It is associated with the development of the Siberian High and the movement of the heating maxima from the Northern Hemisphere to the Southern Hemisphere . North-easterly winds flow down Southeast Asia , are turned north-westerly/westerly by Borneo topography towards Australia . This forms a cyclonic circulation vortex over Borneo , which together with descending cold surges of winter air from higher latitudes , cause significant weather phenomena in the region . Examples are the formation of a rare low-latitude tropical storm in 2001 , Tropical Storm Vamei , and the devastating flood of Jakarta in 2007
devastating flood of Jakarta
2007 Jakarta flood
Monsoon