Value Anomaly Rank Mean

Divisional Palmer Z-Index

August - October 1901

-4-3-2-11234

Oregon (Hover over a Climate Division)

Z-Index Palmer Z-Index : 0.36

Anomaly: 0.39

Rank: 39th Wettest

Mean: -0.03

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*Signifies a tie

**Insufficient variability in the data record renders rank insignificant

August - October 1901 Oregon Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Coastal Area	0.61	0.70	97	-0.09
2. Willamette Valley	0.30	0.37	81	-0.07
3. Southwestern Valleys	0.75	0.81	106	-0.06
4. Northern Cascades	0.26	0.31	84	-0.05
5. High Plateau	0.70	0.70	103	0.01
6. North Central	0.36	0.39	89	-0.02
7. South Central	0.62	0.57	101	0.05
8. Northeast	-0.53	-0.47	53	-0.06
9. Southeast	-0.03	-0.01	72	-0.01

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on August 4, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping