Rainfall amount data map from Department of Science and Technology's Project NOAH
MANILA – Strong rains brought by Tropical Storm ''Mario'' hit most parts of Luzon on Friday morning, triggering floods in low-lying areas.
Torrential rains hit parts of Luzon on Friday morning due to the combined effects of the southwest monsoon (habagat) and the storm itself.
Latest data from the Department of Science and Technology's (DOST) Project NOAH indicated that the rains spawned by Mario were most felt in parts of Bulacan and Rizal, and northern portion of Metro Manila.
Project NOAH said these areas experienced an accumulated rainfall of at least 60 millimeters in the past three hours.
State weather bureau PAGASA said Mario intensified as it moved towards northern Luzon. The storm, however, slowed down.
As of 4 a.m., Mario was spotted 212 kilometers east of Casiguran, Aurora. It was packing maximum sustained winds of 85 kilometers per hour near the center and gusts of 100 kph.
The storm was moving west northwest at 22 kph.
Public storm warning signal number 2 was hoisted over Cagayan, Calayan and Babuyan Group of Islands, Isabela, Kalinga, Apayao, Mt. Province, Abra, and Ilocos Norte.
These areas should experience winds of 61 to 100 kph in at least 24 hrs.
Signal number 1, on the other hand, was hoisted over Aurora, Quirino, Nueva Vizcaya, Ifugao, Benguet, Ilocos Sur, La Union, and Batanes Group of Islands.
Areas under signal no. 1 should experience winds of 30 to 60 kph is expected in at least 36 hours.
PAGASA said an estimated rainfall amount of 7 to 20 millimeters per hour (moderate - intense) is expected within the 350-km diameter of the storm.
PAGASA forecaster Buddy Javier said the storm is expected to make landfall over Cagayan-Isabela area within the day. He said after hitting land, the storm will "re-curve'' and move towards Japan.
Red rainfall alert
Meanwhile, in its 6 a.m. advisory, PAGASA raised the Red rainfall alert (torrential) over Metro Manila, Rizal and Bulacan.
PAGASA said areas under the Red rainfall alert experienced more than 30 millimeters of rain in the past hour and is expected to continue in the next two hours. Severe flooding is expected in low-lying areas.
Meanwhile, Orange rainfall alert (intense) was raised over Laguna.
Areas under the Orange rainfall alert experienced 15-30 millimeters of rain in the past hour and is expected to continue in the next two hours.
Yellow rainfall alert (heavy) was hoisted over Cavite, Batangas and Quezon.
Areas under the Yellow rainfall alert experienced 7.5 – 15 millimeters of rain in the past hour and is expected to continue in the next two hours.
Track of tropical storm "Mario". Image courtesy of PAGASA.