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 0.00% 23.40%
1911 0.00% 0.00%
1912 28.20% 0.00%
1913 5.00% 0.00%
1914 26.90% 0.00%
1915 56.10% 0.00%
1916 48.10% 0.00%
1917 28.50% 0.00%
1918 0.00% 0.00%
1919 38.90% 0.00%
1920 41.30% 0.00%
1921 26.20% 0.00%
1922 5.10% 11.00%
1923 20.70% 0.00%
1924 2.00% 0.00%
1925 0.00% 0.00%
1926 0.00% 0.00%
1927 11.60% 0.00%
1928 13.70% 0.30%
1929 11.60% 0.00%
1930 0.00% 0.00%
1931 17.30% 2.70%
1932 31.60% 7.60%
1933 0.00% 9.40%
1934 0.00% 64.70%
1935 0.00% 31.60%
1936 0.00% 3.80%
1937 9.60% 8.80%
1938 6.50% 0.00%
1939 3.10% 0.00%
1940 3.10% 0.00%
1941 67.80% 0.00%
1942 41.00% 0.00%
1943 7.20% 7.80%
1944 5.20% 0.00%
1945 3.10% 0.00%
1946 0.00% 0.00%
1947 14.00% 15.60%
1948 0.00% 10.10%
1949 0.00% 0.00%
1950 0.00% 9.20%
1951 0.00% 19.90%
1952 2.70% 7.40%
1953 0.00% 9.00%
1954 0.00% 53.00%
1955 0.00% 30.10%
1956 0.00% 82.70%
1957 14.10% 5.20%
1958 4.60% 0.00%
1959 0.00% 30.80%
1960 3.50% 13.80%
1961 3.50% 3.40%
1962 0.00% 0.00%
1963 0.00% 34.90%
1964 0.00% 30.70%
1965 12.10% 5.20%
1966 1.30% 0.00%
1967 0.00% 0.00%
1968 3.40% 0.00%
1969 0.00% 0.00%
1970 0.00% 0.00%
1971 1.30% 13.80%
1972 0.00% 0.00%
1973 7.70% 0.00%
1974 0.00% 0.00%
1975 0.00% 2.40%
1976 0.00% 0.00%
1977 0.00% 25.80%
1978 12.70% 2.00%
1979 40.60% 0.00%
1980 9.50% 0.00%
1981 0.00% 10.20%
1982 4.00% 0.00%
1983 61.40% 0.00%
1984 40.30% 0.00%
1985 63.90% 0.00%
1986 38.00% 0.00%
1987 26.10% 0.00%
1988 10.10% 4.00%
1989 0.00% 32.50%
1990 0.00% 33.30%
1991 6.30% 3.10%
1992 44.20% 0.00%
1993 47.10% 0.00%
1994 0.00% 3.10%
1995 4.00% 0.00%
1996 0.00% 17.50%
1997 9.40% 7.70%
1998 15.80% 0.00%
1999 1.80% 0.00%
2000 0.00% 10.40%
2001 0.00% 11.70%
2002 0.00% 76.50%
2003 0.00% 60.70%
2004 0.00% 1.10%
2005 31.50% 0.00%
2006 0.00% 17.90%
2007 0.00% 25.50%
2008 0.00% 5.20%
2009 0.00% 0.00%
2010 0.00% 0.00%
2011 5.40% 35.30%
2012 0.00% 68.00%

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.