From KIND
There will be a severe threat with this convection late Thursday
evening into Thursday night. The moderate WAA will keep the
thermodynamic environment fairly conducive for longer. CAPE values
around 1000 J/kg are expected to maintain through around 04Z;
, diurnal cooling will begin to take over, limiting any
SBCAPE. Prior to this, the development of a nocturnal LLJ along with
a deepening surface low will create a fairly conducive environment
for isolated severe thunderstorms. Wind will be the primary threat
as by the time the thunderstorms reach central Indiana they should
be primarily linear. The strengthening LLJ and resulting speed shear
should help induce some RIJs within linear segments.
As diurnal cooling takes over, the thunderstorms will become
elevating reducing the wind threat greatly. This is likely to occur
shortly after the 04-06Z time period. The severe threat for the
entire region will greatly depend on when the thunderstorms reach
central Indiana.