ValueAnomalyRankMean

Divisional Palmer Z-Index Anomaly

November 1998 - January 1999

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Pennsylvania (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -1.48

Anomaly: -1.49

Rank: 12th Driest

Mean: 0.01

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November 1998 - January 1999 Pennsylvania Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Pocono Mountains	-0.56	-0.52	47	-0.04
2. East Central Mountains	-0.42	-0.42	51	0.00
3. Southeastern Piedmont	-1.42	-1.39	17	-0.03
4. Lower Susquehanna	-2.09	-2.10	6	0.01
5. Middle Susquehanna	-1.43	-1.46	15	0.03
6. Upper Susquehanna	-0.74	-0.72	34	-0.02
7. Central Mountains	-0.94	-0.96	25	0.02
8. South Central Mountains	-2.52	-2.54	4	0.02
9. Southwest Plateau	-1.09	-1.16	18	0.07
10. Northwest Plateau	-0.93	-0.98	21	0.05

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published April 2025, retrieved on April 12, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping