Latest Custom Drought Score
Score from -5 to +5. Blue means relief, red means drought stress.
Offline fixed version. Latest month: 2025-12. Cross-scale is -5 to +5; blue means lower drought risk or wet/cool relief, red means elevated drought risk. Multiplier translation is 2^(score).
Each box is standardized by calendar month. The atmospheric demand proxy is 0.60*z_vpdmax + 0.25*z_tmean + 0.15*z_soltotal. The water budget anomaly is z_ppt - ev_demand_z. Persistence is added, then the final drought score is log-scaled and capped from -5 to +5.
Score from -5 to +5. Blue means relief, red means drought stress.
This uses log2(multiplier), so +1 means 2x and +5 means 32x.
Squares more prone to heat-amplified drought across severe-drought months.
Squares where unusual solar/clear-sky conditions tend to contribute strongly.
Squares where lack of precipitation is the dominant drought ingredient.
Squares where atmospheric demand/VPD is a bigger driver.
Average severe-drought tendency across the record.
Monthly statewide mean custom drought score.
Latest score grouped into 1000-foot elevation bands.
Worst statewide months by the standardized custom drought score.
| region | date | mean_score | mean_standard_score | mean_multiplier | dominant_driver |
|---|---|---|---|---|---|
| Central | 1963-10 | 3.034 | 2.121 | 8.239 | heat-clear |
| Central | 1941-04 | 2.987 | 1.812 | 7.993 | heat-clear |
| Central | 1998-12 | 2.861 | 1.692 | 7.540 | heat-clear |
| Central | 1931-11 | 2.818 | 1.529 | 7.298 | heat-clear |
| Central | 1910-03 | 2.780 | 2.040 | 6.911 | heat-clear |
| Central_North | 1963-10 | 3.135 | 2.235 | 8.847 | heat-clear |
| Central_North | 1947-10 | 3.039 | 1.897 | 8.270 | heat-clear |
| Central_North | 1941-04 | 2.912 | 1.747 | 7.615 | heat-clear |
| Central_North | 1910-03 | 2.772 | 2.039 | 6.861 | heat-clear |
| Central_North | 1998-12 | 2.770 | 1.582 | 6.988 | heat-clear |
| Central_South | 1963-10 | 3.106 | 2.085 | 8.740 | heat-clear |
| Central_South | 1941-04 | 2.945 | 1.811 | 7.754 | heat-clear |
| Central_South | 1998-12 | 2.941 | 1.744 | 8.008 | heat-clear |
| Central_South | 2002-02 | 2.940 | 1.531 | 7.934 | heat-clear |
| Central_South | 1910-03 | 2.824 | 2.065 | 7.130 | heat-clear |
| North | 1963-10 | 3.168 | 2.244 | 9.032 | heat-clear |
| North | 1947-10 | 3.154 | 2.012 | 8.945 | heat-clear |
| North | 1991-06 | 2.864 | 1.638 | 7.388 | heat-clear |
| North | 1910-03 | 2.798 | 2.073 | 6.980 | heat-clear |
| North | 1998-12 | 2.789 | 1.574 | 6.986 | heat-clear |
| South | 2002-02 | 3.151 | 1.665 | 9.188 | heat-clear |
| South | 1963-10 | 2.999 | 1.981 | 8.117 | heat-clear |
| South | 1998-12 | 2.959 | 1.703 | 8.020 | heat-clear |
| South | 1910-03 | 2.840 | 2.033 | 7.213 | heat-clear |
| South | 2001-11 | 2.750 | 1.529 | 7.015 | heat-clear |
| date | mean_score | mean_standard_score | mean_multiplier | dominant_driver |
|---|---|---|---|---|
| 1963-10 | 3.088 | 2.133 | 8.595 | heat-clear |
| 1998-12 | 2.864 | 1.659 | 7.509 | heat-clear |
| 1941-04 | 2.860 | 1.724 | 7.376 | heat-clear |
| 1947-10 | 2.833 | 1.712 | 7.262 | heat-clear |
| 1910-03 | 2.803 | 2.050 | 7.019 | heat-clear |
| 1931-11 | 2.664 | 1.438 | 6.568 | heat-clear |
| 2002-02 | 2.655 | 1.361 | 6.823 | heat-clear |
| 1911-05 | 2.602 | 1.663 | 6.116 | heat-clear |
| 2012-03 | 2.599 | 1.459 | 6.390 | heat-clear |
| 1991-06 | 2.590 | 1.400 | 6.222 | heat-clear |
| elev_band | box_count | mean_drought_score | mean_standard_score | mean_multiplier |
|---|---|---|---|---|
| 0-999 | 721 | 0.358 | 0.127 | 1.379 |
| 1000-1999 | 1588 | -0.210 | -0.113 | 0.975 |
| 2000-2999 | 175 | -0.098 | -0.058 | 1.045 |
| 3000+ | 0 | NaN | NaN | NaN |