ValueAnomalyRankMean

Divisional Palmer Z-Index

October - December 1917

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Pennsylvania (Hover over a Climate Division)

Z-IndexPalmer Z-Index: 0.45

Anomaly: 0.52

Rank: 54th Wettest

Mean: -0.07

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October - December 1917 Pennsylvania Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Pocono Mountains	-0.02	0.03	62	-0.05
2. East Central Mountains	0.03	0.05	61	-0.02
3. Southeastern Piedmont	0.36	0.39	70	-0.03
4. Lower Susquehanna	0.59	0.66	85	-0.07
5. Middle Susquehanna	0.58	0.65	83	-0.08
6. Upper Susquehanna	0.47	0.56	80	-0.09
7. Central Mountains	0.37	0.47	78	-0.10
8. South Central Mountains	-0.17	-0.07	63	-0.10
9. Southwest Plateau	0.23	0.26	69	-0.03
10. Northwest Plateau	1.05	1.09	101	-0.04

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published March 2025, retrieved on April 2, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping