Table 1: Drought classification based on SPI [6].

SPI valuesClass

>2 Extremely wet
1.5–1.99 Very wet
1.0–1.49 Moderately wet
−0.99 to 0.99 Near normal
−1 to −1.49 Moderately dry
−1.5 to −1.99 Very dry
−2Extremely dry