There were 6 convective periods for May 2011:
Start: 06/17Z End: 06/21Z Flow Regime: SW-2    radar/wind loop
Start: 14/00Z End: 14/02Z Flow Regime: SW-2    radar/wind loop
Start: 14/18Z End: 15/00Z Flow Regime: SW-2    radar/wind loop
Start: 15/10Z End: 15/12Z Flow Regime: SW-1    radar/wind loop
Start: 27/16Z End: 27/21Z Flow Regime: SW-2    radar/wind loop
Start: 31/00Z End: 31/02Z Flow Regime: NE      radar/wind loop
 
Start: 06/17Z End: 06/21Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 061700Z   Last at 062100Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 27 knots from 185 degrees for tower 0421 at 054 feet on 061825Z
 
Start: 14/00Z End: 14/02Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 140000Z   Last at 140110Z
 First peak wind >= 35 knots at 140015Z   Last at 140035Z
 No peak winds >= 50 knots were reported
 Max peak wind reported was 39 knots from 219 degrees for tower 0421 at 054 feet on 140035Z
 
Start: 14/18Z End: 15/00Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 141800Z   Last at 141910Z
 First peak wind >= 35 knots at 141900Z   Last at 141910Z
 No peak winds >= 50 knots were reported
 Max peak wind reported was 40 knots from 214 degrees for tower 0506 at 054 feet on 141910Z
 
Start: 15/10Z End: 15/12Z Flow Regime: SW-1    radar/wind loop
 First peak wind >= 20 knots at 151000Z   Last at 151200Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 25 knots from 209 degrees for tower 1102 at 204 feet on 151000Z
 
Start: 27/16Z End: 27/21Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 271800Z   Last at 272005Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 27 knots from 167 degrees for tower 1612 at 054 feet on 271910Z
 
Start: 31/00Z End: 31/02Z Flow Regime: NE      radar/wind loop
 First peak wind >= 20 knots at 310105Z   Last at 310155Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 26 knots from 065 degrees for tower 0061 at 204 feet on 310105Z