First Frost

Sunday, October 5, 2014, 8:00 AM, Clarksville, MD

First morning in the 30’s brings the first frost since . . .

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Walking out to our chicken coop to release the birds from their (anti-predator) locked pen for the day, I had to walk thru our first frost of the season.  When I went inside to get my camera, I noted that it was 38-degrees at our kitchen window thermometer.

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Our last frost was 160 to 180 days ago, sometime in late March and into mid-April.

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Our first frosts of autumn in central Maryland usually don’t come until the third to last week of October, so this first frost is definitely two to three weeks early.

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Frost is a covering of minute ice crystals, formed from the atmosphere at night upon the ground and exposed objects when they have been cooled by radiation below the dew point.  I bet we don’t get our first hard, killing frost until much later this month.

First Frost Dates for Maryland:  http://www.washingtonpost.com/blogs/capital-weather-gang/post/when-should-the-washington-dc-area-expect-to-see-its-first-freeze-of-the-cold-season/2011/10/19/gIQAbWmZ3L_blog.html

First Snow Dates for Maryland:  http://www.washingtonpost.com/blogs/capital-weather-gang/wp/2014/10/06/what-is-the-average-date-of-the-first-measurable-snow-in-the-d-c-area/

 

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