Date

13th

14th

15th

16th

17th

18th

19th

Subtropical high ridge (˚N)

24

23

22

24

27

28

30

Subtropical high west ridge point (˚E)

102

104

103

112

114

110

106

Subtropical high area index

87

86

80

53

53

83

89

Secondary high intensity index

223

256

243

165

146

176

217