By Joe Berkemeier and Steve Wittich Barber Motorsports Park experienced a decent thunderstorm this afternoon that stopped the PWC race early and caused Pro Mazda qualifying to be delayed. Verizon IndyCar practice will now start at 3:20pm local time (4:20pm Eastern) and run until 4:35 (5:35 Eastern). The USF2000 race and second Indy Lights practice…