ValueRankAnomalyMean

Palmer Drought Severity Index

September 1987

-4-3-2-11234

Climate Regions (Hover over a Climate Region)

PDSIPalmer Drought Severity Index (PDSI):

Rank:

Anomaly:

Mean:

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September 1987 Climate Regions Regional Palmer Drought Severity Index

Climate Region	Value	Rank 130 Years	Anomaly	1901-2000 Mean
Northeast	0.98	76	0.88	0.10
Upper Midwest	-1.91	22	-2.14	0.23
Ohio Valley	-2.21	20	-2.32	0.11
Southeast	-2.10	30	-2.03	-0.07
Northern Rockies and Plains	-0.66	49	-1.48	0.82
South	3.18	115	3.13	0.05
Southwest	2.62	107	2.17	0.45
Northwest	-2.53	20	-2.50	-0.03
West	-3.47	19	-3.59	0.12

Citing This Page

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