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satellite image: Contiguous U.S., 1-12-2011
January 12, 2011:
Above: Snow Extent from STAR Automated Snow Map, 1-12-2011
Below: Southeast U.S. Enlargement
map: Snow Extent from STAR Automated Snow Mapping, 1-12-2011

STAR Measures Unusually Widespread Snow Cover in the Contiguous U.S.

21 January 2011 - Extensive snowfalls in Eurasia and in North America brought the snow extent to near-record levels on both continents early in 2011. On January 12, 2011 the snow extent in North America reached 18.4 million square km and thus exceeded the long-term average for the month of January by 1.4 million square km - an area nearly twice the size of the state of Texas. On that day, at least some snow cover on the ground was observed in 47 out of 48 contiguous United States.

Dr. Peter Romanov developed and maintains STAR's Automated Snow Mapping algorithms and website. The automated snow mapping system is based on a synergy of METOP AVHRR, GOES Imager, MSG SEVIRI and DMSP SSMIS data and produces daily global snow cover maps. Thanks to Dr. Romanov of STAR and to the NOAA Environmental Visualization Lab for providing these images and analysis.

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