ValueRankAnomalyMean

Divisional Palmer Z-Index

November 1910 - January 1911

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Wyoming (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -0.78

Rank: 36th Driest

Anomaly: -0.86

Mean: 0.08

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November 1910 - January 1911 Wyoming Divisional Palmer Z-Index

Climate Division	Value	Rank 130 Years	Anomaly	1901-2000 Mean
1. Yellowstone Drainage	0.27	76	0.18	0.09
2. Snake Drainage	0.78	102	0.85	-0.07
3. Green and Bear Drainage	-0.76	44	-0.64	-0.11
4. Big Horn	-0.60	40	-0.67	0.07
5. Powder, Little Mo and Tongue Drainages	-0.80	29	-0.92	0.12
6. Belle Fourche Drainage	-0.85	19	-1.09	0.24
7. Cheyenne Niobrara Drainage	-0.55	31	-0.70	0.14
8. Lower Platte	-0.92	20	-1.07	0.15
9. Wind River	-0.81	28	-0.85	0.04
10. Upper Platte	-0.74	34	-0.77	0.04

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on July 12, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping