ValueRankAnomalyMean

Divisional Palmer Z-Index

December 1918 - February 1919

-4-3-2-11234

Pennsylvania (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -0.36

Rank: 37th Driest

Anomaly: -0.46

Mean: 0.10

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December 1918 - February 1919 Pennsylvania Divisional Palmer Z-Index

Climate Division	Value	Rank 130 Years	Anomaly	1901-2000 Mean
1. Pocono Mountains	-0.51	43	-0.57	0.06
2. East Central Mountains	0.21	73	0.06	0.14
3. Southeastern Piedmont	0.21	79	0.09	0.12
4. Lower Susquehanna	0.38	87	0.27	0.11
5. Middle Susquehanna	-0.03	54	-0.17	0.14
6. Upper Susquehanna	-1.14	12	-1.16	0.02
7. Central Mountains	-0.83	22	-0.92	0.09
8. South Central Mountains	-0.44	41	-0.53	0.08
9. Southwest Plateau	-0.42	36	-0.53	0.11
10. Northwest Plateau	-0.91	17	-0.98	0.07

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published June 2025, retrieved on June 28, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping