Image D-1: 02Z 27 APR 2017 Surface Plot (source: weather.rap.ucar.edu)
Image D-2: 0208Z 27 APR 2017 National Radar (source: NWS)
Image D-3: 0215Z 27 APR 2017 Water Vapor Satellite Image (source: weather.rap.ucar.edu)
This exercise has multiple boundaries. Can you find them?