SPI

Category

Number of time in 45 years

Percentage of occurrence

Severity of events

≥2

Extremely wet

6

4.1%

1 in 7.5 years

1.5 - 1.99

Severely wet

11

7.5%

1 in 4.1years

1 - 1.49

Moderately wet

14

9.6%

1 in 3.2 years

0 - 0.99

Mild wetness

34

23.3%

1 in 1.3 years

0 to −0.99

Mild dryness

41

28.1%

1 in 1.1 years

−1 to−1.49

Moderately dry

23

15.8%

1 in 2.0 years

−1.5 to −1.99

Severely dry

13

8.9%

1 in 3.5 years

≤−2

Extremely dry

4

2.7%

1 in 11.3years

Total

146

100%