T. Number

Classification of
Cyclonic Disturbances

Wind Speed in Knots

Wind Speed in km/hours

T1.0

Low Pressure system (L)

< 17

<31

T1.5

Depression (D)

17-27

31-49

T2.0

Deep Depression (DD)

28-33

50-61

T2.5

Cyclonic Storm (CS)

34-47

62-88

T3.5

Severe Cyclonic Storm (SCS)

48-63

89-117

T4.0

Very Severe Cyclonic Storm (VSCS)

64-119

119-221

T6.5

Super Cyclonic Storm (SuCS)

> 120

>222