ValueAnomalyRankMean

Divisional Palmer Z-Index

August - October 1991

-4-3-2-11234

Pennsylvania (Hover over a Climate Division)

Z-IndexPalmer Z-Index:

Anomaly:

Rank:

Mean:

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August - October 1991 Pennsylvania Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Pocono Mountains	-1.25	-1.30	22	0.04
2. East Central Mountains	-1.09	-1.18	29	0.09
3. Southeastern Piedmont	-0.88	-0.98	33	0.10
4. Lower Susquehanna	-1.02	-1.13	27	0.11
5. Middle Susquehanna	-1.47	-1.58	15	0.10
6. Upper Susquehanna	-2.01	-2.09	7	0.08
7. Central Mountains	-1.82	-1.86	11	0.04
8. South Central Mountains	-2.59	-2.60	3	0.01
9. Southwest Plateau	-2.94	-2.96	2	0.02
10. Northwest Plateau	-2.45	-2.49	3	0.04

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published April 2025, retrieved on April 10, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping