That is the Philippines designation for tropical storm Ketsana, which is currently moving west across the Philippines. It is dumping vast amounts of rain on the archipelago, leading to catastrophic flooding in the northern island of Luzon, and in the capital Manila. The website for the local weatherservice (PAGASA) has been inaccessible throughout today, probably due to high demand.
Ketsana is only a marginal tropical storm in terms of windspeed, but is carrying large amounts of water, as is typical of tropical systems. After leaving the Philippines later today (GMT), the system will move across the South China Sea, to make landfall in central Vietnam on Tuesday.
Image courtesy Xinhua