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 22.80%
1911 0.00%
1912 20.60%
1913 18.90%
1914 5.30%
1915 0.00%
1916 10.40%
1917 14.80%
1918 5.10%
1919 27.40%
1920 12.20%
1921 5.70%
1922 5.70%
1923 23.00%
1924 5.60%
1925 0.00%
1926 5.50%
1927 5.40%
1928 6.70%
1929 6.40%
1930 0.00%
1931 10.00%
1932 10.30%
1933 25.90%
1934 10.40%
1935 9.60%
1936 15.60%
1937 30.60%
1938 5.20%
1939 0.00%
1940 10.10%
1941 0.00%
1942 11.10%
1943 10.20%
1944 5.60%
1945 5.00%
1946 9.90%
1947 14.90%
1948 31.60%
1949 4.80%
1950 10.10%
1951 9.90%
1952 5.00%
1953 10.10%
1954 10.00%
1955 5.00%
1956 15.60%
1957 5.20%
1958 10.20%
1959 10.00%
1960 0.00%
1961 10.10%
1962 10.30%
1963 5.00%
1964 26.60%
1965 15.00%
1966 20.00%
1967 0.00%
1968 0.00%
1969 5.30%
1970 20.20%
1971 5.50%
1972 5.10%
1973 5.20%
1974 10.90%
1975 19.70%
1976 5.20%
1977 0.00%
1978 0.00%
1979 10.10%
1980 29.70%
1981 31.80%
1982 16.00%
1983 4.90%
1984 4.80%
1985 0.00%
1986 4.90%
1987 22.20%
1988 4.90%
1989 4.90%
1990 14.80%
1991 5.10%
1992 5.20%
1993 0.00%
1994 15.70%
1995 16.30%
1996 50.50%
1997 10.90%
1998 20.60%
1999 10.50%
2000 10.20%
2001 4.80%
2002 20.40%
2003 4.90%
2004 0.00%
2005 17.60%
2006 27.70%
2007 5.10%
2008 0.00%
2009 15.80%
2010 16.90%
2011 0.00%
2012 20.20%

*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.