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% 2.60%
1911 0.00% 21.10%
1912 30.90% 0.00%
1913 0.00% 0.00%
1914 0.00% 20.30%
1915 0.00% 6.90%
1916 0.00% 0.00%
1917 0.00% 6.70%
1918 0.00% 0.00%
1919 5.40% 0.00%
1920 15.80% 0.00%
1921 0.00% 14.30%
1922 0.00% 6.00%
1923 0.00% 0.00%
1924 2.60% 0.00%
1925 0.00% 53.00%
1926 10.40% 40.90%
1927 0.00% 60.20%
1928 33.00% 0.00%
1929 56.10% 0.00%
1930 10.40% 26.80%
1931 0.00% 45.20%
1932 4.50% 21.10%
1933 0.00% 3.90%
1934 0.00% 18.40%
1935 4.40% 5.40%
1936 10.00% 0.00%
1937 14.80% 0.00%
1938 2.60% 0.00%
1939 0.00% 0.90%
1940 0.00% 0.00%
1941 7.30% 30.00%
1942 1.00% 11.60%
1943 0.00% 6.50%
1944 0.00% 8.10%
1945 0.00% 2.90%
1946 16.40% 0.00%
1947 22.40% 0.00%
1948 38.30% 0.00%
1949 21.40% 0.00%
1950 1.80% 10.90%
1951 0.00% 10.50%
1952 0.00% 10.80%
1953 4.00% 0.00%
1954 4.00% 68.40%
1955 0.00% 51.60%
1956 0.00% 21.70%
1957 5.20% 0.00%
1958 19.40% 0.00%
1959 30.70% 0.00%
1960 15.90% 0.00%
1961 14.10% 0.00%
1962 11.60% 0.90%
1963 2.40% 5.30%
1964 48.50% 1.80%
1965 33.00% 6.20%
1966 15.30% 9.50%
1967 0.00% 4.70%
1968 2.10% 1.00%
1969 8.60% 2.60%
1970 4.50% 2.60%
1971 25.80% 0.90%
1972 24.10% 0.00%
1973 36.80% 0.00%
1974 17.00% 0.00%
1975 59.60% 4.90%
1976 29.40% 0.00%
1977 0.00% 0.00%
1978 14.60% 0.00%
1979 51.30% 0.00%
1980 0.00% 0.00%
1981 0.00% 39.30%
1982 4.80% 0.00%
1983 31.60% 0.00%
1984 3.90% 0.00%
1985 0.00% 10.40%
1986 0.00% 25.40%
1987 0.00% 0.00%
1988 0.00% 12.70%
1989 29.40% 4.60%
1990 9.80% 13.10%
1991 14.70% 4.40%
1992 4.80% 0.00%
1993 0.90% 0.00%
1994 19.70% 0.00%
1995 20.00% 0.00%
1996 44.10% 0.00%
1997 12.20% 0.00%
1998 1.00% 0.00%
1999 0.00% 24.30%
2000 2.40% 30.00%
2001 0.00% 18.00%
2002 0.00% 20.90%
2003 72.20% 0.00%
2004 13.90% 0.00%
2005 13.20% 0.00%
2006 0.00% 7.80%
2007 0.00% 62.00%
2008 0.00% 19.70%
2009 13.70% 0.00%
2010 2.10% 0.00%
2011 0.00% 48.80%
2012 0.00% 31.70%

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.