A Guide to Weather Warning Systems in Singapore

Singapore is no stranger to unpredictable weather patterns, ranging from heavy rainfall to thunderstorms. The National Environment Agency (NEA) of Singapore operates a comprehensive weather warning system to help residents prepare for severe weather events. This guide explains how the weather warning system works and how you can stay informed to ensure safety.

Weather Warnings in Singapore

The NEA issues weather warnings based on the severity of the weather and the potential impact on the public. These warnings include alerts for thunderstorms, heavy rain, haze, and flooding. The warning system is aimed at helping people make informed decisions to stay safe and avoid disruptions.

1. Thunderstorm Warnings

Thunderstorms are a frequent weather event in Singapore, especially during the Inter-Monsoon period from April to October. A thunderstorm warning is issued when thunderstorms are expected to cause disruptions or pose risks such as strong winds, lightning, or heavy rainfall.

Yellow Thunderstorm Advisory

• Meaning: Thunderstorms are expected in Singapore within the next 1 to 2 hours. While the storm may cause temporary inconvenience, the weather is not expected to be severe.

• Actions:

  • Stay indoors or take shelter.

  • Avoid outdoor activities, especially those involving water or high places.

  • Stay updated on the latest weather reports.

Red Thunderstorm Warning

• Meaning: Severe thunderstorms are likely to impact specific regions, with risks of intense lightning strikes, strong winds, and localized flooding.

• Actions:

  • Seek shelter immediately if outdoors.

  • Avoid using electrical appliances and stay away from windows.

  • Do not take public transport if possible, as delays or service interruptions may occur.

2. Heavy Rain Warnings

Heavy rainfall can lead to localized flooding, especially in low-lying areas of Singapore. The NEA issues heavy rain warnings to inform residents of prolonged periods of rainfall that may cause disruptions or hazardous conditions.

Heavy Rain Warning

• Meaning: There is a significant risk of intense rain over the next 2 to 3 hours, potentially leading to localized flooding in certain areas.

• Actions:

  • Avoid travel in areas prone to flooding.

  • Ensure proper drainage in your home and clear any obstructions.

  • Be cautious when driving in wet conditions, as visibility can be poor and roads may be slippery.

3. Haze Alerts

Singapore is sometimes affected by haze, a phenomenon caused by smoke from forest fires in nearby countries, particularly in Indonesia. The NEA monitors air quality through the Pollutant Standards Index (PSI), which provides updates on the level of pollutants in the air.

Haze Advisory

• Meaning: The PSI is expected to reach unhealthy levels. While the air quality may not be immediately hazardous, sensitive individuals should take precautions.

• Actions:

  • People with respiratory conditions (e.g., asthma) should reduce outdoor activities.

  • Close windows to prevent the entry of smoke into your home.

  • Wear a mask if you need to go outdoors.

Haze Alert

• Meaning: The PSI has reached unhealthy or hazardous levels (above 200), with severe health risks for the general public.

• Actions:

  • Avoid outdoor activities as much as possible.

  • If you must go outdoors, wear a suitable mask and limit physical exertion.

  • Stay indoors and ensure proper ventilation to minimize exposure to hazardous pollutants.

4. Flood Warnings

Flooding is a potential risk during periods of heavy rainfall or high tide. The NEA monitors local conditions and issues warnings when flooding is expected.

Flood Advisory

• Meaning: There is a risk of localized flooding in low-lying areas due to intense rainfall. The flooding may cause some inconvenience but is unlikely to be widespread.

• Actions:

  • Avoid low-lying areas that are prone to flooding.

  • Be prepared for possible delays in transport.

  • If you live in a flood-prone area, consider relocating temporarily or taking precautions.

Flood Warning

• Meaning: Significant flooding is expected in areas of Singapore. Flash floods may occur, and water levels could reach dangerous heights.

• Actions:

  • Move to higher ground immediately if you are in a flood-prone area.

  • Avoid traveling in affected areas. Roads may be impassable due to flooding.

  • Listen to official announcements and follow emergency evacuation instructions if needed.

How to Stay Informed

The National Environment Agency (NEA) provides real-time weather updates and warnings through various platforms:

• NEA Website: Check the official NEA website for detailed weather forecasts and alerts.

• NEA Mobile App: Download the NEA's mobile app for instant notifications and updates about weather warnings.

• SMS Alerts: Residents can sign up for SMS alerts to receive updates on severe weather events directly to their phones.

• Social Media: Follow the NEA’s social media pages (Facebook, Twitter) for the latest news on weather conditions and warnings.

• News Media: Stay tuned to local radio and TV stations for regular weather reports and updates.

The weather warning system in Singapore is designed to keep residents informed and prepared for potential weather hazards. Whether it’s a thunderstorm, heavy rain, haze, or flooding, the NEA ensures that the public receives timely and relevant information to protect themselves and minimize disruptions. By staying alert to the warnings and following safety protocols, you can better navigate Singapore’s ever-changing weather conditions.