Periods of 2 or More Months of Severe or Extreme Drought
| Drought Periods | Duration | Lowest PDSI |
|---|---|---|
| 12/1899 - 1/1900 | 2 months | -3.32 in 12/1899 |
| 11/1908 - 1/1909 | 3 months | -3.55 in 12/1908 |
| 8/1910 - 9/1911 | 14 months | -4.96 in 5/1911 |
| 8/1912 - 12/1912 | 5 months | -3.60 in 11/1912 |
| 7/1913 - 9/1913 | 3 months | -3.79 in 8/1913 |
| 5/1915 - 6/1915 | 2 months | -3.33 in 6/1915 |
| 8/1923 - 9/1923 | 2 months | -3.47 in 9/1923 |
| 4/1925 - 6/1925 | 3 months | -3.16 in 4/1925 |
| 2/1930 - 4/1931 | 15 months | -4.24 in 10/1930 |
| 11/1931 - 12/1931 | 2 months | -3.30 in 12/1931 |
| 6/1957 - 11/1957 | 6 months | -4.16 in 11/1957 |
| 7/1962 - 10/1962 | 4 months | -3.22 in 7/1962 |
| 4/1963 - 6/1963 | 3 months | -3.46 in 5/1963 |
| 6/1964 - 11/1966 | 30 months | -5.34 in 7/1965 |
| 1/1967 - 2/1967 | 2 months | -3.46 in 1/1967 |
| 4/1985 - 5/1985 | 2 months | -3.39 in 4/1985 |
| 1/2002 - 4/2002 | 4 months | -3.53 in 2/2002 |
| Drought Periods | Duration | Lowest PDSI |
|---|---|---|
| 1/1901 - 2/1901 | 2 months | -3.97 in 2/1901 |
| 11/1909 - 12/1909 | 2 months | -3.28 in 12/1909 |
| 4/1910 - 9/1911 | 18 months | -5.20 in 5/1911 |
| 9/1912 - 2/1913 | 6 months | -3.66 in 11/1912 |
| 7/1913 - 9/1913 | 3 months | -3.97 in 8/1913 |
| 9/1914 - 12/1914 | 4 months | -3.62 in 11/1914 |
| 4/1915 - 6/1915 | 3 months | -3.98 in 6/1915 |
| 11/1924 - 6/1925 | 8 months | -4.01 in 4/1925 |
| 11/1929 - 4/1931 | 18 months | -4.77 in 9/1930 |
| 10/1931 - 2/1932 | 5 months | -4.35 in 12/1931 |
| 4/1932 - 7/1932 | 4 months | -3.41 in 5/1932 |
| 11/1949 - 1/1950 | 3 months | -3.52 in 12/1949 |
| 7/1957 - 11/1957 | 5 months | -3.68 in 9/1957 |
| 9/1964 - 1/1965 | 5 months | -4.01 in 11/1964 |
| 3/1965 - 10/1966 | 20 months | -4.40 in 8/1966 |
| 1/1967 - 2/1967 | 2 months | -3.17 in 2/1967 |
| 2/2002 - 4/2002 | 3 months | -3.28 in 2/2002 |
| Drought Periods | Duration | Lowest PDSI |
|---|---|---|
| 1/1901 - 2/1901 | 2 months | -3.79 in 2/1901 |
| 8/1910 - 7/1911 | 12 months | -4.30 in 7/1911 |
| 7/1913 - 9/1913 | 3 months | -3.68 in 8/1913 |
| 12/1924 - 6/1925 | 7 months | -3.64 in 6/1925 |
| 4/1930 - 3/1931 | 12 months | -4.26 in 9/1930 |
| 11/1949 - 1/1950 | 3 months | -3.13 in 12/1949 |
| 9/1964 - 1/1965 | 5 months | -4.16 in 11/1964 |
| 3/1965 - 2/1967 | 24 months | -5.19 in 12/1965 |
| 3/1985 - 4/1985 | 2 months | -3.84 in 4/1985 |
| 8/1995 - 9/1995 | 2 months | -3.61 in 8/1995 |
| 7/1999 - 8/1999 | 2 months | -3.50 in 7/1999 |
| 1/2002 - 4/2002 | 4 months | -3.67 in 2/2002 |
Based on the monthly Palmer Drought Severity Index as computed by the National Climatic Data Center.
Period of record: January 1895 through March 2006