There were 14 convective periods for August 1999:
Start: 01/17Z End: 02/00Z Flow Regime: Other   radar/wind loop
Start: 02/19Z End: 03/01Z Flow Regime: NE      radar/wind loop
Start: 03/18Z End: 04/07Z Flow Regime: NW      radar/wind loop
Start: 04/15Z End: 05/01Z Flow Regime: SW-2    radar/wind loop
Start: 05/17Z End: 05/23Z Flow Regime: SW-2    radar/wind loop
Start: 07/21Z End: 08/02Z Flow Regime: SW-2    radar/wind loop
Start: 08/23Z End: 09/04Z Flow Regime: SW-2    radar/wind loop
Start: 09/18Z End: 09/21Z Flow Regime: SW-2    radar/wind loop
Start: 10/19Z End: 10/21Z Flow Regime: SW-1    radar/wind loop
Start: 11/15Z End: 11/17Z Flow Regime: SW-2    radar/wind loop
Start: 17/14Z End: 17/20Z Flow Regime: NE      radar/wind loop
Start: 19/16Z End: 19/22Z Flow Regime: SW-2    radar/wind loop
Start: 20/15Z End: 21/00Z Flow Regime: SE-1    radar/wind loop
Start: 21/17Z End: 22/00Z Flow Regime: SW-2    radar/wind loop
 
Start: 01/17Z End: 02/00Z Flow Regime: Other   radar/wind loop
 First peak wind >= 20 knots at 011820Z   Last at 012345Z
 First peak wind >= 35 knots at 012055Z   Last at 012100Z
 No peak winds >= 50 knots were reported
 Max peak wind reported was 46 knots from 326 degrees for tower 0300 at 054 feet on 012055Z
 
Start: 02/19Z End: 03/01Z Flow Regime: NE      radar/wind loop
 First peak wind >= 20 knots at 022050Z   Last at 030035Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 31 knots from 263 degrees for tower 0421 at 054 feet on 022255Z
 
Start: 03/18Z End: 04/07Z Flow Regime: NW      radar/wind loop
 First peak wind >= 20 knots at 031920Z   Last at 040510Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 22 knots from 259 degrees for tower 0021 at 145 feet on 040445Z
 
Start: 04/15Z End: 05/01Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 041825Z   Last at 042345Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 29 knots from 275 degrees for tower 0061 at 204 feet on 042005Z
 
Start: 05/17Z End: 05/23Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 051920Z   Last at 052250Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 25 knots from 204 degrees for tower 1007 at 054 feet on 052210Z
 
Start: 07/21Z End: 08/02Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 072100Z   Last at 080115Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 28 knots from 306 degrees for tower 3131 at 295 feet on 080025Z
 
Start: 08/23Z End: 09/04Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 082300Z   Last at 090300Z
 First peak wind >= 35 knots at 090030Z   Last at 090110Z
 No peak winds >= 50 knots were reported
 Max peak wind reported was 39 knots from 311 degrees for tower 1101 at 162 feet on 090110Z
 
Start: 09/18Z End: 09/21Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 091830Z   Last at 092040Z
 First peak wind >= 35 knots at 091900Z   Last at 091945Z
 No peak winds >= 50 knots were reported
 Max peak wind reported was 38 knots from 263 degrees for tower 0403 at 054 feet on 091945Z
 
Start: 10/19Z End: 10/21Z Flow Regime: SW-1    radar/wind loop
 First peak wind >= 20 knots at 101915Z   Last at 102045Z
 First peak wind >= 35 knots at 101935Z   Last at 102025Z
 First peak wind >= 50 knots at 102010Z   Last at 102015Z
 Max peak wind reported was 50 knots from 230 degrees for tower 0019 at 054 feet on 102010Z
 
Start: 11/15Z End: 11/17Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 111540Z   Last at 111700Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 34 knots from 277 degrees for tower 3131 at 295 feet on 111600Z
 
Start: 17/14Z End: 17/20Z Flow Regime: NE      radar/wind loop
 First peak wind >= 20 knots at 171650Z   Last at 171900Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 22 knots from 282 degrees for tower 0300 at 054 feet on 171825Z
 
Start: 19/16Z End: 19/22Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 191835Z   Last at 192200Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 29 knots from 102 degrees for tower 1612 at 054 feet on 191910Z
 
Start: 20/15Z End: 21/00Z Flow Regime: SE-1    radar/wind loop
 First peak wind >= 20 knots at 201920Z   Last at 202235Z
 First peak wind >= 35 knots at 201955Z   Last at 202140Z
 First peak wind >= 50 knots at 201955Z   Last at 201955Z
 Max peak wind reported was 57 knots from 310 degrees for tower 0300 at 054 feet on 201955Z
 
Start: 21/17Z End: 22/00Z Flow Regime: SW-2    radar/wind loop
 First peak wind >= 20 knots at 212055Z   Last at 212355Z
 No peak winds >= 35 knots were reported
 No peak winds >= 50 knots were reported
 Max peak wind reported was 31 knots from 201 degrees for tower 0019 at 054 feet on 212255Z