ValueAnomalyRankMean

Divisional Palmer Z-Index

October - December 1918

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Oregon (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -1.24

Anomaly: -1.15

Rank: 31st Driest

Mean: -0.10

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October - December 1918 Oregon Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Coastal Area	-0.97	-0.86	23	-0.11
2. Willamette Valley	-1.07	-0.99	20	-0.08
3. Southwestern Valleys	-1.21	-1.08	16	-0.13
4. Northern Cascades	-1.13	-1.04	21	-0.09
5. High Plateau	-0.93	-0.82	41	-0.11
6. North Central	-0.91	-0.92	37	0.01
7. South Central	-0.91	-0.88	41	-0.03
8. Northeast	-0.63	-0.66	49	0.03
9. Southeast	-0.77	-0.74	39	-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