Value Anomaly Rank Mean

Divisional Palmer Z-Index

October - December 1911

-4-3-2-11234

Virginia (Hover over a Climate Division)

Z-Index Palmer Z-Index : 0.75

Anomaly: 0.86

Rank: 36th Wettest

Mean: -0.11

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*Signifies a tie

**Insufficient variability in the data record renders rank insignificant

October - December 1911 Virginia Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Tidewater	0.44	0.53	82	-0.09
2. Eastern Piedmont	0.82	0.96	101	-0.14
3. Western Piedmont	0.74	0.86	98	-0.12
4. Northern	0.30	0.46	82	-0.16
5. Central Mountain	1.07	1.16	100	-0.08
6. Southwestern Mountain	1.49	1.48	114	0.01

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on July 31, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping