Typhoon Utor, known in the Philippines as Typhoon Seniang, swept through the central Philippines in December 2006, exacerbating the damage left behind by previous Philippine typhoon strikes that year. Residual moisture from the tropical cyclone indirectly contributed to extensive flooding in Malaysia. Utor originated from an area of disturbed weather that organized into a tropical depression on December 7 west-southwest of Yap. The cyclone steadily progressed westward while gradually intensifying, reaching tropical storm intensity late on December 7. On December 9 and the ensuing two days, Utor crossed the central Philippines and reached typhoon strength before weakening somewhat upon entry into the South China Sea. Reintensification ensued afterwards, and Utor reached its peak intensity on December 13 with maximum sustained winds of 155 km/h (100 mph) shortly after regaining typhoon strength. However, wind shear and dry air began to take its toll on Utor thereafter, quickly weakening the storm until its dissipation on December 15.