Q: Is there energy in snow?

A: Snow is a form of solid water, and water is the only substance that occurs naturally in all three phases — solid, liquid and invisible gas — in the Earth’s atmosphere. Of course, that means that an accumulation of snow began as the equivalent amount of water in the invisible vapor (gas) phase before it was transformed into solid water.

Winter weather

A woman walks with skis in the snow in Sioux City, Iowa, as a winter storm blows through the area. (AP Photo/Nati Harnik)

"Weather Guys" Steve Ackerman and Jonathan Martin are professors in the University of Wisconsin-Madison department of atmospheric and oceanic sciences.

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