PAGASA Experts: Sierra Madre mountains weaken typhoons and protect communities in Eastern Luzon

Some experts say the Sierra Madre mountains played a key role in reducing typhoon intensity after a landfall on Eastern Luzon.

According to PAGASA and veteran international storm chasers, while the range cannot stop typhoons from hitting the coast, its rugged terrain creates friction that slows storm winds, lessening the impact on inland communities – a phenomenon observed during Severe Tropical Storm Pepito in 2024.

They also note that while the Sierra Madre reduces wind strength, it has little effect on heavy rainfall, which continues to pose serious risks, including flooding and landslides. Authorities and experts stress that disaster preparedness remains crucial for communities in eastern Luzon.

American storm chaser Josh Morgerman, who is documenting Super Typhoon Uwan (Fung-Wong), also shared his sentiment to correct misconceptions: "Many folks are posting misinformation about the Sierra Madre Mountains in the Philippines. Let me set the record straight: The Sierra Madre chain weakens typhoons after they make landfall on the east coast of Luzon. These mountains do not protect the east coast of Luzon, which regularly experiences some of the strongest tropical cyclone impacts in the world."

Beyond storm mitigation, the Sierra Madre holds environmental and cultural significance. It is home to diverse wildlife and forests that help prevent soil erosion and maintain ecological balance.

September 26 is designated "Save Sierra Madre Day" under Presidential Proclamation 413, highlighting the importance of preserving this vital natural landmark.