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 0.00%
1911 33.90%
1912 0.00%
1913 0.00%
1914 20.40%
1915 14.10%
1916 0.00%
1917 0.00%
1918 0.00%
1919 14.50%
1920 0.00%
1921 0.00%
1922 11.30%
1923 0.00%
1924 21.40%
1925 0.00%
1926 45.00%
1927 9.40%
1928 0.00%
1929 0.00%
1930 0.00%
1931 0.00%
1932 0.00%
1933 11.70%
1934 0.00%
1935 0.00%
1936 20.40%
1937 9.90%
1938 20.00%
1939 0.00%
1940 19.60%
1941 9.90%
1942 0.00%
1943 9.90%
1944 0.00%
1945 0.00%
1946 10.30%
1947 0.00%
1948 0.00%
1949 0.00%
1950 30.00%
1951 19.70%
1952 10.10%
1953 9.90%
1954 29.60%
1955 30.00%
1956 11.00%
1957 0.00%
1958 0.00%
1959 40.30%
1960 0.00%
1961 0.00%
1962 50.00%
1963 0.00%
1964 0.00%
1965 9.90%
1966 29.80%
1967 0.00%
1968 0.00%
1969 30.00%
1970 19.40%
1971 0.00%
1972 0.00%
1973 11.30%
1974 29.80%
1975 0.00%
1976 0.00%
1977 30.50%
1978 0.00%
1979 10.10%
1980 20.40%
1981 21.80%
1982 40.20%
1983 9.90%
1984 0.00%
1985 0.00%
1986 30.00%
1987 0.00%
1988 0.00%
1989 0.00%
1990 9.90%
1991 11.40%
1992 0.00%
1993 0.00%
1994 0.00%
1995 19.90%
1996 49.30%
1997 39.90%
1998 0.00%
1999 0.00%
2000 0.00%
2001 0.00%
2002 10.90%
2003 0.00%
2004 34.00%
2005 20.40%
2006 0.00%
2007 0.00%
2008 11.70%
2009 0.00%
2010 0.00%
2011 0.00%
2012 42.20%

*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.