Widya Ayuningtiyas, University of East Anglia, Environmental Science, Norwich, United Kingdom, Nelly Riama, Indonesian Agency for Meteorology, Climatology and Geophysics, Geophysics, Jakarta, Indonesia, Benjamin Webber, University of East Anglia, Norwich, United Kingdom and Eko Prasetyo, Indonesian Agency for Meteorology, Climatology and Geophysics, Center for Marine Meteorology, Jakarta, Indonesia