39
Table 2.2 Tropical cyclone classifications (all winds are 10-minute averages)
Beaufort
scale
10-minute
sustained winds
(knots)
N Indian Ocean
IMD
SW Indian Ocean
MF
Australia BOM
SW Pacific
FMS
NW Pacific
JMA
NW Pacific
JTWC
NE Pacific & N
Atlantic NHC, CHC
& CPHC
0–6
7
<28
Depression
Trop.
Disturbance
Tropical low
Tropical
depression
Tropical
depression
Tropical
depression
Tropical depression
28–29
30–33
Deep depression Depression
8–9
34–47
Cyclonic storm Moderate tropical
storm
Trop. Cyclone
(1)
Tropical
cyclone
Tropical
storm
Tropical
storm
Tropical storm
10
11
48–55
56–63
Severe cyclonic
storm
Severe tropical
storm
Tropical
Cyclone (2)
Severe
tropical storm
Hurricane (1)
12
64–72
73–85
Tropical cyclone Severe
Tropical
Cyclone (3)
Typhoon
Hurricane (2)
86–89
90–99
Very severe
cyclonic storm
Intense tropical
cyclone
Severe
Tropical
Cyclone (4)
Typhoon
Major Hurricane (3)
100–106
Major Hurricane (4)
107–114
Severe
Tropical
Cyclone (5)
115–119
Very intense
tropical cyclone
Super
typhoon
>120
Super cyclonic
storm
Major Hurricane (5)
Types of Tropical Cyclones