nickgrillo
EF5
Thunderstorms are now developing ahead of the rapidly progressing cold front stretched from the surface low in northern IL back through MO and into OK. Substantial insolation / convective mixing in the pre-convective airmass has allowed the moist boundary layer to develop upward and diabatically destabilize with surface-based CAPE of at least 250 J/kg (per SPC mesoanalysis) ahead of the cold front (and will continue to increase through the afternoon).
Kurt Hulst, are you out there?
Kurt Hulst, are you out there?