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 13.10%
1911 3.70%
1912 5.90%
1913 4.00%
1914 1.90%
1915 4.30%
1916 5.90%
1917 0.00%
1918 12.90%
1919 13.60%
1920 5.70%
1921 5.50%
1922 12.70%
1923 7.30%
1924 1.80%
1925 3.80%
1926 5.60%
1927 12.70%
1928 9.40%
1929 11.00%
1930 2.00%
1931 9.00%
1932 5.60%
1933 12.70%
1934 10.80%
1935 1.80%
1936 12.80%
1937 18.60%
1938 8.90%
1939 10.50%
1940 7.10%
1941 5.30%
1942 5.40%
1943 1.70%
1944 9.00%
1945 7.50%
1946 3.80%
1947 3.60%
1948 5.40%
1949 7.20%
1950 26.60%
1951 1.80%
1952 5.40%
1953 1.80%
1954 10.60%
1955 9.10%
1956 0.00%
1957 11.10%
1958 16.70%
1959 5.30%
1960 5.40%
1961 10.60%
1962 5.60%
1963 3.70%
1964 9.10%
1965 7.50%
1966 12.70%
1967 0.00%
1968 7.50%
1969 12.80%
1970 10.80%
1971 7.20%
1972 1.80%
1973 13.30%
1974 3.80%
1975 5.60%
1976 16.50%
1977 10.90%
1978 5.70%
1979 9.20%
1980 5.50%
1981 14.00%
1982 16.80%
1983 20.20%
1984 5.60%
1985 13.30%
1986 15.40%
1987 5.30%
1988 11.30%
1989 9.10%
1990 38.00%
1991 7.20%
1992 3.80%
1993 14.80%
1994 13.70%
1995 9.60%
1996 33.20%
1997 1.90%
1998 27.10%
1999 10.80%
2000 22.10%
2001 11.30%
2002 21.20%
2003 18.50%
2004 23.30%
2005 11.70%
2006 14.90%
2007 21.80%
2008 34.90%
2009 20.40%
2010 27.90%
2011 23.40%
2012 14.30%

*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.