ValueAnomalyRankMean

Divisional Palmer Z-Index

November 1930 - January 1931

-4-3-2-11234

Oregon (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -2.54

Anomaly: -2.51

Rank: 5th Driest

Mean: -0.03

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November 1930 - January 1931 Oregon Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Coastal Area	-1.53	-1.50	13	-0.03
2. Willamette Valley	-1.83	-1.80	9	-0.03
3. Southwestern Valleys	-1.76	-1.71	12	-0.05
4. Northern Cascades	-1.69	-1.64	10	-0.05
5. High Plateau	-2.63	-2.58	4	-0.05
6. North Central	-2.32	-2.38	15	0.06
7. South Central	-2.23	-2.24	12	0.01
8. Northeast	-2.24	-2.37	10	0.13
9. Southeast	-1.52	-1.55	17	0.02

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published March 2025, retrieved on March 31, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping