Article: WHY THUNDERSTORMS OCCUR IN THE WINTER.(LOCAL)(CURIOSITIES)(Column)

Q. How can you have a forecast with both snow showers and thunderstorms on the same day?

A. The weather conditions that lead to thunderstorms can occur any time of year. When updrafts draw warm, moist air a mile or more above the ground, the moisture condenses and falls as precipitation. Whether that precipitation falls as rain or snow depends on the air temperature nearer the surface.

"It's more likely that you're going to get the conditions that lead to a thunderstorm - whether it's snow or rain - when the air is warmer and, therefore, more moisture-laden," said Jonathan Martin, chairman of the department of ...

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