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 8.70% 8.30%
1911 3.10% 27.50%
1912 10.80% 2.00%
1913 14.70% 1.10%
1914 19.70% 9.30%
1915 18.40% 5.10%
1916 33.20% 1.30%
1917 20.50% 7.60%
1918 0.50% 18.20%
1919 2.40% 0.10%
1920 18.40% 1.50%
1921 7.90% 3.30%
1922 2.20% 2.60%
1923 0.30% 5.30%
1924 8.70% 9.70%
1925 0.20% 16.00%
1926 2.40% 11.80%
1927 12.10% 7.40%
1928 13.30% 1.10%
1929 16.10% 4.40%
1930 1.70% 6.00%
1931 3.10% 32.30%
1932 6.60% 12.50%
1933 2.80% 3.10%
1934 0.10% 42.90%
1935 1.00% 29.10%
1936 3.50% 12.10%
1937 3.70% 19.10%
1938 4.80% 6.60%
1939 1.60% 9.20%
1940 0.80% 20.40%
1941 19.90% 15.60%
1942 22.80% 7.30%
1943 12.20% 4.20%
1944 3.10% 5.00%
1945 8.00% 2.10%
1946 8.40% 0.50%
1947 6.60% 3.40%
1948 10.10% 5.20%
1949 7.90% 4.20%
1950 11.30% 4.30%
1951 12.10% 10.40%
1952 8.90% 6.80%
1953 1.60% 12.50%
1954 2.20% 29.30%
1955 0.70% 35.50%
1956 4.80% 33.70%
1957 1.20% 12.00%
1958 19.20% 1.70%
1959 2.80% 4.90%
1960 9.00% 5.10%
1961 4.40% 15.10%
1962 1.90% 2.60%
1963 0.50% 13.70%
1964 3.30% 23.10%
1965 8.60% 8.70%
1966 5.20% 8.40%
1967 0.30% 5.40%
1968 4.00% 2.10%
1969 9.30% 1.70%
1970 1.10% 1.00%
1971 6.40% 4.50%
1972 8.40% 0.80%
1973 39.10% 0.40%
1974 20.30% 0.70%
1975 21.90% 0.70%
1976 12.70% 3.70%
1977 2.30% 27.40%
1978 11.00% 2.00%
1979 27.40% 0.30%
1980 11.70% 4.10%
1981 2.10% 18.00%
1982 12.10% 1.30%
1983 40.00% 0.00%
1984 29.80% 0.70%
1985 14.60% 6.20%
1986 9.10% 5.50%
1987 15.50% 4.10%
1988 3.60% 20.80%
1989 3.40% 18.60%
1990 9.10% 18.40%
1991 6.80% 8.90%
1992 17.00% 9.80%
1993 32.70% 0.50%
1994 17.90% 1.60%
1995 16.50% 0.50%
1996 27.60% 6.90%
1997 28.00% 3.40%
1998 19.80% 0.20%
1999 13.00% 4.80%
2000 2.60% 18.20%
2001 7.60% 16.20%
2002 3.80% 26.80%
2003 10.50% 21.10%
2004 11.60% 11.20%
2005 24.60% 2.50%
2006 10.80% 16.70%
2007 8.80% 16.60%
2008 13.40% 11.50%
2009 18.60% 5.10%
2010 18.70% 0.00%
2011 27.10% 14.80%
2012 2.50% 18.10%
2013 5.80% 24.60%

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.