Published September 13, 2011, 12:00 AM
Weather Talk: Average first frost date not really all that useful
Cool air masses from up north start dropping into our region with increasing regularity in August, September and October. Eventually, one of these taps into a chunk of very chilly air and puts it right over us on a night with a clear sky and light winds and we end up with frost and rotten tomatoes.By: John Wheeler, WDAY, INFORUM
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