Best track information for SIO 1997 199809 SELWYN
      Date&time      longitude       latitude  Min SLP (hPa)   Vmax (knots)
     1997122518         111.00         -12.00            0.0           20.0
     1997122600         111.50         -12.10            0.0           25.0
     1997122606         111.90         -12.50            0.0           25.0
     1997122612         111.80         -12.80            0.0           30.0
     1997122618         111.60         -13.30            0.0           30.0
     1997122700         111.10         -13.90            0.0           35.0
     1997122706         110.50         -14.50            0.0           45.0
     1997122712         110.00         -14.90            0.0           65.0
     1997122718         109.40         -15.30            0.0           60.0
     1997122800         108.90         -15.60            0.0           65.0
     1997122806         108.40         -15.90            0.0           65.0
     1997122812         107.80         -16.30            0.0           65.0
     1997122818         107.30         -16.80            0.0           65.0
     1997122900         106.50         -17.10            0.0           65.0
     1997122906         105.60         -17.40            0.0           60.0
     1997122912         104.70         -17.50            0.0           50.0
     1997122918         103.90         -17.40            0.0           45.0
     1997123000         103.00         -17.10            0.0           45.0
     1997123006         102.10         -16.90            0.0           45.0
     1997123012         101.40         -16.60            0.0           40.0
     1997123018         100.70         -16.50            0.0           35.0
     1997123100         100.00         -16.40            0.0           35.0
     1997123106          99.20         -16.30            0.0           35.0
     1997123112          98.20         -16.30            0.0           35.0
     1997123118          97.20         -16.30            0.0           35.0
     1998010100          96.20         -16.40            0.0           30.0
     1998010106          95.20         -16.60            0.0           25.0
     1998010112          94.30         -16.80            0.0           25.0
     1998010118          93.30         -17.30            0.0           30.0
     1998010200          91.90         -17.60            0.0           25.0
     1998010206          90.70         -18.30            0.0           25.0
     1998010212          89.80         -18.90            0.0           25.0
     1998010218          89.00         -19.40            0.0           25.0