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 7.30% 11.10%
1911 3.10% 25.00%
1912 12.90% 1.20%
1913 12.10% 1.10%
1914 19.40% 7.90%
1915 17.90% 6.60%
1916 30.60% 2.30%
1917 19.60% 7.30%
1918 0.50% 18.80%
1919 3.90% 0.00%
1920 20.30% 1.00%
1921 5.30% 2.90%
1922 2.50% 2.20%
1923 0.50% 5.20%
1924 10.00% 8.60%
1925 0.00% 19.30%
1926 3.40% 13.70%
1927 13.10% 6.80%
1928 8.90% 1.10%
1929 17.40% 4.30%
1930 1.70% 6.60%
1931 5.10% 30.50%
1932 5.10% 10.50%
1933 4.30% 2.80%
1934 0.20% 42.80%
1935 0.80% 28.00%
1936 2.10% 9.80%
1937 2.70% 18.70%
1938 5.50% 6.20%
1939 1.60% 9.70%
1940 0.90% 19.10%
1941 21.40% 18.00%
1942 25.30% 7.70%
1943 11.30% 2.90%
1944 5.10% 4.00%
1945 11.30% 3.10%
1946 7.40% 0.90%
1947 5.50% 5.40%
1948 9.40% 4.10%
1949 4.90% 4.00%
1950 11.00% 4.30%
1951 10.00% 11.50%
1952 12.90% 5.20%
1953 2.70% 10.90%
1954 2.30% 29.60%
1955 1.10% 32.50%
1956 5.40% 32.30%
1957 1.90% 10.70%
1958 20.10% 2.80%
1959 3.40% 8.00%
1960 8.90% 4.10%
1961 6.00% 11.90%
1962 1.20% 2.70%
1963 0.20% 15.20%
1964 3.50% 16.10%
1965 6.80% 8.20%
1966 5.80% 7.80%
1967 0.30% 8.80%
1968 3.80% 2.50%
1969 7.60% 2.20%
1970 0.70% 0.80%
1971 5.70% 7.30%
1972 5.20% 4.10%
1973 43.10% 1.50%
1974 17.80% 1.00%
1975 21.60% 0.70%
1976 10.10% 3.90%
1977 1.80% 28.50%
1978 10.80% 1.70%
1979 27.50% 0.00%
1980 15.00% 4.10%
1981 1.50% 18.70%
1982 11.90% 0.90%
1983 45.60% 0.00%
1984 32.10% 0.70%
1985 15.30% 8.10%
1986 8.60% 6.40%
1987 15.30% 5.40%
1988 2.90% 20.20%
1989 3.00% 14.60%
1990 10.20% 17.40%
1991 8.40% 6.10%
1992 15.60% 13.00%
1993 33.90% 0.50%
1994 16.30% 1.80%
1995 16.00% 1.10%
1996 26.20% 10.40%
1997 26.60% 3.40%
1998 21.20% 0.20%
1999 12.20% 5.50%
2000 2.70% 19.70%
2001 7.50% 17.50%
2002 6.60% 27.40%
2003 7.30% 12.20%
2004 8.30% 12.70%
2005 23.60% 3.30%
2006 10.40% 15.80%
2007 10.00% 18.90%
2008 15.00% 11.20%
2009 17.40% 5.20%
2010 16.90% 1.30%
2011 30.00% 13.60%
2012 2.80% 21.30%
2013 6.30% 24.70%

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.