![\"Suomi](\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2017\/06\/170611_0734utc_suomi_npp_viirs_dnb_infrared_SD_mcs_anim.gif\")
<\/a>Suomi NPP VIIRS Day\/Night Band (0.7 \u00b5m) and Infrared Window (11.45 \u00b5m) images, with SPC storm reports of hail and wind damage [click to enlarge]<\/p><\/div>A large Mesoscale Convective System (MCS) developed and intensified over western South Dakota during the nighttime hours of 10 June<\/strong><\/a> – 11 June 2017<\/strong><\/a>, evolving into a bow echo that spread a swath of hail and strong winds from central\/eastern South Dakota across Minnesota and into Wisconsin and Michigan (SPC storm reports: 10 June<\/strong><\/a> | 11 June<\/strong><\/a>). Image toggles between Suomi NPP VIIRS Day\/Night Band (0.7 \u00b5m) and Infrared Window (11.45 \u00b5m) at 0734 UTC or 2:34 am Central Time (above)<\/strong><\/em> and 0916 UTC or 4:16 am Central Time (below)<\/strong><\/em> showed numerous well-defined overshooting tops and cloud-top gravity waves over South Dakota. The coldest cloud-top infrared brightness temperature on the 0916 UTC image was -88\u00ba C (dark<\/em> violet color enhancement).<\/em> Since the Moon was in the Waning Gibbous phase (at 97% of Full), its ample illumination provided vivid examples of the “visible image at night” capability of the Day\/Night Band; several bright white “lightning streaks” were also evident, a signature of cloud top illumination by intense lightning activity.<\/p>\n Suomi NPP VIIRS Day\/Night Band (0.7 \u00b5m) and Infrared Window (11.45 \u00b5m) images, with SPC storm reports of hail and wind damage [click to enlarge]<\/p><\/div>During the subsequent daytime hours of 11 June, GOES-16 Visible (0.64 \u00b5m<\/strong><\/a>) and Infrared Window (10.3 \u00b5m<\/strong><\/a>) images (below)<\/strong><\/em> showed the eastward\u00a0 progression of the MCS across Minnesota into western Wisconsin.<\/p>\n<\/a>