thundersnow that happens when thunder and lightning occur during snowfall. The rare weather event can be helpful for predicting a larger storm. Less than one percent of all snowstorms are associated ...

Thundersnow is possible, but it is pretty rare. The reason has to do with the conditions needed for lightning to form in a ...

A heavy band of lake-effect snow on New Year’s Eve produced thundersnow and snow lightning across western New York.

(WLUK) -- Thundersnow, a rare and powerful winter weather event, could make an appearance in Northeast Wisconsin as Winter Storm Cooper approaches. This phenomenon forms similarly to a regular ...

Two winter systems are coming together across the northern U.S. this week, bringing the potential for heavy snow and strong winds across the Great Lakes and Upper Midwest.

Storm Goretti brought thundersnow to south-west Wales, with this flash caught in Crymych.