Regional Time Series

Data Info Data Service
Please note, Degree Days are not available for Great Plains, Souther Plains and Gulf Coast, Rockies and Westward, River Basins, or Agricultural Belts. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales. Data are available for bulk download.
Base Period
Trend
Filter
Ohio Valley Palmer Z-Index
October-December
Period
Z-Index
Rank
(out of 130)
October-December 2024-1.3625
October-December 2023-2.1313
October-December 2022-1.0934
October-December 20210.8583
October-December 20200.3571
October-December 20191.79114
October-December 20182.35125
October-December 20170.2769
October-December 2016-1.2128
October-December 20152.05120
October-December 20141.49105
October-December 20131.1593
October-December 2012-0.4246
October-December 20111.67111
October-December 2010-1.0136
October-December 20092.82129
October-December 20080.7081
October-December 2007-0.3451
October-December 20061.63109
October-December 2005-2.0814
October-December 20042.23123
October-December 20031.46103
October-December 2002-0.0263
October-December 20011.62108
October-December 2000-0.6744
October-December 1999-2.775
October-December 1998-0.5445
October-December 1997-0.6943
October-December 19961.62108
October-December 1995-0.2454
October-December 1994-0.3948
October-December 19931.81115
October-December 19921.54106
October-December 19910.3672
October-December 19903.00130
October-December 1989-0.0560
October-December 19880.2970
October-December 1987-0.4047
October-December 19861.74112
October-December 19852.34124
October-December 19841.96119
October-December 19832.10122
October-December 19821.95118
October-December 19810.6077
October-December 1980-1.4823
October-December 19791.3198
October-December 19780.9586
October-December 19771.83116
October-December 1976-0.3152
October-December 19750.4874
October-December 19740.5375
October-December 19731.64110
October-December 19722.75128
October-December 1971-1.2029
October-December 19700.9888
October-December 19691.2195
October-December 19680.1365
October-December 19672.08121
October-December 1966-0.0659
October-December 1965-1.0335
October-December 1964-1.8117
October-December 1963-3.752
October-December 1962-0.8641
October-December 19611.1090
October-December 1960-1.2029
October-December 19590.9185
October-December 1958-0.8242
October-December 19571.75113
October-December 1956-2.0215
October-December 1955-1.1132
October-December 1954-0.1357
October-December 1953-4.261
October-December 1952-2.2212
October-December 19511.84117
October-December 19500.1867
October-December 19490.9687
October-December 19480.8382
October-December 1947-1.6222
October-December 1946-0.1158
October-December 19450.5976
October-December 1944-2.3310
October-December 1943-2.2711
October-December 19421.49105
October-December 19411.1291
October-December 1940-1.8018
October-December 1939-2.914
October-December 1938-1.7520
October-December 19370.1867
October-December 1936-0.3649
October-December 1935-0.1656
October-December 1934-1.3625
October-December 1933-2.399
October-December 19321.1492
October-December 1931-0.2055
October-December 1930-3.073
October-December 19291.2897
October-December 19280.4773
October-December 19271.43100
October-December 19262.65127
October-December 19251.46103
October-December 1924-1.1132
October-December 19230.6780
October-December 1922-1.6521
October-December 19210.6679
October-December 1920-1.1531
October-December 19192.47126
October-December 19180.2568
October-December 1917-0.8739
October-December 1916-1.2927
October-December 19151.4199
October-December 1914-1.4724
October-December 1913-1.0037
October-December 1912-0.9638
October-December 19111.2296
October-December 1910-0.0560
October-December 19090.1264
October-December 1908-2.716
October-December 19070.6378
October-December 19060.9185
October-December 19051.45101
October-December 1904-2.428
October-December 1903-0.8739
October-December 19021.0489
October-December 1901-2.437
October-December 1900-0.3152
October-December 1899-2.0215
October-December 18981.2094
October-December 1897-1.7719
October-December 1896-0.0462
October-December 1895-0.3649

Citing This Page