Weather Advisory No. 21
For: Tropical Cyclone MAYMAY and Southwest Monsoon
Issued at: Aug. 6, 2026, 11 p.m.
Heavy rainfall outlook due to Tropical Cyclone Maymay
Tonight to tomorrow evening (August 7)
(50-100 mm):
Ilocos Sur, La Union, Pangasinan, and Benguet
Heavy rainfall outlook due to Southwest Monsoon
Tonight to tomorrow evening (August 7)
Heavy to Intense (100-200 mm):
Occidental Mindoro
Moderate to Heavy (50-100 mm):
Zambales, Bataan, Tarlac, Pampanga, Bulacan, Metro Manila, Rizal, Cavite, Laguna, and Batangas
Tomorrow evening to Saturday evening (August 
Heavy to Intense (100-200 mm):
Zambales, Bataan, and Occidental Mindoro
Moderate to Heavy (50-100 mm):
Ilocos Sur, La Union, Pangasinan, Abra, Benguet, Tarlac, Pampanga, Metro Manila, Cavite, Batangas, and Antique
Saturday evening to Sunday evening (August 9)
Heavy to Intense (100-200 mm):
Ilocos Sur, La Union, Abra, Benguet, and Zambales
Moderate to Heavy (50-100 mm):
Ilocos Norte, Pangasinan, Apayao, Kalinga, Mountain Province, Ifugao, Nueva Vizcaya, Tarlac, Nueva Ecija, Bataan, Pampanga, and Occidental Mindoro
Forecast rainfall may be higher in mountainous and elevated areas. Moreover, impacts in some areas may be worsened by significant antecedent rainfall.
The public disaster risk reduction and management offices concerned are advised to take all necessary measure to protect life and property. PAGASA Regional Services Divisions may issue Heavy Rainfall Warnings/Thunderstorms Advisories, and other severe weather information specific to their areas of responsibility as appropriate.
Unless significant changes occur, the next Weather Advisory will be issued at 5:00 AM tomorrow.
π π¨π« ππππ’ππ’π¨π§ππ₯ ππ§ππ¨π«π¦πππ’π¨π§: The key difference between a ππππ―π² πππ’π§πππ₯π₯ πππ«π§π’π§π and a πππππ‘ππ« πππ―π’π¬π¨π«π² lies in their forecast period, coverage areas, and accuracy. A ππππ―π² πππ’π§πππ₯π₯ πππ«π§π’π§π provides forecasts for the next three hours and applies up to the municipal level. It is more precise as it utilizes Doppler radar technology to track real-time rainfall intensity, making it highly effective for immediate decision-making in flood-prone areas. A πππππ‘ππ« πππ―π’π¬π¨π«π², on the other hand, covers a 24-hour period but is issued only at the provincial level. It provides a broader outlook on potential weather disturbances but lacks the short-term accuracy of ππππ―π² πππ’π§πππ₯π₯ πππ«π§π’π§π π¬. For class suspensions or other official decisions, please refer to ππππ―π² πππ’π§πππ₯π₯ πππ«π§π’π§π π¬ issued by the respective PAGASA Regional Services Divisions.
PAGASA-National Capital Region PRSD
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