There were 8 convective periods for May 1997:
Start: 03/16Z End: 04/05Z Flow Regime: SW-2    radar/wind loop
Start: 19/15Z End: 19/20Z Flow Regime: SW-2    radar/wind loop
Start: 21/17Z End: 22/03Z Flow Regime: NW      radar/wind loop
Start: 26/00Z End: 26/03Z Flow Regime: SE-1    radar/wind loop
Start: 26/17Z End: 26/22Z Flow Regime: SW-2    radar/wind loop
Start: 27/23Z End: 28/04Z Flow Regime: NW      radar/wind loop
Start: 28/15Z End: 28/22Z Flow Regime: NW      radar/wind loop
Start: 31/16Z End: 31/23Z Flow Regime: SE-1    radar/wind loop
 
Start: 03/16Z End: 04/05Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 031600Z   Last at 040355Z
 First peak wind >= 35 knots at 031955Z   Last at 032110Z
 First peak wind >= 50 knots at 032025Z   Last at 032025Z
 Max peak wind reported was 64 knots from 207 degrees for tower 0421 at 054 feet on 032025Z
 
Start: 19/15Z End: 19/20Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 191840Z   Last at 191840Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 20 knots from 162 degrees for tower 1612 at 054 feet on 191840Z
 
Start: 21/17Z End: 22/03Z Flow Regime: NW      radar/wind loop
 First peak wind >= 20 knots at 212115Z   Last at 212140Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 20 knots from 330 degrees for tower 1012 at 054 feet on 212115Z
 
Start: 26/00Z End: 26/03Z Flow Regime: SE-1    radar/wind loop
 First peak wind >= 20 knots at 260000Z   Last at 260155Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 23 knots from 159 degrees for tower 3131 at 295 feet on 260010Z
 
Start: 26/17Z End: 26/22Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 261705Z   Last at 262120Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 22 knots from 015 degrees for tower 1007 at 054 feet on 262100Z
 
Start: 27/23Z End: 28/04Z Flow Regime: NW      radar/wind loop
 First peak wind >= 20 knots at 272330Z   Last at 280330Z
 First peak wind >= 35 knots at 280025Z   Last at 280030Z
 First peak wind >= 50 knots at 280025Z   Last at 280030Z
 Max peak wind reported was 56 knots from 315 degrees for tower 0300 at 054 feet on 280025Z
 
Start: 28/15Z End: 28/22Z Flow Regime: NW      radar/wind loop
 First peak wind >= 20 knots at 281510Z   Last at 282200Z
 First peak wind >= 35 knots at 281525Z   Last at 281525Z
 No peak winds >= 50 knots were reported
 Max peak wind reported was 36 knots from 054 degrees for tower 0003 at 054 feet on 281525Z
 
Start: 31/16Z End: 31/23Z Flow Regime: SE-1    radar/wind loop
 First peak wind >= 20 knots at 312115Z   Last at 312210Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 34 knots from 234 degrees for tower 0509 at 054 feet on 312155Z