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% 65.40%
1911 0.00% 42.50%
1912 10.70% 0.00%
1913 8.80% 5.00%
1914 0.00% 16.20%
1915 12.60% 0.00%
1916 9.80% 0.00%
1917 0.00% 0.00%
1918 0.00% 0.00%
1919 0.00% 0.00%
1920 0.00% 8.00%
1921 0.00% 12.50%
1922 0.00% 16.80%
1923 0.00% 19.30%
1924 0.00% 7.80%
1925 0.00% 14.50%
1926 0.00% 0.00%
1927 6.90% 0.00%
1928 0.00% 0.00%
1929 2.10% 0.00%
1930 0.00% 29.60%
1931 0.00% 52.80%
1932 4.70% 11.80%
1933 0.00% 30.30%
1934 0.00% 76.50%
1935 10.50% 17.70%
1936 0.00% 31.00%
1937 0.00% 33.10%
1938 8.50% 4.10%
1939 0.00% 12.30%
1940 0.00% 19.70%
1941 0.00% 0.00%
1942 11.00% 0.00%
1943 3.80% 0.00%
1944 2.40% 0.00%
1945 10.60% 0.00%
1946 0.00% 1.80%
1947 0.00% 0.00%
1948 0.00% 24.10%
1949 0.00% 14.70%
1950 25.30% 10.10%
1951 52.90% 0.00%
1952 11.80% 0.00%
1953 0.00% 7.00%
1954 0.00% 6.30%
1955 0.00% 17.20%
1956 0.00% 38.90%
1957 0.00% 23.50%
1958 0.00% 14.50%
1959 0.00% 0.00%
1960 27.10% 0.00%
1961 6.40% 3.50%
1962 2.60% 2.60%
1963 0.00% 23.90%
1964 0.00% 37.00%
1965 16.80% 2.60%
1966 10.40% 0.00%
1967 7.50% 5.60%
1968 5.40% 0.00%
1969 16.20% 0.00%
1970 0.00% 0.00%
1971 14.50% 2.60%
1972 25.50% 0.00%
1973 39.40% 0.00%
1974 11.80% 0.00%
1975 12.00% 0.00%
1976 0.00% 24.20%
1977 0.00% 39.90%
1978 17.30% 0.00%
1979 23.50% 0.00%
1980 2.80% 0.00%
1981 8.90% 2.90%
1982 18.20% 0.00%
1983 54.50% 0.00%
1984 34.40% 0.00%
1985 48.80% 0.00%
1986 44.00% 0.00%
1987 2.00% 7.70%
1988 0.00% 47.50%
1989 0.00% 47.60%
1990 0.00% 5.20%
1991 21.20% 0.00%
1992 19.50% 0.00%
1993 68.60% 0.00%
1994 34.90% 0.00%
1995 14.90% 0.00%
1996 40.90% 0.00%
1997 6.80% 0.00%
1998 9.60% 6.60%
1999 14.40% 1.80%
2000 10.40% 2.70%
2001 23.30% 0.00%
2002 10.50% 0.00%
2003 0.00% 1.20%
2004 11.70% 0.00%
2005 17.80% 0.00%
2006 3.00% 8.70%
2007 11.80% 3.90%
2008 39.40% 0.00%
2009 42.10% 0.00%
2010 41.10% 0.00%
2011 15.60% 0.00%
2012 0.00% 37.30%

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.