Extremely Dry(<= -2)
Severely Dry (-1.99 to -1.5)
Moderately Dry (-1.49 to -1.0)
Mildly Dry (-0.99 to 0)
Mildly Wet (0 to 0.99)
Moderately Wet (1.0 to 1.49)
Severely Wet (1.5 to 1.99)
Extremely Wet(>= 2)
No Data