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
1911 0.70% 23.60%
1912 4.80% 1.30%
1913 15.40% 0.60%
1914 18.70% 5.30%
1915 11.20% 5.10%
1916 32.10% 0.00%
1917 20.50% 4.30%
1918 1.70% 16.50%
1919 1.10% 0.70%
1920 16.40% 3.00%
1921 13.20% 1.70%
1922 3.40% 5.50%
1923 0.50% 7.90%
1924 15.40% 8.30%
1925 1.00% 8.80%
1926 1.60% 11.40%
1927 7.80% 6.40%
1928 16.80% 4.50%
1929 14.90% 5.90%
1930 5.90% 6.90%
1931 0.70% 27.60%
1932 10.40% 15.30%
1933 7.90% 5.90%
1934 1.00% 28.00%
1935 1.10% 40.60%
1936 2.40% 10.50%
1937 4.10% 23.30%
1938 2.00% 11.80%
1939 4.50% 6.70%
1940 0.40% 30.70%
1941 7.20% 11.20%
1942 28.20% 9.80%
1943 13.60% 2.80%
1944 0.20% 6.10%
1945 6.00% 6.80%
1946 14.70% 0.00%
1947 8.20% 2.60%
1948 9.30% 8.80%
1949 10.50% 2.60%
1950 6.20% 4.90%
1951 11.50% 11.90%
1952 17.10% 11.60%
1953 0.50% 13.70%
1954 1.90% 30.40%
1955 2.30% 40.50%
1956 10.40% 30.70%
1957 1.10% 34.60%
1958 16.50% 0.10%
1959 2.60% 2.30%
1960 10.10% 5.40%
1961 4.40% 13.70%
1962 10.70% 5.60%
1963 0.50% 4.70%
1964 0.30% 30.50%
1965 10.60% 10.50%
1966 12.50% 6.20%
1967 1.10% 6.70%
1968 2.30% 1.70%
1969 11.80% 1.10%
1970 3.60% 0.30%
1971 5.40% 2.60%
1972 9.30% 0.40%
1973 26.30% 0.00%
1974 26.60% 0.00%
1975 17.80% 0.40%
1976 13.20% 1.40%
1977 4.50% 25.20%
1978 8.00% 3.40%
1979 21.80% 0.30%
1980 9.90% 2.10%
1981 1.00% 17.20%
1982 7.70% 3.70%
1983 30.60% 0.10%
1984 27.50% 0.00%
1985 19.90% 2.20%
1986 15.20% 0.30%
1987 17.90% 0.60%
1988 6.50% 10.50%
1989 0.80% 18.70%
1990 10.60% 22.40%
1991 7.20% 18.30%
1992 14.70% 6.30%
1993 33.10% 3.00%
1994 23.50% 0.70%
1995 10.40% 1.50%
1996 24.60% 2.90%
1997 32.40% 2.00%
1998 23.00% 0.70%
1999 12.10% 3.60%
2000 3.00% 22.30%
2001 5.50% 13.30%
2002 5.60% 23.20%
2003 6.10% 25.30%
2004 12.00% 13.80%
2005 28.60% 4.70%
2006 12.40% 9.90%
2007 9.70% 8.10%
2008 7.30% 15.10%
2009 19.30% 11.50%
2010 28.30% 1.00%
2011 20.00% 7.40%
2012 5.00% 17.60%
2013 2.60% 31.90%

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.