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.

Year Percent
1910 6.00%
1911 22.60%
1912 11.50%
1913 4.70%
1914 13.50%
1915 18.40%
1916 15.30%
1917 12.90%
1918 6.30%
1919 6.40%
1920 8.50%
1921 10.90%
1922 16.30%
1923 29.10%
1924 7.90%
1925 9.50%
1926 5.90%
1927 15.70%
1928 10.10%
1929 7.80%
1930 8.20%
1931 7.40%
1932 5.80%
1933 7.70%
1934 5.50%
1935 2.00%
1936 0.00%
1937 15.30%
1938 9.60%
1939 7.90%
1940 1.90%
1941 14.30%
1942 12.20%
1943 1.90%
1944 18.90%
1945 2.10%
1946 17.40%
1947 6.20%
1948 10.00%
1949 4.00%
1950 4.10%
1951 5.80%
1952 9.70%
1953 19.00%
1954 11.50%
1955 11.60%
1956 6.00%
1957 11.60%
1958 2.10%
1959 1.80%
1960 7.90%
1961 11.90%
1962 4.20%
1963 3.80%
1964 21.60%
1965 0.00%
1966 1.90%
1967 7.70%
1968 21.90%
1969 8.10%
1970 9.20%
1971 15.70%
1972 6.00%
1973 13.60%
1974 4.00%
1975 6.30%
1976 7.60%
1977 13.90%
1978 7.70%
1979 2.20%
1980 9.40%
1981 9.60%
1982 12.10%
1983 4.10%
1984 8.50%
1985 4.30%
1986 4.20%
1987 21.30%
1988 12.30%
1989 6.10%
1990 7.40%
1991 14.00%
1992 6.10%
1993 28.90%
1994 5.90%
1995 16.90%
1996 2.10%
1997 11.80%
1998 23.90%
1999 13.60%
2000 10.40%
2001 24.20%
2002 3.80%
2003 2.10%
2004 9.70%
2005 35.40%
2006 6.00%
2007 41.20%
2008 25.10%
2009 4.40%
2010 22.80%
2011 17.00%
2012 0.00%

*As of September 2005, the fourth and fifth indicators are computed with data from one station per each grid box rather than multiple stations. This was done to eliminate many of the artificial extremes which resulted from a changing number of available stations over time. Therefore, the percentages in the step 4 and 5 graphs above will likely be significantly different from the percentages calculated prior to the changes implemented in September 2005.

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.