I love it when they openly admit that even with everything at their disposal, they have no idea what's happening or why:
"Early this morning, isolated shower and thunderstorm activity
stubbornly persisted in a band from north of Perryville MO to the
Rend Lake area in southern Illinois, with a few cells observed in
southwest Indiana within the past couple hours as well. As best as
we can tell, the activity was likely a result of a combination of
weak mid level energy approaching from the northwest and a remnant
outflow boundary that drifted northward from evening convection.
No model seems to have a good handle on the ongoing activity, so
any forecast is a wild guess. Thinking the current activity should
diminish through daybreak, but with the presence of the boundary
and weak energy, other isolated activity could fire to its south."