IWX aviation update clues into what there thinking
.AVIATION...(For the 06Z TAFS through 06Z Saturday Night)
Issued at 1246 AM EDT Sat Jun 17 2017
Upstream convection from the next system extended from extreme
east IA into far southern WI early this morning. Mentioned VCTS
at SBN 08-12 as some of these storms may be able to make it into
northwest Indiana before they dissipate later this morning.
Mentioned VCTS by late afternoon at both sites as daytime heating
combined with increasing low level theta e convergence may be
enough to trigger a few storms. There will be a much better
chance for storms early tonight, especially over northwest
Indiana as a more substantial system moves into the area.