May 2013 was a weird pattern -- it has been a while since a potential classic setup comes along in peak season, which certainly seems possible given the looks.
Nino spring/summers seem to have a tendency to go bigger in middle or late season at least the few I've looked at. Think when you put that plus the signs of prior as far as KS/panhandle type targets.. outlook is quite positive for the season as a whole. I guess it'll shut down at some point but the main story has been an active pattern for quite a while.. severe ramped up in late Mar and never fully died off till recently, and even that die off was relatively tame for early season. Some of those April events would have been more memorable if there was just a little bit more surface moisture.