PAGASA declares La Niña onset, forecasts above-normal rainfall and cyclones until March 2025
The Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) announced on Tuesday that La Niña has begun in the tropical Pacific Ocean.
Periods of cooler than average sea surface temperatures started in September 2024 and strengthened into a La Niña phenomenon by December 2024.
La Niña is expected to persist until at least March 2025, bringing above-normal rainfall that may cause floods, flashfloods, and rain-induced landslides.
PAGASA warned of an increased chance of tropical cyclone activity within the Philippine Area of Responsibility during this period.
The weather bureau predicts two to eight tropical cyclones may form or enter the PAR from January to June 2025.
This shift follows the end of El Niño in mid-2024, moving into ENSO-neutral conditions before transitioning to La Niña.
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