ValueRankAnomalyMean

Divisional Palmer Z-Index

November 1930 - January 1931

-4-3-2-11234

Virginia (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -2.57

Rank: 4th Driest

Anomaly: -2.58

Mean: 0.01

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November 1930 - January 1931 Virginia Divisional Palmer Z-Index

Climate Division	Value	Rank 130 Years	Anomaly	1901-2000 Mean
1. Tidewater	-2.81	2	-2.75	-0.06
2. Eastern Piedmont	-2.30	4	-2.24	-0.06
3. Western Piedmont	-1.23	16	-1.24	0.02
4. Northern	-2.76	1	-2.75	-0.01
5. Central Mountain	-2.06	6	-2.18	0.13
6. Southwestern Mountain	-2.16	5	-2.27	0.12

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on July 12, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping