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Advocates Philippines
Low Pressure Systems And Monsoon Rains: What To Expect In The Next 24 Hours
Photo credit: DOST-PAGASA
As of 8:00 AM today, July 22, 2025, weather monitoring has shown increasing activity in and around the Philippine Area of Responsibility (PAR). Three low pressure areas (LPAs) are currently being tracked, with two already inside PAR and another just outside.
The LPA designated as 07g has developed a high potential of intensifying into a tropical depression within the next 24 hours. Another system, LPA 07h, remains under watch with a medium potential to reach the same level of development within the same time frame. Outside PAR, a third system, LPA 07i, also shows medium potential for development.
These weather disturbances are enhancing the southwest monsoon, bringing sustained and at times heavy rainfall to large parts of Luzon and nearby islands. Forecasts for today through tomorrow noon indicate rainfall exceeding 200 millimeters in areas including Zambales, Bataan, Metro Manila, Cavite, Batangas, and Occidental Mindoro. Rainfall of 100 to 200 millimeters is expected in Pangasinan, Benguet, Tarlac, Pampanga, Bulacan, Laguna, and Rizal. Lesser but still significant rainfall of 50 to 100 millimeters may affect Ilocos provinces, parts of the Cordilleras, Quezon, Palawan, and several other provinces in Southern Luzon and Western Visayas.
By tomorrow noon through Thursday, July 24, heavier rains are forecast to persist over Pangasinan, Zambales, and Bataan, with moderate to heavy rains spreading again to surrounding provinces, Metro Manila, and the Mindoro area. Rainfall is expected to gradually ease into Friday, but notable amounts are still likely in western sections of Northern and Central Luzon as well as the capital region.
Forecast rainfall amounts may be higher in mountainous or elevated areas, and given already wet ground conditions, impacts could be more severe in places that have experienced significant rain in recent days. Residents and local authorities are advised to remain vigilant, take protective measures where needed, and monitor for updated advisories or warnings from PAGASA.
Separately, the hydrological situation at La Mesa Dam remains a cause for concern. As of 9:00 AM today, the dam’s water level stood at 80.17 meters and continues to overflow. This is expected to affect low-lying communities along the Tullahan River, including parts of Quezon City, Valenzuela, Caloocan, Malabon, and Navotas. Residents in these areas, especially those close to riverbanks, are urged to take appropriate action as necessary. PAGASA continues to monitor the dam and will issue updates to local government units and other concerned agencies.
The LPA designated as 07g has developed a high potential of intensifying into a tropical depression within the next 24 hours. Another system, LPA 07h, remains under watch with a medium potential to reach the same level of development within the same time frame. Outside PAR, a third system, LPA 07i, also shows medium potential for development.
These weather disturbances are enhancing the southwest monsoon, bringing sustained and at times heavy rainfall to large parts of Luzon and nearby islands. Forecasts for today through tomorrow noon indicate rainfall exceeding 200 millimeters in areas including Zambales, Bataan, Metro Manila, Cavite, Batangas, and Occidental Mindoro. Rainfall of 100 to 200 millimeters is expected in Pangasinan, Benguet, Tarlac, Pampanga, Bulacan, Laguna, and Rizal. Lesser but still significant rainfall of 50 to 100 millimeters may affect Ilocos provinces, parts of the Cordilleras, Quezon, Palawan, and several other provinces in Southern Luzon and Western Visayas.
By tomorrow noon through Thursday, July 24, heavier rains are forecast to persist over Pangasinan, Zambales, and Bataan, with moderate to heavy rains spreading again to surrounding provinces, Metro Manila, and the Mindoro area. Rainfall is expected to gradually ease into Friday, but notable amounts are still likely in western sections of Northern and Central Luzon as well as the capital region.
Forecast rainfall amounts may be higher in mountainous or elevated areas, and given already wet ground conditions, impacts could be more severe in places that have experienced significant rain in recent days. Residents and local authorities are advised to remain vigilant, take protective measures where needed, and monitor for updated advisories or warnings from PAGASA.
Separately, the hydrological situation at La Mesa Dam remains a cause for concern. As of 9:00 AM today, the dam’s water level stood at 80.17 meters and continues to overflow. This is expected to affect low-lying communities along the Tullahan River, including parts of Quezon City, Valenzuela, Caloocan, Malabon, and Navotas. Residents in these areas, especially those close to riverbanks, are urged to take appropriate action as necessary. PAGASA continues to monitor the dam and will issue updates to local government units and other concerned agencies.
Jul 22, 2025
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