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% 25.70%
1911 0.00% 20.10%
1912 0.00% 3.90%
1913 0.00% 6.20%
1914 0.00% 11.10%
1915 0.00% 1.70%
1916 1.90% 0.00%
1917 14.90% 3.50%
1918 9.40% 6.20%
1919 0.00% 0.00%
1920 28.00% 0.00%
1921 0.00% 9.30%
1922 1.50% 10.60%
1923 0.00% 15.00%
1924 0.00% 1.30%
1925 0.00% 27.10%
1926 18.00% 0.00%
1927 20.20% 0.00%
1928 46.30% 0.00%
1929 8.40% 0.00%
1930 0.00% 32.00%
1931 0.00% 27.60%
1932 0.00% 3.10%
1933 2.50% 7.70%
1934 1.50% 25.20%
1935 3.00% 6.40%
1936 1.50% 15.30%
1937 5.30% 0.00%
1938 2.40% 0.00%
1939 0.00% 0.00%
1940 0.00% 6.80%
1941 0.00% 45.90%
1942 0.00% 19.10%
1943 0.00% 16.30%
1944 0.00% 6.60%
1945 31.00% 0.00%
1946 0.00% 0.00%
1947 0.00% 2.80%
1948 4.00% 25.30%
1949 4.10% 34.40%
1950 19.70% 13.20%
1951 20.30% 0.00%
1952 11.10% 0.00%
1953 0.00% 9.30%
1954 24.90% 36.10%
1955 0.00% 25.30%
1956 0.40% 32.10%
1957 21.80% 42.60%
1958 27.50% 0.00%
1959 0.00% 0.00%
1960 0.70% 0.00%
1961 0.70% 3.70%
1962 0.00% 8.10%
1963 0.00% 34.10%
1964 0.00% 53.70%
1965 0.00% 65.10%
1966 0.00% 50.30%
1967 0.00% 1.30%
1968 9.20% 0.00%
1969 0.00% 0.90%
1970 0.00% 0.00%
1971 0.50% 0.80%
1972 25.20% 0.00%
1973 56.70% 0.00%
1974 27.40% 0.60%
1975 22.40% 0.00%
1976 26.10% 3.50%
1977 17.20% 0.00%
1978 13.80% 0.00%
1979 24.60% 1.50%
1980 0.00% 20.40%
1981 3.80% 7.00%
1982 0.00% 0.00%
1983 9.20% 0.00%
1984 3.60% 0.00%
1985 5.40% 17.10%
1986 3.80% 11.80%
1987 0.00% 11.30%
1988 0.00% 14.80%
1989 18.30% 0.00%
1990 26.30% 0.00%
1991 12.50% 3.80%
1992 2.70% 2.00%
1993 10.40% 0.00%
1994 6.00% 0.00%
1995 0.00% 0.40%
1996 43.10% 0.00%
1997 22.10% 0.00%
1998 4.20% 0.00%
1999 0.00% 6.30%
2000 0.60% 10.70%
2001 3.50% 22.70%
2002 3.50% 26.70%
2003 17.00% 3.50%
2004 24.90% 0.00%
2005 29.50% 0.00%
2006 53.70% 12.70%
2007 42.80% 0.60%
2008 64.50% 0.40%
2009 63.30% 0.00%
2010 18.00% 0.00%
2011 53.20% 9.60%
2012 0.00% 19.60%

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.