ValueRankAnomalyMean

Palmer Drought Severity Index

September 1947

-4-3-2-11234

Climate Regions (Hover over a Climate Region)

PDSIPalmer Drought Severity Index (PDSI):

Rank:

Anomaly:

Mean:

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September 1947 Climate Regions Regional Palmer Drought Severity Index

Climate Region	Value	Rank 130 Years	Anomaly	1901-2000 Mean
Northeast	-1.17	44	-1.27	0.10
Upper Midwest	-1.50	31	-1.73	0.23
Ohio Valley	-0.70	49	-0.81	0.11
Southeast	2.08	107	2.15	-0.07
Northern Rockies and Plains	4.04	106	3.22	0.82
South	-1.95	28	-2.00	0.05
Southwest	-1.74	39	-2.19	0.45
Northwest	0.91	91	0.94	-0.03
West	-2.15	32	-2.27	0.12

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Regional Mapping, published July 2025, retrieved on July 13, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/mapping