Value Anomaly Rank Mean

Divisional Palmer Z-Index

November 1959 - January 1960

-4-3-2-11234

Oregon (Hover over a Climate Division)

Z-Index Palmer Z-Index : -2.61

Anomaly: -2.58

Rank: 4th Driest

Mean: -0.03

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*Signifies a tie

**Insufficient variability in the data record renders rank insignificant

November 1959 - January 1960 Oregon Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Coastal Area	-1.94	-1.91	7	-0.03
2. Willamette Valley	-2.20	-2.17	7	-0.03
3. Southwestern Valleys	-1.69	-1.63	13	-0.05
4. Northern Cascades	-2.17	-2.12	4	-0.05
5. High Plateau	-2.75	-2.70	3	-0.05
6. North Central	-3.35	-3.40	4	0.06
7. South Central	-2.78	-2.79	4	0.01
8. Northeast	-1.60	-1.73	17	0.13
9. Southeast	-1.55	-1.58	16	0.02

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on July 28, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping