Value Anomaly Rank Mean

Divisional Palmer Z-Index

July - September 1915

-4-3-2-11234

Pennsylvania (Hover over a Climate Division)

Z-Index Palmer Z-Index : --

Anomaly: --

Rank: -- Driest

Mean: --

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*Signifies a tie

**Insufficient variability in the data record renders rank insignificant

July - September 1915 Pennsylvania Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Pocono Mountains	1.80	1.81	117	-0.01
2. East Central Mountains	1.82	1.79	117	0.03
3. Southeastern Piedmont	1.94	1.88	118	0.06
4. Lower Susquehanna	2.14	1.95	118	0.20
5. Middle Susquehanna	2.66	2.56	122	0.10
6. Upper Susquehanna	3.04	2.94	122	0.10
7. Central Mountains	1.28	1.27	104	0.01
8. South Central Mountains	0.23	0.21	71	0.02
9. Southwest Plateau	0.32	0.34	75	-0.01
10. Northwest Plateau	1.87	1.87	115	0.00

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