Cyclonic Storm Senyar, referred to as Tropical Depression 34W after its crossover,
is an exceptionally rare and very deadly tropical cyclone that brought heavy rains, catastrophic flooding and landslides to the Malay Peninsula and Sumatra in late November 2025. The thirteenth tropical depression and third cyclone of the
2025 North Indian Ocean cyclone season,
Senyar developed in the Strait of Malacca from a low-pressure area that formed on 22 November. The disturbance headed westwards and intensified into a depression and then a deep depression on 25 November. It then further intensified into a cyclonic storm before making landfall on northern
Sumatra near midnight on 26 November, and then paralleled the Sumatran coast as it weakened and made a second landfall in
Peninsular Malaysia. It was the second tropical cyclone documented in the Strait of Malacca after
Tropical Storm Vamei in 2001, and
the first to form there since the beginning of reliable records.
Senyar's remnants moved over Malaysia and emerged back into the
South China Sea on 28 November, after which the
Japan Meteorological Agency began tracking it. The
Joint Typhoon Warning Center also resumed advisories, stating that it had moved into the Western Pacific basin and regenerated.
Senyar caused heavy flooding and landslides across
central and
southern Thailand (especially
Songkhla province),
peninsular Malaysia, and Sumatra, Indonesia,
killing over 600 people in the three countries. At least 343 deaths, 937 injuries and 316 missing persons were reported in Indonesia, all of them in
North Sumatra,
West Sumatra and
Aceh Provinces. Thailand also recorded 263 fatalities across 14 provinces, including approximately 200 in Songkhla alone, although some officials claim a much higher figure.