Super Typhoon Nando (Ragasa), the Philippines’ 14th tropical cyclone for 2025, is threatening Northern Luzon and Central Luzon. It is bringing moderate to torrential rain and destructive winds, with Signal No. 5 already raised for the northern part of Babuyan Islands early Monday, September 22.
Nando is also enhancing the southwest monsoon or South, South, which is affecting Southern Luzon, the Visayas, and Mindanao.
The Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) warned the public to be on alert for hazards, including floods, landslides, and storm surges.
Bookmark this page for PAGASA forecasts on Nando and the southwest monsoon — including updates on the super typhoon’s track, tropical cyclone wind signals, rainfall warnings, and storm surge warnings — as well as the latest news, photos, and videos from affected areas.
LATEST UPDATES
Table of Contents
- 1. LATEST UPDATES
- 2. Help capture the situation on the ground
- 3. Over 2,700 flee homes in Northern, Central Luzon
- 4. Palace suspends September 22 classes in 30 areas
- 5. Nearly 300 people evacuate in Pamplona, Cagayan
- 6. Nando east of Aparri; LPA forms outside PAR
- 7. DSWD Cordillera prepares for Nando
- 8. How did the interaction between Super Typhoon Nando and the Southwest Monsoon (Habagat) contribute to the severity of the impacts experienced in Luzon?
- 9. Super Typhoon Nando and Southwest Monsoon: Impacts and Dynamics
- 10. Understanding the Synergistic Effects of Typhoon Nando & Habagat
- 11. The Dynamics of the Interaction: Nando & Habagat
- 12. Regional Impacts: Luzon Under Strain
- 13. Real-World Example: Magat Dam & Water Management
- 14. Benefits of Enhanced Weather Monitoring & Forecasting
Palace suspends September 22 classes in 30 areas
Malacañang suspended classes in all levels and government work in Metro Manila and 29 provinces for Monday, September 22.
Nearly 300 people evacuate in Pamplona, Cagayan
At least 110 families or 293 persons have evacuated in Pamplona, Cagayan, the Municipal Disaster Risk Reduction and Management Office (MDRRMO) reported on Sunday, September 21.
Citing the MDRRMO, the Cagayan Provincial Information Office said most of the families are staying at the municipal gym, while the rest are at an evacuation center in Barangay Nagattatan.
Nando east of Aparri; LPA forms outside PAR
Super Typhoon Nando (Ragasa) was already 485 kilometers east of Aparri, Cagayan, as of 2 pm on Sunday, September 21. It is moving west northwest at 15 kilometers per hour, with maximum sustained winds of 185 km/h and gustiness of up to 230 km/h.
A low pressure area also formed outside the Philippine Area of Responsibility on Sunday, located 1,835 kilometers east of northeastern Mindanao at 2 pm. So far, it has a low chance of developing into a tropical depression within 24 hours.
![[Walang Pasok] Class suspensions, Monday, September 22, 2025](https://www.rappler.com/tachyon/2022/10/walang-pasok-new-orange-02.jpg?fit=449%2C449)
DSWD Cordillera prepares for Nando
Family food packs from the Luzon Disaster Resource Center in Pasay City reached the Kalinga warehouse of the Department of Social Welfare and Development (DSWD) on Sunday, September 21.
The DSWD Cordillera Administrative Region also said food and non-food items have been prepositioned at its satellite warehouse in Ifugao, including 1,300 family food packs, 400 ready-to-eat food boxes, and other supplies.
How did the interaction between Super Typhoon Nando and the Southwest Monsoon (Habagat) contribute to the severity of the impacts experienced in Luzon?
Super Typhoon Nando and Southwest Monsoon: Impacts and Dynamics
Understanding the Synergistic Effects of Typhoon Nando & Habagat
The Philippines frequently experiences the combined impact of powerful weather systems,notably during the southwest monsoon (“Habagat”) season. In September 2025, Super Typhoon Nando (international name: Saola) considerably interacted with the prevailing Habagat, leading to widespread flooding, landslides, and disruptions across Luzon. This article details the dynamics of this interaction, the resulting impacts, and provides insights into preparedness and mitigation.Key terms related to this event include typhoon track, monsoon rains, flood warnings, landslide hazards, and weather disturbances.
The Dynamics of the Interaction: Nando & Habagat
Super Typhoon Nando,a Category 5 equivalent storm at its peak intensity,didn’t directly make landfall on the Philippines. However, its proximity and size were enough to intensify the southwest monsoon. Here’s a breakdown of the key dynamics:
* Monsoon Enhancement: Nando acted as a moisture source,drawing water from the Pacific Ocean and feeding it into the Habagat. This resulted in significantly increased rainfall over Luzon.
* Wind Shear: The typhoon’s circulation created wind shear, altering the typical flow of the monsoon winds and exacerbating rainfall in specific areas.
* Ridge Interaction: A subtropical ridge to the north of Nando steered the typhoon’s path, but also contributed to the prolonged exposure of Luzon to the enhanced monsoon.
* Fujiwara Effect (Potential): While not a primary driver, the proximity of another tropical cyclone in the region raised the possibility of a weak Fujiwara effect, subtly influencing Nando’s track and intensity.
Regional Impacts: Luzon Under Strain
The combined effect of Nando and Habagat resulted in ample impacts across Luzon.
* Heavy Rainfall & Flooding: Provinces like Cagayan, Isabela, Nueva Ecija, and bulacan experienced record-breaking rainfall totals, leading to widespread flooding. River systems overflowed, inundating agricultural lands and residential areas. Flood monitoring became critical.
* Landslides & Mudslides: The saturated soil, particularly in mountainous regions, triggered numerous landslides and mudslides. Areas in the Cordillera Administrative Region (CAR) and the Sierra Madre mountain range were particularly vulnerable. landslide early warning systems proved vital, though challenges in reaching remote communities remained.
* Infrastructure Damage: Roads and bridges were damaged or destroyed by flooding and landslides, disrupting transportation networks. Power outages were widespread due to downed power lines.
* Agricultural Losses: Vast areas of rice paddies and other crops were submerged, resulting in significant agricultural losses. The Department of Agriculture estimated initial damages in the billions of pesos.
* Displacement & Evacuation: Hundreds of thousands of people were forced to evacuate their homes, seeking shelter in evacuation centers. Disaster response teams were mobilized to provide assistance.
Real-World Example: Magat Dam & Water Management
the Magat Dam, a crucial reservoir in the Cagayan Valley, faced a critical situation during the peak of the storm. Water levels rose rapidly due to the intense rainfall, prompting authorities to release water from the dam’s spillways. This controlled release, while necessary to prevent a catastrophic dam failure, contributed to downstream flooding in several municipalities. This highlights the complex trade-offs involved in dam management during extreme weather events.
Benefits of Enhanced Weather Monitoring & Forecasting
Despite the devastation, advancements in weather monitoring and forecasting played a crucial role in mitigating the impact.
* Early Warnings: PAGASA (Philippine Atmospheric, Geophysical and Astronomical services management) issued timely and accurate severe weather alerts, allowing communities to prepare for the approaching storm and monsoon rains.
* Improved modeling: Enhanced weather models provided more accurate predictions of rainfall intensity and potential flood zones.
* Satellite Imagery & Radar: Real-time satellite imagery and radar data provided crucial facts on the typhoon’s track and intensity, as well as the extent of the monsoon rains.
* Social Media & Dialog: Social media platforms were used to
