Value Anomaly Rank Mean

Divisional Palmer Z-Index

August - October 1908

-4-3-2-11234

Pennsylvania (Hover over a Climate Division)

Z-Index Palmer Z-Index : -2.60

Anomaly: -2.67

Rank: 2nd Driest

Mean: 0.07

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*Signifies a tie

**Insufficient variability in the data record renders rank insignificant

August - October 1908 Pennsylvania Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Pocono Mountains	-1.99	-2.04	6	0.04
2. East Central Mountains	-1.25	-1.34	23	0.09
3. Southeastern Piedmont	-0.83	-0.93	35	0.10
4. Lower Susquehanna	-1.10	-1.21	26	0.11
5. Middle Susquehanna	-1.60	-1.71	10	0.10
6. Upper Susquehanna	-2.28	-2.36	4	0.08
7. Central Mountains	-2.81	-2.85	2	0.04
8. South Central Mountains	-2.50	-2.51	4	0.01
9. Southwest Plateau	-2.77	-2.78	3	0.02
10. Northwest Plateau	-3.25	-3.29	2	0.04

Citing This Page

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