Severe thunderstorms producing strong winds and large hail in Wyoming, South Dakota, Nebraska and Kansas

June 28th, 2017 |

GOES-16 Infrared Window (10.3 µm) images, with SPC storm reports of wind and hail [click to play MP4 animation]

GOES-16 Infrared Window (10.3 µm) images, with SPC storm reports of wind and hail [click to play MP4 animation]

** GOES-16 data posted on this page are preliminary, non-operational data and are undergoing testing **

Clusters of severe thunderstorms developed over eastern Wyoming and the Nebraska panhandle during the afternoon on 27 June 2017, and increased in areal coverage and intensity as they moved eastward into the overnight hours. 1-minute interval Mesoscale Sector GOES-16 Infrared Window (10.3 µm) images with plots of SPC storm reports (above) showed a number of locations with wind gusts in excess of 60 mph — including 79 mph in Rapid City SD at 2341 UTC and 100 mph in Custer NE at 0200 UTC. Many of these high wind reports were in the general vicinity of thunderstorm overshooting tops, which exhibited cloud-top infrared brightness temperatures in  the -70 to -80º C range (black to white enhancement).

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