Typhoon Maemi ( ) , known in the Philippines as Typhoon Pogi , was the most powerful typhoon Catastrophe to strike Attack South Korea since record-keeping began Process_start in the country in 1904 .

Maemi formed Coming_to_be on September 4 , 2003 from a disturbance in a monsoon trough in the western Pacific Ocean .

While near peak intensity , Maemi decelerated and began Process_start turning Becoming to the north-northeast .

Due to warm waters , Maemi was able to maintain Preserving much of its intensity before it made Creating landfall Self_motion just west of Busan , South Korea , on September 12 .

Maemi caused Causation heavy rainfall there , with rates of in an hour and in 24 hours , the latter setting Placing a record Recording .

On Jeju Island , Maemi produced Creating a peak wind gust of 216 km/h ( 134 mph ) and a minimum pressure of , both setting Creating records Recording for the country ; the pressure reading broke Destroying the longstanding lowest pressure set by Typhoon Sarah in 1959 .

Across South Korea , Maemi killed Killing 117 people , and overall damage Damaging totaled ₩5.52 trillion won ( KRW , US $ 4.8 billion ) .