Icicles

Icicles typically form on days when the outdoor air temperature is below freezing but sunshine warms and melts snow or ice.

Q: Why are icicles shaped like long skinny carrots?

A: Icicles typically form on days when the outdoor air temperature is below freezing but sunshine warms and melts snow or ice.

Thus, you may notice that more icicles form on the sunny south-facing side of your home than on the shaded north side.

"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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