Have you ever heard thunder during a big snowstorm? If so, you've experienced an (extreme) rare weather occurrence.
The things necessary for thundersnow are so uncommon it's reported that only 0.07 percent of snowstorms (link) with thunder. This explains the excited (react) from the witness to a recent thundersnow
Thundersnow-when thunder and lightning occur during a snowstorm-is most likely (happen) during late winter or early spring when a mass of cold air meets warm air near the ground.
Patrick Market from University of Missouri, says that heavy snowfall is common during thundersnow. In a 30-year study of snowstorms (concern) lightning. Market found that there's an 86 percent chance that at least 6 inches of snow will accumulate within a 70-mile radius(半径)of the lightning. He says (witness) thundersnow is a matter of being in the right place the right time, but even then, you likely won't see much.
Thundersnow is most common in the Midwest, the Great Lakes and along coasts moisture(水汽) from warm water can easily evaporate(蒸发) into the colder, drier air above. Some of the places that most frequently report the rare weather event (be) Wolf Creek Pass, Colorado; Bozeman, Montana; and the shores of Lake Ontario.
