Supercell thunderstorms produce tornadoes, large hail and damaging winds across northern/central Illinois and northwest Indiana
1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Visible and Infrared Window images (above) included time-matched plots of SPC Storm Reports — which showed supercell thunderstorms that produced several tornadoes, hail as large as 2.50″ in diameter and wind gusts as high as 85 mph across parts of northern/central Illinois and far northwestern Indiana on 11 June 2026. Initial storm surveys have found EF3 damage in Streator, Illinois and Kouts, Indiana.
1-minute GOES-19 Visible and Infrared Window images that included plots of GLM Flash Points (below) highlighted the abundant lightning activity associated with these thunderstorms.
Plots of rawinsonde data from Lincoln, Illinois (location) at 1800 UTC and 2100 UTC (below) displayed a marked increase in the atmosphere’s instability and shear parameters during that 3-hour period.
