Value Anomaly Rank Mean

Divisional Palmer Z-Index

August - October 1940

-4-3-2-11234

Oregon (Hover over a Climate Division)

Z-Index Palmer Z-Index : 0.84

Anomaly: 0.87

Rank: 22nd Wettest

Mean: -0.03

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*Signifies a tie

**Insufficient variability in the data record renders rank insignificant

August - October 1940 Oregon Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Coastal Area	-0.06	0.03	72	-0.09
2. Willamette Valley	0.18	0.25	79	-0.07
3. Southwestern Valleys	0.83	0.89	110	-0.06
4. Northern Cascades	0.24	0.30	83	-0.05
5. High Plateau	0.55	0.55	94	0.01
6. North Central	0.70	0.73	102	-0.02
7. South Central	1.28	1.22	117	0.05
8. Northeast	2.00	2.06	125	-0.06
9. Southeast	2.72	2.74	130	-0.01

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on July 22, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping