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 27.00% 0.00%
1911 18.90% 9.20%
1912 44.20% 0.00%
1913 37.40% 7.50%
1914 15.20% 3.50%
1915 25.10% 0.00%
1916 65.30% 0.00%
1917 42.20% 0.00%
1918 3.20% 0.00%
1919 0.00% 0.00%
1920 7.60% 0.00%
1921 0.00% 0.00%
1922 0.00% 0.00%
1923 11.80% 0.00%
1924 18.10% 0.00%
1925 2.40% 6.40%
1926 2.40% 11.50%
1927 39.10% 0.00%
1928 30.60% 0.00%
1929 8.20% 5.20%
1930 0.00% 0.00%
1931 0.00% 30.50%
1932 0.00% 6.20%
1933 0.00% 5.70%
1934 0.00% 76.70%
1935 0.00% 55.70%
1936 0.00% 70.00%
1937 0.00% 64.80%
1938 0.00% 22.10%
1939 0.00% 28.40%
1940 0.00% 35.30%
1941 0.00% 6.80%
1942 11.70% 0.00%
1943 13.70% 0.00%
1944 11.70% 5.20%
1945 13.70% 5.20%
1946 7.70% 0.00%
1947 6.80% 0.00%
1948 9.50% 0.00%
1949 0.00% 5.70%
1950 5.90% 0.00%
1951 17.20% 0.00%
1952 2.70% 1.90%
1953 4.70% 4.80%
1954 4.70% 21.50%
1955 0.00% 19.60%
1956 0.00% 22.40%
1957 0.00% 0.00%
1958 0.00% 8.30%
1959 6.60% 4.60%
1960 1.40% 18.50%
1961 0.00% 32.40%
1962 0.00% 5.70%
1963 0.00% 5.70%
1964 0.00% 5.60%
1965 10.90% 0.00%
1966 3.10% 8.50%
1967 0.00% 0.00%
1968 0.00% 0.00%
1969 3.00% 0.00%
1970 3.00% 0.00%
1971 2.30% 0.00%
1972 12.00% 0.00%
1973 8.40% 0.00%
1974 0.00% 1.60%
1975 22.80% 1.60%
1976 7.10% 9.90%
1977 0.00% 8.50%
1978 24.50% 1.90%
1979 0.00% 0.00%
1980 0.00% 15.40%
1981 5.20% 15.50%
1982 6.90% 0.00%
1983 44.90% 0.00%
1984 22.10% 4.70%
1985 1.60% 0.00%
1986 13.20% 0.00%
1987 1.40% 0.00%
1988 0.00% 54.30%
1989 0.00% 37.90%
1990 0.00% 32.00%
1991 0.00% 8.10%
1992 0.00% 6.00%
1993 19.80% 0.00%
1994 32.00% 0.00%
1995 49.00% 0.00%
1996 30.00% 0.00%
1997 28.50% 0.00%
1998 15.90% 0.00%
1999 25.30% 0.00%
2000 12.90% 19.70%
2001 1.20% 38.30%
2002 0.00% 33.40%
2003 0.00% 15.50%
2004 0.00% 14.90%
2005 2.70% 4.70%
2006 0.00% 9.00%
2007 5.90% 14.60%
2008 9.60% 4.30%
2009 39.80% 0.00%
2010 48.90% 0.00%
2011 64.00% 0.00%
2012 4.70% 27.40%

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.