U.S. Climate Extremes Index (CEI)

Graph

Choose a period/season and an indicator from the options below and click "Plot" to create a time series graph. Note that the sixth indicator (Step 6) is not calculated for the spring (March-May), winter (December-February) and cold (October-March) seasons since most months during these periods are outside of the traditional hurricane season.



Move mouse towards an axis until highlighted. Left-click mouse to pan. Shift key + left-click to zoom.

Download: Wet Data | Dry Data
Year Wet Dry
1910 1.40% 16.50%
1911 1.60% 16.80%
1912 18.20% 0.00%
1913 10.40% 2.70%
1914 12.80% 13.20%
1915 28.50% 1.40%
1916 23.30% 0.00%
1917 13.50% 8.30%
1918 0.50% 19.80%
1919 16.10% 5.00%
1920 17.00% 0.40%
1921 4.30% 4.10%
1922 6.10% 3.30%
1923 5.10% 4.30%
1924 4.20% 12.80%
1925 0.00% 27.50%
1926 2.60% 12.70%
1927 17.90% 6.10%
1928 21.60% 2.70%
1929 10.60% 2.00%
1930 1.00% 15.60%
1931 5.00% 31.10%
1932 5.30% 6.60%
1933 1.30% 6.90%
1934 0.00% 57.00%
1935 5.00% 9.60%
1936 2.80% 35.30%
1937 6.20% 15.00%
1938 7.00% 2.10%
1939 0.70% 11.10%
1940 2.30% 11.50%
1941 25.80% 12.20%
1942 22.30% 3.30%
1943 7.40% 4.80%
1944 9.60% 5.40%
1945 16.10% 1.30%
1946 7.60% 2.40%
1947 10.10% 2.80%
1948 9.90% 4.50%
1949 6.40% 4.30%
1950 10.10% 4.30%
1951 13.70% 6.60%
1952 5.30% 6.10%
1953 7.80% 12.50%
1954 4.50% 34.70%
1955 0.00% 15.90%
1956 3.00% 32.90%
1957 12.00% 7.00%
1958 15.20% 3.20%
1959 1.70% 10.80%
1960 6.30% 6.70%
1961 7.40% 12.00%
1962 4.40% 1.90%
1963 0.50% 16.60%
1964 4.90% 16.30%
1965 12.60% 7.20%
1966 3.70% 10.50%
1967 3.50% 2.70%
1968 7.90% 0.60%
1969 4.70% 0.80%
1970 1.40% 1.20%
1971 5.50% 2.70%
1972 11.00% 3.90%
1973 30.50% 4.50%
1974 10.00% 0.90%
1975 22.20% 0.40%
1976 7.60% 6.10%
1977 0.00% 16.20%
1978 11.30% 2.70%
1979 24.90% 0.40%
1980 7.30% 8.80%
1981 5.20% 9.20%
1982 10.70% 0.30%
1983 36.40% 0.00%
1984 25.50% 1.20%
1985 11.50% 3.30%
1986 7.30% 7.70%
1987 12.80% 7.50%
1988 4.00% 29.40%
1989 13.40% 16.50%
1990 6.20% 11.40%
1991 8.30% 4.60%
1992 19.30% 8.60%
1993 32.10% 0.00%
1994 9.60% 3.10%
1995 25.60% 1.60%
1996 20.40% 6.80%
1997 19.50% 5.70%
1998 20.50% 3.30%
1999 14.30% 7.50%
2000 5.30% 20.80%
2001 3.50% 17.50%
2002 3.10% 33.00%
2003 15.40% 13.70%
2004 13.40% 7.80%
2005 24.80% 3.20%
2006 5.00% 17.70%
2007 13.00% 25.20%
2008 16.40% 6.40%
2009 17.50% 4.80%
2010 18.70% 1.80%
2011 30.20% 26.00%
2012 3.30% 35.80%

View CEI Data Files

Limitations: Statistics for the most recent period/season are computed from a fraction of the U.S. which has data available at that time. Extreme percentage values can and will likely change as final quality controlled data become available and fill in the data gaps.