Typhoon Signal 8 signifies that a tropical cyclone is approaching Hong Kong, bringing with it winds of gale or storm force, specifically originating from one of four quadrants.
Understanding Typhoon Signal 8
When Typhoon Signal No. 8 is hoisted in Hong Kong, it indicates a significant threat from a tropical cyclone. This warning is issued when sustained winds ranging from 63 to 117 kilometres per hour are expected or currently affecting the region.
Wind Speeds and Classification
The Signal 8 warning covers two distinct wind force classifications:
- Gale: Winds ranging from 63 to 87 kilometres per hour are classified as gale force.
- Storm: Winds ranging from 88 to 117 kilometres per hour are classified as storm force.
This signal is further specified by direction (e.g., Signal No. 8 Northeast Gale or Storm Signal), indicating the predominant direction from which the strong winds are expected.
Types of Signal No. 8
There are four specific types of No. 8 signals, each indicating the quadrant from which the gale or storm is expected to blow first:
| Signal Type | Indication |
|---|---|
| No. 8 Northeast | Gale or storm force winds expected from the northeast. |
| No. 8 Southeast | Gale or storm force winds expected from the southeast. |
| No. 8 Southwest | Gale or storm force winds expected from the southwest. |
| No. 8 Northwest | Gale or storm force winds expected from the northwest. |
The specific direction helps residents and authorities anticipate wind changes as the typhoon approaches and passes.
Immediate Impacts and Safety Measures
The hoisting of Typhoon Signal 8 triggers a series of critical public safety measures and operational changes across Hong Kong.
Public Safety Actions
When Signal 8 is in effect, it is crucial for residents to take immediate precautions:
- Stay Indoors: Remain in a safe place indoors, away from windows and doors, as flying debris can be a significant hazard.
- Secure Loose Objects: Ensure all loose items on balconies, rooftops, or outside the premises are secured or brought indoors to prevent them from becoming projectiles.
- Monitor Updates: Continuously check the latest weather bulletins and public announcements from the Hong Kong Observatory or other official sources.
- Prepare for Outages: Have flashlights, batteries, and a supply of food and water ready in case of power interruptions.
Operational Disruptions
Typhoon Signal 8 has a widespread impact on daily life and services:
- Work and Schools: Schools are immediately suspended. Many businesses, including most offices, banks, and retail stores, will close or send staff home. Essential services may operate on a limited basis.
- Public Transport: Most public transport services, including buses, trams, and ferries, are significantly reduced or suspended entirely. MTR (subway) services may operate on a limited schedule or become suspended as wind speeds intensify.
- Air and Sea Travel: Flights may be delayed, diverted, or canceled. Ferry services to outlying islands and across Victoria Harbour are typically suspended.
Understanding the implications of Typhoon Signal 8 is vital for personal safety and preparedness in Hong Kong.
