nocturnal thunderstorm development deep inland over Peninsula Malaysia
Typically, thunderstorms over land in tropical areas develop during the afternoon as solar heating increases instability, triggers the formation of thermals and also the formation of sea breezes and sea breeze convergence.
However, overnight during the wee hours, thunderstorms started developing over land over Peninsula Malaysia.
These thunderstorms were likely triggered by low level wind convergence towards a low pressure trough as the 925 hPa winds chart in the ECMWF model below shows.
One can also see plenty of more intense thunderstorms that developed over the Straits of Melaka that are associated with the collision of the land breezes from Peninsula Malaysia and Sumatra. These are common.
Satellite loop showing the nocturnal thunderstorm development over land:
However, overnight during the wee hours, thunderstorms started developing over land over Peninsula Malaysia.
These thunderstorms were likely triggered by low level wind convergence towards a low pressure trough as the 925 hPa winds chart in the ECMWF model below shows.
One can also see plenty of more intense thunderstorms that developed over the Straits of Melaka that are associated with the collision of the land breezes from Peninsula Malaysia and Sumatra. These are common.
Satellite loop showing the nocturnal thunderstorm development over land:
ECMWF 925 hPa winds showing low level wind convergence towards a low pressure trough: