Typhoon Ketsana(ondoy)- 2009 original video

On September 22, an area of convectional cloudiness associated with the monsoon trough had formed about 720 km (450 mi), to the east of Manila, Philippines.[148] Satellite imagery showed deep convection starting to consolidate about an LLCC. In the afternoon of the next day, the system started showing good outflow in LLCC and was moving through moderate vertical shear whilst the JMA upgraded the system to a tropical depression. On the evening of the same day, the JMA reported that the depression weakened into an area of low pressure. In the afternoon of September 24, the JMA reported that the system was organizing again and was upgraded to a tropical depression again, while the PAGASA also upgraded the system to a tropical depression and assigned it the local name Ondoy. On the same day, the JTWC also issued a TCFA on the system. Early the next day, the JTWC upgraded the system to a tropical depression again. In the evening, the PAGASA reported that Ondoy intensified into a tropical storm. Early on September 26, the JTWC upgraded the depression to a tropical storm as well. At the same time, JMA also upgraded it as a tropical storm and assigned it the international designated name Ketsana.

In the Philippines, the whole archipelago experienced a torrential rain starting on September 23. More than 30 areas in Luzon, including Metro Manila, were placed under storm alerts as tropical storm "Ondoy" accelerated further and moved closer to Central Luzon. On Bicol region, ferry passengers were suspended during September 25 through the next day due to high waves and heavy rains that were brought by Ketsana into the region affecting about 2000 people. In the Manila International Airport, 13 flights were cancelled due to Ketsana making landfall. Some universities in Manila suspended their classes due to severe flooding in some areas and heavy rainfall.

In addition, the PAGASA also advised residents living in low-lying areas and near mountain slopes in areas affected by the Southwest Monsoon and those under signals #1 and #2 (see below) are alerted against possible flashfloods and landslides. Also, PAGASA has alerted the National Disaster Coordinating Council (NDCC) for possible flashfloods and landslides in the affected areas, partcularly in Laguna, Quezon, Zambales, Pampanga and Bataan provinces. Philippine Coast Guard commandant Admiral Wilfredo Tamayo also reminded owners of seacraft of a guideline barring travel for seacraft weighing 1,000 tons or less.

A total of 25 provinces and Metro Manila were placed under state of calamity, with Metro Manila experiencing a record amount of rainfall in 42 years, with rain falling between 8:00 a.m. and 2:00 p.m. of September 26 pegged at 341mm, over the record established in June 1967 at 334mm.[149]

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