ValueAnomalyRankMean

Divisional Palmer Z-Index

August - October 1991

-4-3-2-11234

Washington (Hover over a Climate Division)

Z-IndexPalmer Z-Index:

Anomaly:

Rank:

Mean:

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August - October 1991 Washington Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. West Olympic Coast	0.24	0.30	87	-0.06
2. North East Olympic San Juan	-0.55	-0.56	42	0.01
3. Puget Sound Lowlands	-1.24	-1.13	23	-0.11
4. East Olympic Cascade Foothills	-1.42	-1.31	17	-0.11
5. Cascade Mountains West	-1.46	-1.36	17	-0.10
6. East Slope Cascades	-0.96	-0.92	23	-0.04
7. Okanogan Big Bend	-1.20	-1.13	18	-0.07
8. Central Basin	-1.01	-0.98	24	-0.03
9. Northeastern	-0.97	-0.90	34	-0.07
10. Palouse Blue Mountains	-0.94	-0.91	34	-0.03

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published June 2025, retrieved on June 17, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping