ValueAnomalyRankMean

Divisional Palmer Z-Index

October - December 1987

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Oregon (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -1.82

Anomaly: -1.72

Rank: 13th Driest

Mean: -0.10

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October - December 1987 Oregon Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Coastal Area	-0.68	-0.57	38	-0.11
2. Willamette Valley	-0.88	-0.80	28	-0.08
3. Southwestern Valleys	-0.92	-0.79	39	-0.13
4. Northern Cascades	-0.93	-0.84	27	-0.09
5. High Plateau	-1.51	-1.39	21	-0.11
6. North Central	-1.85	-1.86	11	0.01
7. South Central	-1.45	-1.42	20	-0.03
8. Northeast	-2.54	-2.57	4	0.03
9. Southeast	-1.16	-1.13	20	-0.03

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published March 2025, retrieved on March 27, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping