Table 1. Classifications of Palmer Drought Severity Index.

Value Classifications of Palmer Drought Severity Index
4.0 or more Extremely wet
3.0 to 3.99 Very wet
2.0 to 2.99 Moderately wet
1.0 to 1.99 Slightly wet
0.5 to 0.99 Incipient wet spell
0.49 to -0.49 Near normal
-0.5 to -0.99 Incipient dry spell
-1.0 to -1.99 Mild drought
-2.0 to -2.99 Moderate drought
-3.0 to -3.99 Severe drought
-4.0 or less Extreme drought