National Information Management and Support System – …

Ten centimeters (4 inches) of snow cover has been reported to be enough to maintain soil surface temperatures near 32o F. In the winter of 2013-2014, the minimum temperature recorded at each trial with less than 4 inches of snow on the ground was Maine (-5o F), New Hampshire (4o F), Pennsylvania (-9o F), and Vermont (-2o F). ................
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