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 4.20% 16.90%
1911 2.90% 13.90%
1912 19.90% 0.50%
1913 11.50% 2.30%
1914 17.20% 10.60%
1915 24.20% 0.90%
1916 26.50% 0.40%
1917 11.50% 10.40%
1918 1.10% 9.10%
1919 16.20% 0.20%
1920 17.90% 0.70%
1921 6.70% 4.10%
1922 0.80% 6.30%
1923 6.20% 5.20%
1924 3.40% 8.80%
1925 0.40% 18.50%
1926 2.70% 9.80%
1927 19.20% 7.40%
1928 16.90% 2.70%
1929 12.50% 7.20%
1930 1.00% 15.70%
1931 5.50% 30.20%
1932 10.80% 7.60%
1933 0.80% 7.40%
1934 0.10% 52.30%
1935 1.90% 25.70%
1936 2.90% 22.80%
1937 5.30% 18.50%
1938 4.70% 6.10%
1939 0.40% 14.00%
1940 1.10% 15.40%
1941 28.60% 12.60%
1942 21.90% 3.60%
1943 5.00% 4.90%
1944 5.70% 7.30%
1945 15.10% 1.20%
1946 8.10% 1.30%
1947 6.60% 2.90%
1948 11.90% 5.60%
1949 5.70% 4.60%
1950 12.60% 6.80%
1951 17.20% 9.10%
1952 3.30% 9.40%
1953 2.60% 19.30%
1954 3.20% 44.50%
1955 0.80% 29.40%
1956 4.00% 40.40%
1957 6.10% 5.90%
1958 11.80% 2.60%
1959 6.10% 8.10%
1960 6.20% 9.60%
1961 8.80% 8.50%
1962 1.80% 2.30%
1963 0.50% 23.30%
1964 4.80% 23.10%
1965 11.70% 7.80%
1966 3.30% 8.90%
1967 2.40% 2.00%
1968 5.80% 0.40%
1969 5.50% 0.90%
1970 1.90% 0.30%
1971 9.20% 2.70%
1972 11.10% 0.00%
1973 28.20% 0.00%
1974 16.90% 0.30%
1975 21.30% 1.10%
1976 6.10% 6.90%
1977 1.20% 12.90%
1978 13.70% 2.00%
1979 24.70% 0.40%
1980 4.80% 5.00%
1981 3.10% 12.20%
1982 17.70% 0.00%
1983 42.70% 0.00%
1984 23.10% 1.20%
1985 20.40% 2.80%
1986 13.40% 3.80%
1987 12.60% 9.90%
1988 1.40% 23.30%
1989 9.10% 18.90%
1990 8.50% 17.10%
1991 9.20% 5.70%
1992 20.30% 7.30%
1993 28.30% 0.20%
1994 16.80% 1.70%
1995 18.10% 0.00%
1996 27.60% 4.30%
1997 26.40% 1.10%
1998 17.40% 0.70%
1999 8.50% 6.10%
2000 3.40% 16.40%
2001 3.60% 19.40%
2002 2.90% 30.00%
2003 14.50% 16.80%
2004 12.30% 3.00%
2005 19.00% 2.10%
2006 5.80% 13.20%
2007 9.00% 23.00%
2008 16.70% 9.40%
2009 23.00% 4.30%
2010 17.80% 0.40%
2011 21.60% 21.70%
2012 3.50% 34.70%

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.