Severe weather outbreak across the central US1-minute Mesoscale Domain Sector GOES- 16 (GOES-East) “Red” Visible (0.64 µm) images (above) showed widespread events of severe weather (SPC Storm Reports) associated with a large occluding low pressure system and its frontal boundaries on 28 March 2020.
The corresponding GOES-16 “Clean” Infrared Window (10.35 µm) images are shown below. The coldest cloud-top infrared brightness temperatures were in the -60 to -70ºC range (red to black enhancement). The most significant tornado produced EF-3 damage as it moved through Jonesboro, Arkansas beginning at 2157 UTC.A toggle between a Suomi NPP VIIRS Visible (0.64 µm) image (with plots of available NUCAPS soundings) and the Gridded NUCAPS CAPE values (below) revealed pockets of instability across the lower Mississippi River Valley in advance of the approaching cold front. Due to the presence of dense multi-layer cloudiness across much of Arkansas, there were no successful infrared+microwave (green) NUCAPS profiles available near Jonesboro (KJBR), except for a few microwave-only (yellow) soundings just to the south. A plot of 19 UTC rawinsonde data from Little Rock, Arkansas (below) indicated a CAPE value of 2836 J/kg. Additional imagery of this event is available on the Satellite Liaison Blog.