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Monitoring of precipitation anomalies on multiple time scales
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The six maps above show spatial patterns of SPI for six different periods ranging from one month to 48 months, according to the selected year and month.

labelSPI1SPI3SPI6SPI12SPI24SPI48
monthly scale136122448


Clasification of SPI values:

SPI ValuesCategory
>= 2.0Extremely Wet
1.5 to 1.99Severely Wet
1.0 to 1.49Moderately Wet
-0.99 to 0.99Near Normal
-1.0 to -1.49Moderately Dry
-1.5 to -1.99Severely Dry
<= -2.0Extremely Dry

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