Tropical storm
intensity
Hurricane intensity Intense
hurricane intensity
Tropical Cyclone Basin Average (S.D.) % of total Average (S.D.) % of total Average (S.D.) % of total
Atlantic (1944-95) 9.8 (3.0) 11.4% 5.7 (2.2) 12.1% 2.2 (1.5) 10.9%
Northeast Pacific (1970-95) 17.0 (4.4) 19.7% 9.8 (3.1) 20.7% 4.6 (2.5) 22.9%
Northwest Pacific (1970-95) 26.9 (4.1) 32.1% 16.8 (3.6) 35.5% 8.3 (3.2) 41.3%
North Indian (1970-95)5.4 (2.2) 6.3% 2.2 (1.8) 4.6% 0.3 (0.5) 1.5%
Southwest Indian ( < 100 E) (1969/70-94/95) 10.3 (2.9) 12.0% 4.9 (2.4) 10.4% 1.8 (1.9) 9.0%
Australian/S.E. Indian (100-142 E) (1969/70-94/95) 6.5 (2.6) 7.5% 3.3 (1.9) 7.0% 1.2 (1.4) 6.0%
Australian/S.W. Pacific ( > 142 E) (1969/70-94/95) 10.2 (3.1) 11.8% 4.6 (2.4) 9.7% 1.7 (1.9) 8.5%
Global (1970-95) 86.1 (8.0) 47.3 (6.5) 20.1 (5.7)

Table 1: Average, standard deviation and percent of global total of the number of tropical storms (winds at least 18 m s-1), hurricane-force tropical cyclones (winds at least 33 m s-1), and intense hurricane-force tropical cyclones (winds at least 50 m s-1). The first value provides the long-term average from reliable records, the second value (in the parenthesis) is the corresponding standard deviation, and the third is the percentage of the global total. Dates in parentheses provide the nominal years for which accurate records are currently available.