ValueRankAnomalyMean

Divisional Palmer Z-Index

October - December 1897

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Wyoming (Hover over a Climate Division)

Z-IndexPalmer Z-Index:

Rank:

Anomaly:

Mean:

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October - December 1897 Wyoming Divisional Palmer Z-Index

Climate Division	Value	Rank 130 Years	Anomaly	1901-2000 Mean
1. Yellowstone Drainage	2.48	124	2.41	0.07
2. Snake Drainage	2.11	123	2.20	-0.10
3. Green and Bear Drainage	0.66	100	0.72	-0.06
4. Big Horn	0.98	104	0.85	0.13
5. Powder, Little Mo and Tongue Drainages	-0.25	52	-0.46	0.21
6. Belle Fourche Drainage	-0.34	41	-0.67	0.33
7. Cheyenne Niobrara Drainage	-0.25	47	-0.50	0.25
8. Lower Platte	-0.11	56	-0.41	0.30
9. Wind River	0.60	89	0.52	0.08
10. Upper Platte	-0.33	50	-0.46	0.13

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on July 13, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping