Best track information for SIO 2011 201121 ERROL
      Date&time      longitude       latitude  Min SLP (hPa)   Vmax (knots)
     2011041306         125.30         -12.50         1010.0           15.0
     2011041312         125.60         -12.40         1007.0           20.0
     2011041318         125.80         -12.40         1004.0           25.0
     2011041400         125.90         -12.50         1000.0           30.0
     2011041406         126.10         -12.50         1000.0           30.0
     2011041412         126.20         -12.80         1000.0           30.0
     2011041418         126.20         -13.10          996.0           35.0
     2011041500         126.10         -12.90          993.0           40.0
     2011041506         126.00         -12.70          993.0           40.0
     2011041512         125.80         -12.30          989.0           45.0
     2011041518         125.40         -12.00          989.0           45.0
     2011041600         125.10         -11.70          985.0           50.0
     2011041606         124.80         -11.40          987.0           50.0
     2011041612         124.90         -11.20          982.0           55.0
     2011041618         125.10         -11.20          985.0           50.0
     2011041700         125.20         -11.00          989.0           45.0
     2011041706         125.20         -10.40          993.0           40.0
     2011041712         124.90         -10.10          996.0           35.0
     2011041718         124.60          -9.90          996.0           35.0
     2011041800         124.20          -9.70         1000.0           30.0
     2011041806         123.80          -9.60         1004.0           25.0