The first of tomorrow scattered rainfall will reach the Tri-State's southernmost reaches between 9AM and 10AM Wednesday. From there, it will stretch north toward Evansville by 11AM before enveloping the reminder of the Tri-State by 12PM. Expect periodic scattered shower and thunderstorm activity to affect the Ohio Valley though the remainder of our Wednesday. The Threat of Severe Weather however, will hold off until at least 5PM.
A secondary cluster of shower and thunderstorm development will reach our southwesternmost communities around tomorrow evening's commute. The cluster will likely gain strength as it migrates northeastward, reaching Evansville between 6PM and 7PM - It's this secondary round of showers and storms that will likely produce the Severe Weather threat we've talked aboiut so much in recent days. Currently, it appears as though damaging straight-line winds in excess of 50 or 60 mph and quarter-sized hail will be the greatest threats to the Tri-State Wednesday evening.
That being said, the greatest threat for Severe Weather won't likely subside until 12AM Thursday morning - there is a chance (small as it may be) that portions of the Tri-State, especially those south of the Ohio, may see periods of brief or broad rotation embedded within some of those thunderstorms Wednesday night. Obviously Wednesday will be quite the active day and certainly warrants a watchful eye. Storm Team 44 will continue to monitor the situation as it continues to evolve.