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Legend (OAR_OAP/Drought)

Average Change in Drought (5-year SPEI) in the Contiguous 48 states, 1900–2020 (0)
-2.75 – -2.5 -2.75 – -2.5
-2.5 – -2.25 -2.5 – -2.25
-2.25 – -2 -2.25 – -2
-2.0 – -1.75 -2.0 – -1.75
-1.75 – -1.5 -1.75 – -1.5
-1.5 – -1.25 -1.5 – -1.25
-1.25 – -1 -1.25 – -1
-1.0 – -0.75 -1.0 – -0.75
-0.75 – -0.5 -0.75 – -0.5
-0.5 – -0.25 -0.5 – -0.25
-0.25 – 0 -0.25 – 0
0 – 0.25 0 – 0.25
0.25 – 0.5 0.25 – 0.5
0.5 – 0.75 0.5 – 0.75
0.75 – 1 0.75 – 1
1 – 1.25 1 – 1.25
1.25 – 1.5 1.25 – 1.5
1.5 – 1.75 1.5 – 1.75
1.75 – 2 1.75 – 2
2 – 2.25 2 – 2.25
2.25 – 2.5 2.25 – 2.5
2.5 – 2.75 2.5 – 2.75
2.75 – 3 2.75 – 3