Drought/wet severity

SPEI values

Extremely wet

≥2

Severely wet

1.5 to 1.99

Moderately wet

1 to 1.49

Mildly wet

0.5 to 0.99

Normal

−0.49 to 0.49

Mild drought

−0.99 to −0.5

Moderate drought

−1.49 to −1

Severe drought

−1.99 to −1.5

Extreme drought

≤2