This NOAA satellite image taken Sunday, Feb. 10, 2013 at 2:00 a.m. 

This NOAA satellite image taken Sunday, Feb. 10, 2013 at 2:00 a.m. EST shows a developing storm system entering the Plains States with rain and thunderstorms in the Central and Southern Plains and snow in the Northern Plains and portions of the Rocky Mountains. (AP Photo/Weather Underground)
Associated Press
This NOAA satellite image taken Sunday, Feb. 10, 2013 at 2:00 a.m. EST shows a developing storm system entering the Plains States with rain and thunderstorms in the Central and Southern Plains and snow in the Northern Plains and portions of the Rocky Mountains. (AP Photo/Weather Underground)
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