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The US Gridded Standardized Precipitation Index (SPI) is derived from the nClimGrid-Daily dataset and and includes timescales of 1, 2, and 3 weeks, as well as 1, 2, 3, 4, 6, 9, and 12 months.

The United States Gridded Standardized Precipitation Evapotranspiration Index (SPEI) is derived from the nClimGrid-Monthl

The US Gridded Standardized Precipitation Index (SPI) is derived from the nClimGrid-Daily dataset and and includes timescales of 1, 2, and 3 weeks, as well as 1, 2, 3, 4, 6, 9, and 12 months.

The US Gridded Standardized Precipitation Index (SPI) is derived from the nClimGrid-Monthly dataset and includes timescales of 1, 2, 3, 6, 9, 12, 24, 36, 48, 60 and 72 months.