Weather Advisory No. 28

Weather Advisory No. 28

For: Tropical Cyclone OPONG and Southwest Monsoon

Issued at: 11 AM, 26 September 2025

Heavy rainfall outlook due to Tropical Cyclone OPONG

Today to tomorrow noon (September 27)

(>200 mm):

Occidental Mindoro, Oriental Mindoro, and Romblon

(100-200 mm):

Palawan, Quezon, Laguna, Batangas, Masbate, Biliran, Marinduque, Aklan, Antique, and Capiz

(50-100 mm):

Metro Manila, Bataan, Cavite, Rizal, Aurora, Isabela, Iloilo, Northern Samar, Eastern Samar, Samar, Sorsogon, Albay, and Camarines Sur

Heavy rainfall outlook due to Southwest Monsoon

Today to tomorrow noon (September 27)

(50-100 mm):

Negros Occidental, Negros Oriental, Guimaras, Cebu, Bohol, Leyte, and Southern Leyte

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 measures to protect life and property. PAGASA Regional Services Divisions may issue Heavy Rainfall Warnings/Thunderstorm 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 PM today.

𝐅𝐨𝐫 𝐀𝐝𝐝𝐢𝐭𝐢𝐨𝐧𝐚𝐥 𝐈𝐧𝐟𝐨𝐫𝐦𝐚𝐭𝐢𝐨𝐧: The key difference between a 𝐇𝐞𝐚𝐯𝐲 𝐑𝐚𝐢𝐧𝐟𝐚𝐥𝐥 𝐖𝐚𝐫𝐧𝐢𝐧𝐠 and a 𝐖𝐞𝐚𝐭𝐡𝐞𝐫 𝐀𝐝𝐯𝐢𝐬𝐨𝐫𝐲 lies in their forecast period, coverage areas, and accuracy. A 𝐇𝐞𝐚𝐯𝐲 𝐑𝐚𝐢𝐧𝐟𝐚𝐥𝐥 𝐖𝐚𝐫𝐧𝐢𝐧𝐠 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 𝐖𝐞𝐚𝐭𝐡𝐞𝐫 𝐀𝐝𝐯𝐢𝐬𝐨𝐫𝐲, 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 𝐇𝐞𝐚𝐯𝐲 𝐑𝐚𝐢𝐧𝐟𝐚𝐥𝐥 𝐖𝐚𝐫𝐧𝐢𝐧𝐠𝐬.

For class suspensions or other official decisions, please refer to 𝐇𝐞𝐚𝐯𝐲 𝐑𝐚𝐢𝐧𝐟𝐚𝐥𝐥 𝐖𝐚𝐫𝐧𝐢𝐧𝐠𝐬 issued by the respective PAGASA Regional Services Divisions.

NORTHERN LUZON PRSD

PAGASA-National Capital Region PRSD

Pagasa Southern Luzon

PAGASA Visayas PRSD

MINDANAO PRSD