Signals No. 5, 6, 7 and 8 were used to signify gales from the NW, SW, NE and SE respectively between 1931 and 1972. To avoid misunderstanding by the public, the Signals No. 5 to 8 were replaced by the Signals No. 8 NW, 8 SW, 8 NE and 8 SE in 1 January 1973. The Signals No. 8 NW, 8 SW, 8 NE and 8 SE between 1946 and 1972 as shown in this database were originally the Signals No. 5 to 8 used at the time.

The "3*" as displayed in this database refers to the "Local Strong Wind Signal" adopted in Hong Kong between 1 January 1950 and 14 April 1956 which covered warning of strong winds due to monsoon or less intense tropical cyclones. With effect from 15 April 1956, the Strong Monsoon Signal and the Tropical Cyclone Strong Wind Signal No. 3 were introduced to delineate the warnings for monsoon systems and tropical cyclones.

S at Start Time or End Time column indicates Summer Time HKT + 1 hour.