Sorsogon Storm Surge Hazard Maps

NOAH uses four advisory/warning levels for storm surges, categorized based on the Storm Surge Advisory (SSA) levels depending on their height:

• SSA 1 (2.01m-3m)

• SSA 2 (3.01m-4m)

• SSA 3 (4.01m-5m)

• SSA 4 (5m and above)

I hope this helps avoid confusion, since PAGASA uses different Storm Surge Warning Levels:

• "Less than 2 meters"

• "2 to 3 meters"

• "More than 3 meters"

Still, this can be a useful guide to determine if your area might be affected by storm surges and the flooding they cause.

Each SSA level includes hazard classifications of low, moderate, and high based on the floodwater height and its impacts. These are indicated on the map with yellow, orange, or red colors:
🟡 Low Hazard Level (up to 0.5m) [YELLOW]: Floodwater reaching up to 0.5 meters (ankle to knee level), causing minor inconvenience, especially in coastal areas.

🟠 Moderate Hazard Level (up to 1.5m) [ORANGE]: Floodwater reaching up to 1.5 meters (waist to chest level), potentially impacting residential areas, particularly low-lying ones. This can cause moderate damage to infrastructure like roads and utilities and pose risks to people in flood-prone areas.

🔴 High Hazard Level (above 1.5m) [RED]: Floodwater exceeding 1.5 meters, which can reach or surpass head height. This causes widespread flooding with significant risks. Large areas may be affected, and residential and commercial properties could suffer severe damage, making many places inaccessible.

❗ Note: These hazard levels refer to flooding caused by storm surges alone, not including rainfall-induced flooding. When combined with heavy rainfall, water levels can rise higher, and more areas could be affected. Low-lying locations near rivers, seas, and similar areas face a higher risk.

For more interactive viewing of hazard data and extensive hazard maps, visit the UP NOAH website:
👉 https://noah.up.edu.ph/