Dvorak热带气旋强度图示和标注

Dvorak T-Number and Corresponding Intensity^[2]

T-Number

1-min Winds

Category (SSHWS)

Min. Pressure (millibars)

(knots)

(mph)

(km/h)

Atlantic

NW Pacific

1.0 – 1.5

25

29

46

TD

----

----

2.0

30

35

56

TD

1009

1000

2.5

35

40

65

TS

1005

997

3.0

45

52

83

TS

1000

991

3.5

55

63

102

TS

994

984

4.0

65

75

120

Cat 1

987

976

4.5

77

89

143

Cat 1–Cat 2

979

966

5.0

90

104

167

Cat 2

970

954

5.5

102

117

189

Cat 3

960

941

6.0

115

132

213

Cat 4

948

927

6.5

127

146

235

Cat 4

935

914

7.0

140

161

260

Cat 5

921

898

7.5

155

178

287

Cat 5

906

879

8.0

170

196

315

Cat 5

890

858

8.5

185

213

343

Cat 5

873

841

Note: The pressures shown for the NW Pacific basin are lower as the pressure of the entire basin are relatively lower than that of the Atlantic basin.^[3]
Values of 8.1–8.5 are only assigned by the CIMSS and NOAA automated advanced Dvorak systems and not used in subjective analyses.^[4]