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Photo by Deb Wessler

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KTNA On Air Studio, Jan 2013

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Winter Black-capped Chickadee

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photo: Robin Song


Cold October, low snowfall mean deep frost in South Central

by admin default ~ November 9th, 2012

The National Weather Service announced on Friday that the frost depths in South Central are above average, after a long winter season with low snowfalls prior to the recent storm system this week.

According to the National Weather Service Alaska Region’s Facebook Page:

[I]n the four years of data for our site in Midtown Anchorage, this is by far the deepest early season frost. A combination of colder than normal temperatures and lack of snow have caused a significantly deeper frost depth for this time of year. Snow typically slows the growth of the frost layer by insulating the ground from the colder air.

Based on Air Temperature plots, the weather has been colder than the 30-year average since mid-October.

Last winter, the maximum frost depth was 15.60 inches, observed on April 2, 2012.

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