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Table 2

Classification of drought based on the SPI

SPI valuesClassSPI valuesClass
>2 Extremely wet −1 to −1.49 Moderately dry 
1.5–1.99 Very wet −1.5 to −1.99 Severely dry 
1.0–1.49 Moderately wet <− 2 Extremely dry 
−0.99 to 0.99 Near normal   
SPI valuesClassSPI valuesClass
>2 Extremely wet −1 to −1.49 Moderately dry 
1.5–1.99 Very wet −1.5 to −1.99 Severely dry 
1.0–1.49 Moderately wet <− 2 Extremely dry 
−0.99 to 0.99 Near normal   
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