Late PM of May 15, 2013 , going into early AM of May 16, 2013 — a series of RADAR pulses / “HAARP rings” / Scalar Squares occurred in Nebraska, and Iowa.
seen in this video here:
Move forward approximately 17 hours, severe weather develops over the pulsed epicenters, Hail, Damaging winds, Severe thunderstorms warnings issued inside the pulsed circumferences.
Here are several posts explaining the basics behind the theory of radio frequency modification of the weather, more specifically an explanation on how I believe RADAR is playing a role :
Past RADAR pulse / HAARP ring / Scalar Square confirmations :