CATEGORIES

DESCRIPTION

SPI VALUES

D0

No Drought

−0.5 and above

D1

Abnormally dry

−0.5 - −0.7

D2

Moderate Drought

−0.8 - −1.2

D3

Severe Drought

−1.3 - −1.5

D4

Extreme Drought

−1.6 - −1.9

D5

Exceptional Drought

−2 or less