Tropical Cyclones in 2017 > Table 4.4
Table 4.4 Frequency and total duration of display of tropical cyclone warning signals: 1956 - 2017
Year |
Signals |
Total duration |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 |
3 |
8 NW |
8 SW |
8 NE |
8 SE |
9 |
10 |
hr |
min |
|
| 1956 | 5 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 191 | 25 |
| 1957 | 4 | 9 | 1 | 1 | 2 | 2 | 0 | 1 | 295 | 45 |
| 1958 | 4 | 5 | 0 | 0 | 1 | 0 | 0 | 0 | 214 | 5 |
| 1959 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 36 | 35 |
| 1960 | 11 | 7 | 0 | 2 | 2 | 2 | 1 | 1 | 432 | 35 |
| 1961 | 6 | 7 | 1 | 2 | 1 | 0 | 1 | 1 | 192 | 55 |
| 1962 | 4 | 3 | 0 | 1 | 1 | 0 | 1 | 1 | 158 | 10 |
| 1963 | 4 | 5 | 0 | 0 | 1 | 0 | 0 | 0 | 175 | 50 |
| 1964 | 11 | 14 | 1 | 3 | 5 | 3 | 3 | 2 | 570 | 15 |
| 1965 | 7 | 6 | 0 | 0 | 1 | 1 | 0 | 0 | 239 | 40 |
| 1966 | 6 | 5 | 0 | 0 | 2 | 2 | 0 | 0 | 284 | 40 |
| 1967 | 8 | 6 | 0 | 0 | 2 | 1 | 0 | 0 | 339 | 10 |
| 1968 | 7 | 7 | 0 | 1 | 1 | 0 | 1 | 1 | 290 | 10 |
| 1969 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 110 | 15 |
| 1970 | 6 | 8 | 2 | 1 | 2 | 0 | 0 | 0 | 286 | 45 |
| 1971 | 9 | 10 | 1 | 3 | 2 | 2 | 1 | 1 | 323 | 25 |
| 1972 | 8 | 6 | 0 | 0 | 1 | 1 | 0 | 0 | 288 | 20 |
| 1973 | 8 | 6 | 1 | 1 | 1 | 0 | 1 | 0 | 416 | 50 |
| 1974 | 12 | 10 | 0 | 0 | 2 | 1 | 1 | 0 | 525 | 20 |
| 1975 | 8 | 6 | 1 | 0 | 0 | 1 | 1 | 1 | 292 | 20 |
| 1976 | 6 | 6 | 0 | 0 | 1 | 2 | 0 | 0 | 351 | 30 |
| 1977 | 8 | 6 | 0 | 0 | 1 | 0 | 0 | 0 | 395 | 10 |
| 1978 | 8 | 9 | 1 | 1 | 3 | 2 | 0 | 0 | 462 | 10 |
| 1979 | 5 | 5 | 1 | 0 | 2 | 2 | 1 | 1 | 281 | 15 |
| 1980 | 10 | 8 | 0 | 0 | 1 | 1 | 0 | 0 | 414 | 5 |
| 1981 | 5 | 4 | 0 | 0 | 1 | 1 | 0 | 0 | 202 | 20 |
| 1982 | 7 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 247 | 35 |
| 1983 | 8 | 7 | 0 | 1 | 2 | 2 | 1 | 1 | 289 | 42 |
| 1984 | 6 | 6 | 0 | 0 | 1 | 0 | 0 | 0 | 280 | 2 |
| 1985 | 5 | 4 | 1 | 0 | 0 | 1 | 0 | 0 | 193 | 35 |
| 1986 | 6 | 7 | 0 | 1 | 1 | 0 | 0 | 0 | 305 | 0 |
| 1987 | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 165 | 45 |
| 1988 | 6 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 204 | 10 |
| 1989 | 7 | 8 | 0 | 0 | 2 | 2 | 0 | 0 | 306 | 10 |
| 1990 | 6 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 245 | 10 |
| 1991 | 8 | 6 | 0 | 0 | 1 | 1 | 0 | 0 | 349 | 55 |
| 1992 | 5 | 5 | 0 | 0 | 1 | 1 | 0 | 0 | 167 | 5 |
| 1993 | 8 | 9 | 0 | 0 | 2 | 4 | 0 | 0 | 325 | 40 |
| 1994 | 4 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 138 | 10 |
| 1995 | 8 | 6 | 2 | 2 | 1 | 1 | 0 | 0 | 348 | 50 |
| 1996 | 7 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 189 | 0 |
| 1997 | 2 | 3 | 0 | 1 | 1 | 0 | 1 | 0 | 97 | 30 |
| 1998 | 5 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 188 | 35 |
| 1999 | 10 | 13 | 4 | 3 | 2 | 0 | 2 | 1 | 520 | 0 |
| 2000 | 7 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 329 | 5 |
| 2001 | 6 | 6 | 1 | 1 | 2 | 1 | 0 | 0 | 253 | 35 |
| 2002 | 3 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 144 | 25 |
| 2003 | 4 | 5 | 1 | 1 | 1 | 1 | 1 | 0 | 158 | 0 |
| 2004 | 3 | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 77 | 35 |
| 2005 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 142 | 45 |
| 2006 | 10 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 317 | 50 |
| 2007 | 4 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 86 | 50 |
| 2008 | 8 | 9 | 2 | 2 | 3 | 2 | 1 | 0 | 347 | 0 |
| 2009 | 13 | 9 | 1 | 1 | 1 | 2 | 1 | 0 | 255 | 30 |
| 2010 | 8 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 220 | 0 |
| 2011 | 8 | 5 | 0 | 0 | 0 | 1 | 0 | 0 | 213 | 0 |
| 2012 | 9 | 7 | 0 | 0 | 2 | 3 | 1 | 1 | 252 | 45 |
| 2013 | 10 | 7 | 1 | 1 | 0 | 1 | 0 | 0 | 292 | 50 |
| 2014 | 6 | 3 | 0 | 0 | 0 | 1 | 0 | 0 | 145 | 45 |
| 2015 | 4 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 136 | 50 |
| 2016 | 11 | 7 | 2 | 2 | 0 | 0 | 0 | 0 | 283 | 0 |
| 2017 | 12 | 11 | 2 | 1 | 3 | 2 | 1 | 1 | 259 | 40 |
| Total | 418 | 348 | 29 | 35 | 63 | 52 | 21 | 14 | 16249 | 19 |
| Mean | 6.7 | 5.6 | 0.5 | 0.6 | 1.0 | 0.8 | 0.3 | 0.2 | 262 | 5 |