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 19.42%
1911 11.92%
1912 24.66%
1913 12.30%
1914 16.88%
1915 23.22%
1916 12.02%
1917 13.56%
1918 22.74%
1919 10.58%
1920 24.46%
1921 29.22%
1922 20.64%
1923 13.38%
1924 26.18%
1925 21.60%
1926 41.30%
1927 22.50%
1928 17.48%
1929 39.18%
1930 7.98%
1931 44.38%
1932 14.64%
1933 6.48%
1934 11.52%
1935 23.50%
1936 17.06%
1937 6.42%
1938 26.12%
1939 2.92%
1940 20.36%
1941 26.28%
1942 21.68%
1943 6.20%
1944 12.88%
1945 41.00%
1946 19.36%
1947 17.02%
1948 32.86%
1949 8.60%
1950 6.82%
1951 7.36%
1952 6.06%
1953 10.78%
1954 4.12%
1955 40.08%
1956 9.56%
1957 9.48%
1958 33.60%
1959 10.42%
1960 53.16%
1961 17.96%
1962 5.92%
1963 14.30%
1964 22.56%
1965 10.18%
1966 13.16%
1967 20.46%
1968 2.00%
1969 26.12%
1970 4.56%
1971 37.64%
1972 7.34%
1973 32.36%
1974 7.86%
1975 22.42%
1976 14.96%
1977 26.50%
1978 11.68%
1979 15.38%
1980 27.22%
1981 14.24%
1982 3.82%
1983 42.32%
1984 30.62%
1985 20.58%
1986 28.02%
1987 9.26%
1988 13.58%
1989 10.20%
1990 14.06%
1991 40.90%
1992 11.76%
1993 28.26%
1994 12.60%
1995 16.12%
1996 12.38%
1997 9.14%
1998 25.64%
1999 10.28%
2000 25.66%
2001 13.84%
2002 23.06%
2003 37.50%
2004 28.90%
2005 13.66%
2006 14.26%
2007 42.26%
2008 14.76%
2009 12.40%
2010 14.44%
2011 23.40%
2012 57.08%
2013 28.74%

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.