Hazard- Thunderstorms, Lightning and Rain
Hong Kong International Airport: Airport Thunderstorm and Lightning Alerting System (ATLAS) to minimize the potential threat of lightning strikes
ATLAS: Enhancing Lightning Safety at Hong Kong International Airport
Keywords
Hong Kong International Airport (HKIA), situated on Chek Lap Kok island, is a pivotal aviation hub in Asia and one of the busiest airports globally. Since its inauguration in 1998, HKIA has grown to accommodate over 53 million passengers annually, making it a vital gateway for international travel. The airport is renowned for its state-of-the-art facilities, including one of the world’s largest passenger terminal buildings, which offers an extensive range of amenities such as shopping, dining, and lounges. HKIA serves as a hub for major airlines like Cathay Pacific and Hong Kong Airlines, connecting travelers to numerous destinations worldwide.
Operational challenges
Hong Kong International Airport faces several operational challenges during thunderstorms and lightning events:
- Safety of Personnel: Ensuring the safety of ground staff and passengers is paramount. During Red warnings, all personnel on the apron are advised to take shelter, which can disrupt normal operations.
- Operational Delays: The suspension of non-essential activities during Amber warnings and the halting of all outdoor activities during Red warnings can lead to delays in passenger embarkation/disembarkation, baggage reclaim, and cargo handling.
- Communication and Coordination: Effective communication and coordination are crucial to manage the disruptions caused by lightning alerts. The Airport Lightning Warning System (ALWS) disseminates information through warning lights and sirens, but ensuring all personnel and passengers follow the guidelines can be challenging.
- Weather Forecasting Accuracy: Predicting the exact timing and location of lightning strikes is complex. The ATLAS system uses advanced techniques like Tracking Radar Echoes by Correlation (TREC) to forecast lightning, but the inherent unpredictability of weather can still pose challenges
Measures
Hong Kong International Airport has implemented several measures to protect against lightning, primarily through the Airport Thunderstorm and Lightning Alerting System (ATLAS). The Airport Thunderstorm and Lightning Alerting System (ATLAS) is a sophisticated system developed by the Hong Kong Observatory to enhance safety at Hong Kong International Airport by minimizing the risks associated with lightning strikes, this system may prepare the airport in case of emergency by thunderstorms.
Key Features of ATLAS:
Lightning Detection and Forecasting:
- ATLAS tracks radar echoes and lightning activities to predict when lightning will affect the airport.
- It uses data from the Lightning Location Information System (LLIS) and the lightning detection system of China Light and Power (CLP).
Warning Levels:
- AMBER Warning: Issued when cloud-to-ground lightning is predicted to affect the area within a 5-km perimeter of the airport or when intense radar echoes are within 15 km. During this warning, non-essential activities on the airport apron are suspended.
- RED Warning: Issued when cloud-to-ground lightning is affecting or predicted to affect within 1 km of the airport island. All personnel on the apron are advised to take protective shelter.
Safety Protocols:
- During a RED warning, passengers are advised to stay inside sheltered areas such as aircraft and the Passenger Terminal.
- The system ensures the safety of ground staff and passengers by suspending apron activities during severe weather conditions.
Integration with Airport Systems:
- ATLAS alert signals are disseminated via the Airport Lightning Warning System (ALWS), which includes apron warning lights and sirens
Weather Forecasting Accuracy:
- Predicting the exact timing and location of lightning strikes is complex. The ATLAS system uses advanced techniques like Tracking Radar Echoes by Correlation (TREC) to forecast lightning, but the inherent unpredictability of weather can still pose challenges.
