Best track information for SIO 2008 200810 HELEN
      Date&time      longitude       latitude  Min SLP (hPa)   Vmax (knots)
     2007123018         134.40         -14.60         1004.0           25.0
     2007123100         134.80         -14.90         1004.0           25.0
     2007123106         135.00         -15.20         1004.0           25.0
     2007123112         135.00         -15.60         1004.0           25.0
     2007123118         134.70         -15.90         1004.0           25.0
     2008010100         134.30         -16.00         1007.0           20.0
     2008010106         133.80         -16.00         1007.0           20.0
     2008010112         132.90         -15.70         1007.0           20.0
     2008010118         131.90         -15.30         1007.0           20.0
     2008010200         130.90         -14.90          996.0           20.0
     2008010206         130.00         -14.40          996.0           20.0
     2008010212         129.20         -14.10          996.0           25.0
     2008010218         128.60         -14.10         1004.0           25.0
     2008010300         128.00         -14.20         1004.0           25.0
     2008010306         127.90         -14.20         1000.0           30.0
     2008010312         127.80         -14.20          996.0           35.0
     2008010318         127.70         -14.00          994.0           35.0
     2008010400         128.10         -13.40          996.0           35.0
     2008010406         128.90         -13.20          985.0           45.0
     2008010412         129.80         -13.20          985.0           50.0
     2008010418         130.90         -13.20          989.0           45.0
     2008010500         132.10         -13.30          993.0           40.0
     2008010506         133.40         -13.40         1000.0           30.0
     2008010512         135.00         -13.60         1000.0           30.0
     2008010518         136.60         -13.80         1000.0           30.0
     2008010600         138.40         -14.00         1000.0           30.0
     2008010606         140.30         -14.20         1000.0           30.0
     2008010612         141.40         -14.30         1004.0           25.0
     2008010618         142.00         -14.40         1004.0           25.0
     2008010700         142.60         -14.60         1007.0           20.0
     2008010706         143.40         -14.90         1007.0           20.0