At approximately 900pm CST , May 20, 2013 — Clarksville Tennessee experienced a RADAR pulse / Scalar Square event.
Seen in this video here:
Move forward almost 24 hours, 700pm CST May 21, 2013 — Clarksville Tennessee and the nearby surrounding area — is the ONLY area to receive a Severe Thunderstorm Warning by the NWS along with damaging winds, and hail.
Update : 1020pm CST May 21, 2013:
Possible tornado over Nashville, TN — also NWS issues severe thunderstorm warning for Nashville directly. Damaging winds and hail detected.
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 :