Periods of 2 or More Months of Severe or Extreme Drought
| Drought Periods | Duration | Lowest PDSI |
|---|---|---|
| 7/1923 - 9/1923 | 3 months | -3.48 in 8/1923 |
| 1/1931 - 2/1931 | 2 months | -3.11 in 1/1931 |
| 11/1931 - 2/1932 | 4 months | -3.68 in 12/1931 |
| 7/1932 - 9/1932 | 3 months | -3.81 in 9/1932 |
| 12/1939 - 1/1940 | 2 months | -3.24 in 1/1940 |
| 11/1949 - 1/1950 | 3 months | -3.72 in 12/1949 |
| 7/1963 - 8/1963 | 2 months | -3.44 in 8/1963 |
| 8/1964 - 8/1966 | 25 months | -5.25 in 8/1966 |
| 7/1999 - 8/1999 | 2 months | -3.86 in 7/1999 |
| 12/2001 - 5/2002 | 6 months | -4.42 in 2/2002 |
| Drought Periods | Duration | Lowest PDSI |
|---|---|---|
| 12/1949 - 1/1950 | 2 months | -3.38 in 1/1950 |
| 7/1957 - 11/1957 | 5 months | -4.14 in 10/1957 |
| 5/1965 - 8/1966 | 16 months | -5.63 in 12/1965 |
| 3/1985 - 6/1985 | 4 months | -3.90 in 4/1985 |
| 11/1998 - 12/1998 | 2 months | -3.93 in 12/1998 |
| 12/2001 - 5/2002 | 6 months | -5.00 in 2/2002 |
| 7/2002 - 9/2002 | 3 months | -3.32 in 8/2002 |
| Drought Periods | Duration | Lowest PDSI |
|---|---|---|
| 1/1931 - 2/1931 | 2 months | -3.41 in 2/1931 |
| 11/1931 - 2/1932 | 4 months | -4.00 in 12/1931 |
| 12/1949 - 6/1950 | 7 months | -4.15 in 1/1950 |
| 8/1957 - 10/1957 | 3 months | -3.20 in 10/1957 |
| 11/1964 - 12/1964 | 2 months | -3.13 in 11/1964 |
| 10/1965 - 4/1966 | 7 months | -4.86 in 12/1965 |
| 7/1966 - 8/1966 | 2 months | -3.73 in 8/1966 |
| 3/1985 - 5/1985 | 3 months | -3.78 in 4/1985 |
| 5/1986 - 7/1986 | 3 months | -3.79 in 6/1986 |
| 11/1998 - 12/1998 | 2 months | -3.86 in 12/1998 |
| 6/1999 - 8/1999 | 3 months | -3.74 in 7/1999 |
| 11/2001 - 9/2002 | 11 months | -6.53 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