Periods of 2 or More Months of Severe or Extreme Drought
| Drought Periods | Duration | Lowest PDSI |
|---|---|---|
| 11/1899 - 12/1899 | 2 months | -3.27 in 12/1899 |
| 11/1908 - 1/1909 | 3 months | -4.17 in 12/1908 |
| 7/1910 - 9/1911 | 15 months | -4.82 in 5/1911 |
| 8/1913 - 9/1913 | 2 months | -3.29 in 8/1913 |
| 4/1915 - 6/1915 | 3 months | -3.48 in 6/1915 |
| 8/1930 - 5/1931 | 10 months | -4.17 in 4/1931 |
| 4/1941 - 6/1941 | 3 months | -3.35 in 4/1941 |
| 10/1957 - 11/1957 | 2 months | -3.19 in 10/1957 |
| 6/1962 - 9/1962 | 4 months | -3.54 in 7/1962 |
| 7/1963 - 12/1963 | 6 months | -4.08 in 10/1963 |
| 5/1964 - 9/1966 | 29 months | -5.84 in 11/1964 |
| 4/1985 - 5/1985 | 2 months | -3.32 in 4/1985 |
| Drought Periods | Duration | Lowest PDSI |
|---|---|---|
| 11/1899 - 1/1900 | 3 months | -3.69 in 12/1899 |
| 11/1908 - 1/1909 | 3 months | -3.38 in 12/1908 |
| 11/1909 - 12/1909 | 2 months | -3.24 in 11/1909 |
| 3/1910 - 9/1911 | 19 months | -5.36 in 5/1911 |
| 9/1912 - 3/1913 | 7 months | -3.72 in 11/1912 |
| 6/1913 - 9/1913 | 4 months | -3.75 in 8/1913 |
| 9/1914 - 1/1915 | 5 months | -4.40 in 11/1914 |
| 3/1915 - 6/1915 | 4 months | -4.69 in 6/1915 |
| 5/1918 - 8/1918 | 4 months | -3.49 in 8/1918 |
| 8/1923 - 9/1923 | 2 months | -3.70 in 9/1923 |
| 10/1924 - 6/1925 | 9 months | -4.08 in 2/1925 |
| 8/1925 - 9/1925 | 2 months | -3.33 in 8/1925 |
| 4/1927 - 6/1927 | 3 months | -3.27 in 4/1927 |
| 1/1930 - 2/1931 | 14 months | -4.33 in 9/1930 |
| 4/1941 - 6/1941 | 3 months | -3.23 in 6/1941 |
| 8/1941 - 2/1942 | 7 months | -4.46 in 11/1941 |
| 4/1942 - 5/1942 | 2 months | -3.10 in 5/1942 |
| 7/1949 - 1/1950 | 7 months | -4.02 in 12/1949 |
| 7/1957 - 11/1957 | 5 months | -4.55 in 10/1957 |
| 8/1964 - 10/1966 | 27 months | -4.96 in 12/1965 |
| 1/1967 - 2/1967 | 2 months | -3.32 in 2/1967 |
| Drought Periods | Duration | Lowest PDSI |
|---|---|---|
| 2/1901 - 3/1901 | 2 months | -3.45 in 2/1901 |
| 4/1905 - 5/1905 | 2 months | -3.49 in 5/1905 |
| 4/1910 - 5/1910 | 2 months | -3.42 in 5/1910 |
| 9/1910 - 7/1911 | 11 months | -3.74 in 6/1911 |
| 9/1912 - 9/1913 | 13 months | -4.11 in 8/1913 |
| 9/1914 - 12/1914 | 4 months | -3.95 in 11/1914 |
| 3/1915 - 7/1915 | 5 months | -4.02 in 4/1915 |
| 11/1918 - 1/1919 | 3 months | -3.16 in 12/1918 |
| 3/1919 - 4/1919 | 2 months | -3.36 in 4/1919 |
| 3/1921 - 4/1921 | 2 months | -3.36 in 3/1921 |
| 10/1924 - 11/1925 | 14 months | -5.13 in 2/1925 |
| 4/1927 - 5/1927 | 2 months | -3.40 in 5/1927 |
| 2/1930 - 2/1931 | 13 months | -4.72 in 9/1930 |
| 7/1944 - 10/1944 | 4 months | -3.98 in 8/1944 |
| 10/1949 - 12/1950 | 15 months | -4.05 in 12/1949 |
| 11/1952 - 12/1952 | 2 months | -3.10 in 12/1952 |
| 9/1957 - 11/1957 | 3 months | -3.82 in 10/1957 |
| 5/1965 - 10/1966 | 18 months | -5.16 in 12/1965 |
Based on the monthly Palmer Drought Severity Index as computed by the National Climatic Data Center.
Period of record: January 1895 through March 2006