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New research links cloud top appearance to lightning during a snowstorm.
• 7 min read
What is thundersnow?
Thundersnow is a rare winter storm event that occurs when thunder and lightning happen during a snowstorm.William Andrew/Getty Images, FILE
On Valentine s weekend in 2015, winter storm Neptune pummeled Boston. Weather Channel meteorologist Jim Cantore was outside reporting on the blizzard when a sudden purple flash illuminated the sky. Oh yes! We got it baby! he yelled, repeatedly leaping in the air. The it was thundersnow the relatively rare, sometimes unnerving, sometimes thrilling appearance of lightning and thunder during a snowstorm.