| D4 – Exceptional Drought (≤ -2.0) |
| D3 – Extreme Drought (-2.0 to -1.6) |
| D2 – Severe Drought (-1.6 to -1.3) |
| D1 – Moderate Drought (-1.3 to -0.8) |
| D0 – Abnormally Dry (-0.8 to -0.5) |
| Neutral (-0.5 to 0.5) |
| W0 – Abnormally Wet (0.5 to 0.8) |
| W1 – Moderate Wet (0.8 to 1.3) |
| W2 – Severe Wet (1.3 to 1.6) |
| W3 – Extreme Wet (1.6 to 2.0) |
| W4 – Exceptional Wet (> 2.0) |
