U.S. Climate Extremes Index (CEI)

NCDC transitioned to the nClimDiv dataset on Thursday, March 13, 2014. This was coincident with the release of the February 2014 monthly monitoring report. For details on this transition, please visit our public FTP site and our U.S. Climate Divisional Database site.

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 18.22%
1911 30.90%
1912 37.06%
1913 18.16%
1914 18.56%
1915 24.72%
1916 23.32%
1917 30.12%
1918 18.34%
1919 18.60%
1920 21.52%
1921 25.98%
1922 16.94%
1923 14.62%
1924 33.28%
1925 20.96%
1926 16.84%
1927 18.70%
1928 13.48%
1929 25.24%
1930 11.90%
1931 27.42%
1932 12.42%
1933 21.26%
1934 38.52%
1935 12.54%
1936 17.10%
1937 16.42%
1938 17.26%
1939 13.46%
1940 29.64%
1941 23.94%
1942 18.00%
1943 13.78%
1944 13.40%
1945 12.58%
1946 10.62%
1947 8.64%
1948 14.72%
1949 19.74%
1950 21.84%
1951 20.06%
1952 12.96%
1953 17.80%
1954 28.16%
1955 21.32%
1956 16.72%
1957 13.06%
1958 24.04%
1959 9.34%
1960 14.86%
1961 15.24%
1962 7.88%
1963 14.04%
1964 19.70%
1965 23.36%
1966 16.02%
1967 9.36%
1968 14.36%
1969 10.50%
1970 10.26%
1971 13.44%
1972 12.00%
1973 25.66%
1974 13.78%
1975 20.86%
1976 11.80%
1977 11.06%
1978 25.66%
1979 31.04%
1980 12.26%
1981 18.82%
1982 18.70%
1983 26.04%
1984 18.06%
1985 12.72%
1986 19.80%
1987 20.58%
1988 20.48%
1989 14.26%
1990 24.42%
1991 20.54%
1992 21.82%
1993 26.28%
1994 18.98%
1995 16.00%
1996 23.48%
1997 18.40%
1998 36.82%
1999 21.68%
2000 30.88%
2001 15.62%
2002 25.76%
2003 24.84%
2004 16.82%
2005 21.70%
2006 33.66%
2007 31.24%
2008 17.22%
2009 14.96%
2010 24.50%
2011 33.46%
2012 45.56%
2013 21.98%
2014 30.88%

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.