History of Hurricane Signal No.10

The issuance of typhoon signal No.10 indicates that the wind power in Hong Kong has reached or will reach the hurricane level (that is, the sustained wind speed is118km or more per hour). The scope of the hurricane is mainly in the circular area near the eye of the wind. Therefore, it takes a typhoon-level tropical cyclone to send out the No.10 hurricane signal, and it passes over Hong Kong in a short distance (about 100 km), which is generally called a "frontal attack" on Hong Kong.

Hong Kong and Macao are only a tiny target on the long coastline of East Asia. Even though an average of 65,438+06 typhoons are generated in the South China Sea of China and the western North Pacific every year, Hong Kong has only been hit by 65,438+03 typhoons since 65,438+0946. Since 1968, Macao has only been hit by four typhoons (Brendan in 9 1 was designated as a typhoon by the Macao Meteorological Bureau and a severe tropical storm by the Hong Kong Observatory). In other words, only one typhoon in every 65 will cause Hong Kong to issue the hurricane signal 10.

In the early 1960s, Hong Kong issued hurricane signal No.10 several times. From 1960 to 1964, once a year on average, of which 1964 is the most special, even twice a year. After this busy day, the frequency of typhoon signal No.10 is reduced to once every three or four years. The eighties were relatively calm, only once. Similarly, it was not until 1999 and 10 typhoon signals were first released in the 1990s.

Since 1946, a total of 13 typhoons have caused Hong Kong to hang/issue the No.10 hurricane signal.

Typhoon unknown, 1946

Typhoon Gloria, 1957

Typhoon Mary, 1960

Typhoon Alice, 196 1 year.

Typhoon Wanda, 1962

Typhoon Ruby, 1964

Typhoon Dot, 1964

Typhoon Shirley, 1968

Typhoon Rose, 197 1 year.

Typhoon Elsie, 1975

Typhoon Hope, 1979