The "Typhoon Signal" system is used in Hong Kong. It doesn't use categories like the Saffir-Simpson Hurricane Wind Scale used in the US.
Here's how the Hong Kong Typhoon Signal System works:
* Signal No. 1: Issued when a tropical cyclone is at least 300 km (186 miles) from Hong Kong and is expected to approach within 24 hours. Wind speeds are not specified for Signal No. 1.
* Signal No. 3: Issued when a tropical cyclone is within 200 km (124 miles) of Hong Kong and is expected to approach within 12 hours. Wind speeds are generally around 40-62 km/h (25-39 mph).
* Signal No. 8: Issued when the strongest winds of a tropical cyclone are expected to reach Hong Kong within 3 hours. Wind speeds can vary depending on the specific storm, but are generally around 62-118 km/h (39-73 mph) or stronger.
In summary: Signal No. 1 doesn't have a specific wind speed. It signifies that a typhoon is approaching and precautionary measures may be needed.
