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Royal Observatory was the title of the Hong Kong Observatory before 1.7.1997 |
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Unit Conversion - |
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1 knot  1.852 kilometre per hour (km/h) |
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1 nautical mile 1.852 kilometre (km) |
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1 millibar = 1 hectopascal (hPa) |
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Transformation of Tropical Cyclone Warning Signal System in H.K. |
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Years |
Tropical Cyclone Warning Signal No. |
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1956 - 1972 |
1 |
3 |
5 |
6 |
7 |
8 |
9 |
10 |
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1973 onwards |
1 |
3 |
8NW |
8SW |
8NE |
8SE |
9 |
10 |