Divisional Mapping
Divisional Palmer Z-Index
October - December 1916
-4-3-2-11234
Wyoming (Hover over a Climate Division)
Z-Index
Palmer Z-Index
:
--
Anomaly:
--
Rank:
-- Driest
Mean:
--

*Signifies a tie
**Insufficient variability in the data record renders rank insignificant
Climate Division
|
Value | Anomaly | Rank 130 Years | 1901- |
---|---|---|---|---|
1. Yellowstone Drainage | 1.19 | 1.12 | 98 | 0.07 |
2. Snake Drainage | 0.41 | 0.51 | 86 | -0.10 |
3. Green and Bear Drainage | 0.38 | 0.45 | 91 | -0.06 |
4. Big Horn | 1.01 | 0.88 | 107 | 0.13 |
5. Powder, Little Mo and Tongue Drainages | 1.48 | 1.27 | 116 | 0.21 |
6. Belle Fourche Drainage | 1.94 | 1.61 | 116 | 0.33 |
7. Cheyenne Niobrara Drainage | 0.97 | 0.72 | 104 | 0.25 |
8. Lower Platte | 1.18 | 0.88 | 107 | 0.30 |
9. Wind River | 0.48 | 0.40 | 84 | 0.08 |
10. Upper Platte | 1.15 | 1.02 | 104 | 0.13 |
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on July 29, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping