Storm warning system should be updated
I noticed on the Hong Kong Observatory website that we are celebrating 100 years of typhoon signals. Doesn’t that suggest that it may be time for a major revision? The current system is based on The Beaufort Scale of wind-force, a centuries old system developed for mariners in sailing vessels.
The No 8 signal means that gale-force winds are expected (Beaufort 8, 34-40 knots, 63-74 km/h) and Hong Kong closes down. Imagine if gales caused a shut-down in Europe; the place would be closed for half the year.
In recent years, tropical cyclone path prediction has advanced greatly and satellite imaging and radar allow the Observatory to provide amazingly accurate forecasts. Why is it using its cyclone warning system which hasn’t seen any updating since 1973 – and that change was just about wind direction?
I do understand the real danger posed by a full-blown typhoon and the need for people to get into shelter.
I have been out in the “supreme wind” and it has amazing force. However, to close down a modern city for a gale is a bit of a joke. The No 8 also invalidates most driving insurance, adding to the inconvenience.
The Observatory does a really excellent job and it is a pity to see its great work let down by an outdated tropical cyclone warning system.