Radar mosaic showing a strong frontal system with huge bow echoes extending
across the center of the United States.
Image ID: wea04431, NOAA's National Weather Service (NWS) Collection
Photo Date: 2011 April 19 8:58 P.M.
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
NOAA Central Library
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April 30, 2013