ValueRankAnomalyMean

Divisional Palmer Z-Index Anomaly

December 1990 - February 1991

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Oregon (Hover over a Climate Division)

Z-IndexPalmer Z-Index:

Rank:

Anomaly:

Mean:

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December 1990 - February 1991 Oregon Divisional Palmer Z-Index

Climate Division	Value	Rank 130 Years	Anomaly	1901-2000 Mean
1. Coastal Area	-1.98	8	-1.94	-0.04
2. Willamette Valley	-2.00	10	-1.95	-0.05
3. Southwestern Valleys	-2.39	4	-2.36	-0.04
4. Northern Cascades	-1.51	12	-1.44	-0.07
5. High Plateau	-2.96	2	-2.98	0.02
6. North Central	-2.71	8	-2.78	0.07
7. South Central	-3.40	2	-3.48	0.08
8. Northeast	-2.18	8	-2.29	0.11
9. Southeast	-2.75	2	-2.87	0.12

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on July 19, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping