Tropical Storm Vamei causes widespread floods in Johor
27-28 December 2001
It is rare for storms such as this to occur this near to the Equator. In any case, it is the first time for such an occurrence over this region. The storm began as a low-pressure system over the South China Sea between Sarawak and southern Peninsular but intensified suddenly as a cold surge occurred over the northern Asian continent and weakened just as quickly as it made landfall over southeast Johor.
Rainfall analysis over Johor indicates the heaviest rain occurred in the south. The states of Kelantan, Terengganu and Pahang received heavy rain from the 28th as the monsoon winds strengthened.
The Meteorological Services Department had monitored the development of the storm from the beginning and had issued Storm Advisories four days in advance and Stage Red Heavy Rain Warnings and Category 3 Strong Wind And Rough Sea Warnings before the storm hit land.The warnings also indicated the expected heavy monsoon rains and strong winds at the same time over Kelantan, Terengganu, Pahang and their coastal waters.
Fig.1: Satellite imagery at 11.00 am 27.12.01 shows Storm Vamei approaching its peak intensity over the South China Sea
before making landfall over southeast Johor and weakening.
Fig.2: Forecast track of Storm Vamei from the Joint Typhoon Warning Center, Guam.
Actual track was to the north of the forecast track over the Straits of Melaka.
Fig.3: Rainfall Analysis shows the heaviest rain occurred over the southern Johor.