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% 1.00%
1911 0.00% 0.00%
1912 10.20% 0.00%
1913 1.10% 0.00%
1914 0.00% 53.00%
1915 0.00% 0.00%
1916 17.60% 0.00%
1917 0.00% 7.00%
1918 0.00% 0.00%
1919 0.00% 0.00%
1920 2.70% 0.00%
1921 0.00% 0.00%
1922 0.00% 0.00%
1923 6.20% 2.90%
1924 0.00% 0.00%
1925 0.00% 10.10%
1926 0.00% 0.00%
1927 62.20% 0.00%
1928 29.70% 0.00%
1929 31.10% 0.00%
1930 0.00% 41.70%
1931 0.00% 72.60%
1932 0.00% 6.10%
1933 0.00% 1.20%
1934 0.00% 53.40%
1935 3.60% 15.40%
1936 0.00% 21.10%
1937 6.20% 0.00%
1938 1.30% 4.70%
1939 0.00% 5.60%
1940 0.00% 57.50%
1941 0.00% 50.90%
1942 4.40% 7.80%
1943 1.20% 7.80%
1944 0.00% 26.70%
1945 18.60% 0.00%
1946 1.70% 2.40%
1947 0.00% 5.60%
1948 1.30% 0.00%
1949 13.70% 0.00%
1950 59.60% 0.00%
1951 36.10% 0.00%
1952 0.00% 0.00%
1953 0.00% 71.40%
1954 0.00% 77.00%
1955 0.00% 33.40%
1956 2.40% 31.90%
1957 1.30% 4.70%
1958 11.30% 0.00%
1959 5.30% 2.30%
1960 0.00% 5.70%
1961 0.00% 1.60%
1962 0.00% 1.60%
1963 0.00% 36.60%
1964 0.00% 60.00%
1965 0.00% 10.40%
1966 0.00% 6.90%
1967 0.00% 1.10%
1968 0.00% 3.40%
1969 0.00% 3.20%
1970 1.80% 0.90%
1971 0.00% 0.00%
1972 6.50% 0.00%
1973 59.10% 0.00%
1974 51.10% 0.00%
1975 40.60% 0.00%
1976 0.00% 0.00%
1977 0.00% 0.00%
1978 1.00% 0.00%
1979 44.50% 0.00%
1980 8.60% 10.60%
1981 3.40% 0.00%
1982 22.10% 0.00%
1983 8.10% 0.00%
1984 0.00% 0.00%
1985 24.60% 0.00%
1986 5.10% 5.80%
1987 0.00% 18.20%
1988 0.00% 28.40%
1989 38.60% 3.80%
1990 46.90% 0.00%
1991 0.00% 4.70%
1992 0.00% 0.00%
1993 44.90% 0.00%
1994 41.20% 0.00%
1995 0.00% 0.00%
1996 23.50% 0.00%
1997 37.90% 0.00%
1998 6.00% 0.00%
1999 0.00% 24.80%
2000 0.00% 21.70%
2001 0.00% 0.00%
2002 8.60% 0.00%
2003 32.20% 4.70%
2004 49.40% 0.00%
2005 6.20% 4.50%
2006 7.00% 11.10%
2007 10.30% 14.70%
2008 43.80% 5.80%
2009 44.20% 0.00%
2010 25.60% 0.00%
2011 26.20% 0.00%
2012 2.30% 34.60%

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.