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Severe weather across the Deep South and Mid-South

By Scott Bachmeier •

GOES-16 “Red” Visible (0.64 µm) images, with time-matched SPC Storm Reports plotted in red [click to play animation | MP4]

GOES-16 “Red” Visible (0.64 µm) images, with time-matched SPC Storm Reports plotted in red [click to play animation | MP4]

1-minute Mesoscale Domain Sector GOES-16 “Red” Visible (0.64 µm) images (above) and “Clean” Infrared Window (10.35 µm) images (below) include time-matched plots of SPC Storm Reports that were produced by a number of supercell thunderstorms that developed and moved across the Deep South and Mid-South on 25 March 2021. The highest concentration of tornadoes occurred in Alabama, including one that was responsible for multiple fatalities in Ohatchee around 1842 UTC.

GOES-16 “Clean” Infrared Window (10.35 µm) images, with time-matched SPC Storm Reports plotted in cyan [click to play animation | MP4]

GOES-16 “Clean” Infrared Window (10.35 µm) images, with time-matched SPC Storm Reports plotted in cyan [click to play animation | MP4]

In a time-matched comparison of Infrared images from Suomi NPP (overpass times) and GOES-16 at 1831 UTC (below), the coldest overshooting top infrared brightness temperature sensed by the VIIRS instrument on Suomi NPP was -78ºC, compared to -72ºC by the ABI  instrument on GOES-16. Note the small northward parallax displacement that is inherent with GOES-16 imagery over that region. The same color enhancement is applied to both images.

GOES-16 “Clean” Infrared Window (10.35 µm) and Suomi NPP VIIRS Infrared Window (11.45 µm) images at 1921 UTC [click to enlarge]

GOES-16 “Clean” Infrared Window (10.35 µm) and Suomi NPP VIIRS Infrared Window (11.45 µm) images at 1831 UTC [click to enlarge]

Categories: GOES-16, Severe convection, Suomi NPP, VIIRS