Two low-pressure areas are now being monitored by the Philippines’ meteorological agency, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), and models are hinting for a rainy week ahead to the first day of the year 2021.

According to PAGASA, the first low-pressure area is seen at 14.8 degrees north, 122 degrees east, 40 kilometers to the east of Infanta, Quezon. The second low-pressure area is seen at 11.2 degrees north, 117.8 degrees east, 190 kilometers to the north-northwest of Puerto Princesa City, Palawan. Additionally, the northeast monsoon (locally known as “Amihan”) is affecting northern Luzon. The first low-pressure area is affecting Luzon, bringing rains to the said island.

The PAGASA also noted that development on these two areas cannot be ruled out yet due to their cloud system seeing improvements over the past 12 hours. Models have been keen for a rainy week coming in, with the latest GFS run having a lot of rainfall on parts of Luzon and Visayas due to the first low-pressure area and the monsoon.

The latest GFS run at 120 hours shows rainfall in parts of the Philippines. Courtesy of tropicaltidbits.com.

The PAGASA’s weather forecast tomorrow, December 28, is:

  • Moderate to heavy rains over Cagayan including Babuyan Islands, Isabela, the northern portion of Apayao, the northern portion of Ilocos Norte, and Aurora,
  • and light to moderate with at times heavy rains over Metro Manila, CALABARZON, Kalinga, Mountain Province, Ifugao, Kalayaan Islands, and the rest of Cagayan Valley, Central Luzon, and Apayao.

The agency also noted that flooding may occur “during heavy or prolonged periods of rainfall, especially in areas identified to be highly or very highly susceptible to these hazards or in localities that received significant amount rainfall over the past couple of days or weeks. Adjacent or nearby areas may also experience flooding in the absence of such rainfall occurrence due to surface runoff or swelling of river channels.”

Please stay updated with your local disaster officials and PAGASA. Stay tuned for updates.

References:

  1. PAGASA’s Weather Advisory: PAGASA (dost.gov.ph)
  2. PAGASA’s Daily Weather Forecast: PAGASA (dost.gov.ph)

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