Meteorological analysis of waterspout phenomenon over Kepulauan Seribu October 23 rd , 2017

Abstract

On October 23 rd , 2017 at 16.15 UTC or 09.15 LT a rare phenomenon of waterspout occured over Kepulauan Seribu. The waterspout identified as a short-lived waterspout because it lasted for 15 minutes. The local people of Kepulauan Seribu said that this rare phenomenon created a wind gust and high waves train as it moves. Eventhough this phenomenon just lasted for only 15 minutes but it was enough time to make local people frightened. Meteorological analysis was done by us to find out the natural trigger of the waterspout. We are using analitical method of research by using visual data from Himawari 8-EH satellite, weather radar from BMKG, radiosonde, streamline, sea surface temperature data, reanalysis model, and surface weather data from global, regional, and local scale. Based from the data and parameters, the waterspout was triggered by a very-local atmospherical unstabillity that made up a very-high convective Cumulonimbus cloud that developed the waterspout. Hopefully this research can be an additional reference for meteorological officer to make a waterspout early warning notice to reduce the hazard that made by waterspout to the local people of Kepulauan Seribu.