Severe thunderstorms in Indiana and Ohio

May 27th, 2019 |

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

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

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) images (above) revealed supercell thunderstorms that developed within the warm sector of a midlatitude cyclone approaching from the Upper Midwest (surface analyses) — these thunderstorms produced a variety of severe weather (SPC Storm Reports | NWS Northern Indiana) across Indiana late in the day on 27 May 2019.

Many of these storms exhibited well-defined overshooting tops; the largest hail was 4.0 inches in diameter at 0000 UTC. A comparison of SPC Storm Reports at the time of this large hail (and a nearby wind gust to 72 mph) — plotting the reports at the actual ground location vs a “parallax-corrected” location which shifted them northwestward — showed that the severe report locations closely corresponded to the overshooting top (below).

GOES-16 “Red” Visible (0.64 µm) images, with SPC Storm Reports plotted in red [click to enlarge]

GOES-16 “Red” Visible (0.64 µm) image at 0000 UTC, with SPC Storm Reports plotted in red [click to enlarge]

The corresponding GOES-16 “Clean” Infrared Window (10.35 µm) images (below) showed that many of the overshooting tops had infrared brightness temperatures in the -70 to -75ºC range.

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

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

As the thunderstorms moved eastward across Ohio, they continued to produce all modes of severe weather (including EF-3 and EF-4 tornadoes in the Dayton area beginning around 0258 UTC). Additional information on these storms is available from the Hazardous Weather Testbed.

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

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

A Terra MODIS Infrared Window (11.0 µm) image at 0243 UTC with plots of SPC Storm Reports within +/- 45 minutes of the image time (below) showed cloud-top infrared brightness temperatures as cold as -73ºC.

Terra MODIS Infrared Window (11.0 µm) image with plots of SPC Storm Reports within +/- 45 minutes of the image time [click to enlarge]

Terra MODIS Infrared Window (11.0 µm) image with plots of SPC Storm Reports within +/- 45 minutes of the image time [click to enlarge]