 |
|
|
|
|
|
TD: Tropical Depression
TS: Tropical Storm
T1 - T2: Typhoon
H1 - H2: Hurricane
T3 - T4: Intense Typhoon
H3 - H5: Intense Hurricane
T5: Super Typhoon
Tropical Depression
tropical cyclone system with definite anti-clockwise wind circulation with maximum sustained winds of below 39mph (61kph); the system is given a number
Tropical Storm
tropical cyclone with maximum average windspeeds above 39mph (61kph) and assigned a name
Typhoon
tropical cyclone with maximum average windspeeds above 74mph (119 kph) in the NW Pacific (including the Philippines) W of the dateline
Hurricane
tropical cyclone with maximum average windspeeds above 74mph (119kph) in the North Atlantic, NE Pacific (E of the dateline) and S Pacific (E of 160E)
Intense Typhoon
having intense hurricane (of Saffir-Simpson category and above) wind status
Intense Hurricane
four 6-hour periods during which a tropical cyclone sustains (intense) hurricane intensity wind status
Super Typhoon
typhoon that reaches maximum sustained 1-minute surface winds of at least 150mph (234kph). This is the equivalent of a strong Saffir-Simpson category 4 or 5 hurricane in the Atlantic or NE Pacific. This term is used by the US Joint Typhoon Warning Centre in Guam.
Unit conversions
Windspeeds from meteorological agancies are usually given in knots. Conversion to other units is as follows:
1 knot = 1.151 mph, 1.852 kmh or 0.514 metres per second
|
| |
|
|
|