Value Anomaly Rank Mean

Palmer Drought Severity Index

September 1940

-4-3-2-11234

Climate Regions (Hover over a Climate Region)

PDSI Palmer Drought Severity Index (PDSI) : --

Anomaly: --

Rank: -- Driest

Mean: --

Text Labels

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*Signifies a tie

**Insufficient variability in the data record renders rank insignificant

September 1940 Climate Regions Palmer Drought Severity Index

Climate Region	Value	Anomaly	Rank 130 Years	1901-2000 Mean
Northeast	-0.38	-0.48	55	0.10
Upper Midwest	-0.97	-1.20	45	0.23
Ohio Valley	-3.13	-3.24	10	0.11
Southeast	-0.40	-0.33	64	-0.07
Northern Rockies and Plains	-5.48	-6.30	7	0.82
South	1.47	1.42	90	0.05
Southwest	0.94	0.49	89	0.45
Northwest	-2.45	-2.42	23	-0.03
West	0.44	0.32	87	0.12

Citing This Page

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