[Ans] What is thundersnow? Thunder and lightning during a snowstorm,Snowfall so heavy it makes booming noise , Snowfall during a thunderstorm , Sound an avalanche makes

Step 1 : Introduction to the question "What is thundersnow?"

Thundersnow, also known as a winter thunderstorm or a thundersnowstorm, is an unusual kind of thunderstorm with snow falling as the primary precipitation instead of rain. It typically falls in regions of strong upward motion within the cold sector of an extratropical cyclone.

Step 2 : Answer to the question "What is thundersnow?"

Thunder and lightning during a snowstorm:

Thundersnow is the occurrence of thunder and lightning during a snowstorm. It is one of Mother Nature's rarest of events. A mass of cold air meeting up with warm, moist air lurking near the ground is the cause. It is usually associated with a heavy snowfall; in fact, studies show that lightning during a snowstorm usually heralds an 86 percent chance of at least 6 inches of snow within a 70-mile radius. Source: MNN.com

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