Tropical Cyclone Senyar, November 2025 - Strait of Malacca

Rare Tropical Cyclone (TC) Senyar formed in the Strait of Malacca and made landfall in Indonesia's Sumatra, Peninsular Malaysia, and Southern Thailand, on November 26, 2025. Based on IBTrACS data (storm id: 2025330N05099), the storm's maximum intensity was 45 knots (around 83 km/hour) and 996 hPa. 

Despite being a "weak" storm in terms of wind speed, the impact of the cyclone was catastrophic, due to the extreme and prolonged rainfall it generated. ECMWF ERA5 Land Precipitation data shows that in some locations in Aceh, the recorded daily rainfall has reached 329 mm, which is equivalent to one month of rain just in a single day. 

The extreme rainfall has caused widespread flooding that swamped villages and major cities across Aceh, North Sumatra, and West Sumatra. But the high number of fatalities, currently at 1,141 dead and 163 still missing, was largely caused by deadly landslides, which were exacerbated by massive deforestation in Sumatra.