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 11.20%
1911 12.40%
1912 6.80%
1913 24.90%
1914 20.00%
1915 18.10%
1916 15.10%
1917 0.00%
1918 14.90%
1919 0.00%
1920 18.80%
1921 5.10%
1922 10.30%
1923 0.00%
1924 24.60%
1925 0.00%
1926 4.80%
1927 4.70%
1928 4.60%
1929 4.40%
1930 0.00%
1931 4.50%
1932 14.30%
1933 9.20%
1934 0.00%
1935 13.50%
1936 9.30%
1937 17.20%
1938 8.60%
1939 0.00%
1940 4.40%
1941 8.70%
1942 13.60%
1943 0.00%
1944 0.00%
1945 4.60%
1946 13.70%
1947 8.40%
1948 4.30%
1949 0.00%
1950 8.70%
1951 0.00%
1952 26.00%
1953 17.30%
1954 4.40%
1955 13.90%
1956 4.40%
1957 4.40%
1958 4.50%
1959 0.00%
1960 17.20%
1961 4.20%
1962 8.70%
1963 0.00%
1964 4.50%
1965 0.00%
1966 0.00%
1967 4.30%
1968 4.50%
1969 4.20%
1970 0.00%
1971 9.00%
1972 22.80%
1973 9.10%
1974 0.00%
1975 13.70%
1976 4.30%
1977 21.80%
1978 9.20%
1979 17.60%
1980 0.00%
1981 4.60%
1982 12.90%
1983 13.50%
1984 0.00%
1985 10.20%
1986 4.80%
1987 4.20%
1988 4.70%
1989 8.90%
1990 25.90%
1991 8.90%
1992 8.60%
1993 0.00%
1994 17.50%
1995 12.90%
1996 26.30%
1997 0.00%
1998 22.00%
1999 26.00%
2000 13.40%
2001 9.20%
2002 13.70%
2003 38.00%
2004 22.00%
2005 43.20%
2006 37.80%
2007 14.10%
2008 18.60%
2009 10.00%
2010 25.00%
2011 47.00%
2012 5.60%

*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.