ValueAnomalyRankMean

Divisional Palmer Z-Index

October - December 1957

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Pennsylvania (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -0.77

Anomaly: -0.70

Rank: 34th Driest

Mean: -0.07

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October - December 1957 Pennsylvania Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Pocono Mountains	0.53	0.57	86	-0.05
2. East Central Mountains	0.58	0.60	87	-0.02
3. Southeastern Piedmont	-0.19	-0.16	53	-0.03
4. Lower Susquehanna	0.18	0.25	71	-0.07
5. Middle Susquehanna	-0.17	-0.09	57	-0.08
6. Upper Susquehanna	-0.67	-0.58	33	-0.09
7. Central Mountains	-1.40	-1.30	22	-0.10
8. South Central Mountains	-0.58	-0.48	41	-0.10
9. Southwest Plateau	-0.69	-0.66	35	-0.03
10. Northwest Plateau	-0.76	-0.71	29	-0.04

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published March 2025, retrieved on March 25, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping