Value Anomaly Rank Mean

Divisional Palmer Z-Index Rank (130 years)

November 1902 - January 1903

Driest⇣⅒⇣ ⅓Near Normal⇡ ⅓⇡⅒Wettest

Washington (Hover over a Climate Division)

Z-Index Palmer Z-Index : --

Anomaly: --

Rank: -- Driest

Mean: --

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*Signifies a tie

**Insufficient variability in the data record renders rank insignificant

November 1902 - January 1903 Washington Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. West Olympic Coast	1.50	1.52	124	-0.01
2. North East Olympic San Juan	0.91	0.86	85	0.05
3. Puget Sound Lowlands	1.42	1.47	108	-0.04
4. East Olympic Cascade Foothills	1.85	1.86	122	-0.01
5. Cascade Mountains West	1.73	1.76	123	-0.03
6. East Slope Cascades	2.10	2.11	124	-0.01
7. Okanogan Big Bend	2.29	2.29	122	0.00
8. Central Basin	1.43	1.37	108	0.06
9. Northeastern	2.00	2.13	122	-0.13
10. Palouse Blue Mountains	3.65	3.58	128	0.07

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published August 2025, retrieved on August 14, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping