MANILA - The low pressure area being monitored off Mindanao may develop into a tropical depression within 24 hours and be the first storm of 2019, the weather bureau said Friday.
The weather system, which will be named "Amang," may enter the Philippine area of responsibility on Saturday and make landfall over Caraga region on Sunday, PAGASA forecaster Gener Quitlong said.
If the LPA develops into a tropical depression, storm warning signals may be raised over Eastern Samar and Caraga on Saturday, Quitlong added.
Moderate to heavy rains are expected to persist over Eastern Visayas, Caraga, Compostela Valley, and Davao Oriental on Saturday.
Meanwhile, moderate to heavy rains are expected to prevail over Bicol, Eastern Visayas, Central Visayas, Compostela Valley, Davao Oriental, Southern Quezon, Mindoro provinces, Romblon, and Marinduque.
Flood warnings may be raised in almost all the river basins in the southern half of the country as the storm traverses its track, said hydrologist Ed Dela Cruz.
Authorities will also closely monitor water levels in Angat Dam, which is slightly above its normal level, and Pantabangan Dam, which is located in the eastern side of Luzon, he said.
The Mines and Geosciences Bureau also warned that 1,163 barangays in Calabarzon, 483 in Eastern Visayas, 101 in Northern Mindanao, 573 in Caraga, and 4 in the Davao Region may be affected by possible landslides or flooding.
Local government units are told to closely monitor rainfall in their area and initiate preemptive evacuation if necessary.
A comprehensive list of the barangays and their vulnerability to flooding and landslide has been transmitted to the Department of the Interior and Local Government, Department of Social Welfare and Development, and the Office of Civil Defense. A geohazard map has also been uploaded on the MGB's website.
Visit the ABS-CBN Weather Center for the latest updates on the weather.