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% 25.40%
1912 4.10% 1.60%
1913 20.30% 0.40%
1914 16.70% 4.60%
1915 11.10% 7.50%
1916 29.90% 0.20%
1917 21.80% 4.00%
1918 1.60% 15.60%
1919 1.90% 0.70%
1920 17.10% 1.80%
1921 12.80% 1.90%
1922 3.50% 5.40%
1923 0.00% 7.80%
1924 14.50% 7.20%
1925 1.00% 11.50%
1926 1.80% 12.90%
1927 9.00% 6.40%
1928 18.20% 4.50%
1929 17.00% 5.30%
1930 5.60% 7.40%
1931 0.70% 24.60%
1932 8.20% 17.20%
1933 8.00% 5.40%
1934 0.80% 27.70%
1935 0.60% 40.80%
1936 3.20% 10.20%
1937 4.30% 24.20%
1938 2.90% 10.40%
1939 4.60% 7.60%
1940 0.90% 26.30%
1941 8.30% 12.90%
1942 33.50% 9.80%
1943 15.80% 2.80%
1944 1.70% 5.00%
1945 7.90% 6.10%
1946 13.90% 0.50%
1947 7.80% 2.80%
1948 12.50% 7.60%
1949 8.40% 5.00%
1950 5.50% 4.40%
1951 15.20% 9.60%
1952 16.70% 11.20%
1953 0.40% 17.50%
1954 2.90% 29.40%
1955 2.80% 42.00%
1956 5.40% 29.30%
1957 1.70% 34.00%
1958 18.80% 0.20%
1959 3.20% 2.30%
1960 11.40% 5.00%
1961 4.20% 13.30%
1962 6.30% 6.60%
1963 0.50% 4.20%
1964 0.70% 33.10%
1965 7.80% 11.30%
1966 9.80% 6.20%
1967 0.00% 8.70%
1968 2.80% 1.70%
1969 6.90% 1.90%
1970 3.20% 0.30%
1971 4.70% 1.40%
1972 9.20% 0.40%
1973 26.00% 0.00%
1974 24.00% 0.00%
1975 19.40% 0.80%
1976 15.80% 0.30%
1977 4.90% 22.20%
1978 6.60% 3.70%
1979 17.70% 0.10%
1980 14.90% 1.40%
1981 3.10% 14.50%
1982 7.50% 3.30%
1983 29.80% 0.10%
1984 29.20% 0.00%
1985 16.00% 2.20%
1986 15.20% 0.30%
1987 19.50% 1.00%
1988 6.50% 13.10%
1989 0.80% 20.10%
1990 12.30% 18.80%
1991 7.70% 15.30%
1992 12.80% 6.10%
1993 30.60% 3.30%
1994 21.60% 0.40%
1995 7.80% 0.90%
1996 26.90% 1.30%
1997 30.40% 3.50%
1998 21.70% 0.70%
1999 11.50% 4.10%
2000 4.70% 18.20%
2001 4.20% 14.00%
2002 6.00% 24.80%
2003 5.90% 23.10%
2004 12.20% 17.80%
2005 28.50% 3.70%
2006 13.80% 6.10%
2007 9.50% 9.20%
2008 7.20% 18.20%
2009 19.10% 10.70%
2010 27.70% 1.00%
2011 20.90% 6.40%
2012 6.20% 22.00%
2013 2.50% 35.10%

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.