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 21.66%
1911 17.26%
1912 33.26%
1913 21.30%
1914 34.54%
1915 37.84%
1916 21.62%
1917 18.08%
1918 12.06%
1919 24.64%
1920 29.06%
1921 29.80%
1922 12.40%
1923 29.18%
1924 24.48%
1925 14.30%
1926 7.72%
1927 17.98%
1928 16.82%
1929 15.66%
1930 10.28%
1931 21.26%
1932 11.04%
1933 10.10%
1934 27.94%
1935 10.74%
1936 19.16%
1937 7.66%
1938 6.48%
1939 16.96%
1940 20.44%
1941 39.18%
1942 14.66%
1943 13.46%
1944 25.64%
1945 12.76%
1946 5.58%
1947 15.26%
1948 11.02%
1949 12.62%
1950 21.24%
1951 18.32%
1952 5.84%
1953 10.20%
1954 15.74%
1955 16.70%
1956 15.84%
1957 16.70%
1958 13.28%
1959 12.86%
1960 19.08%
1961 12.96%
1962 12.70%
1963 16.92%
1964 12.90%
1965 35.44%
1966 7.24%
1967 19.64%
1968 16.86%
1969 2.70%
1970 8.24%
1971 8.26%
1972 10.20%
1973 12.92%
1974 9.22%
1975 15.58%
1976 9.72%
1977 12.16%
1978 14.74%
1979 22.72%
1980 23.84%
1981 14.40%
1982 12.74%
1983 26.96%
1984 32.56%
1985 19.60%
1986 15.58%
1987 14.40%
1988 22.34%
1989 11.74%
1990 11.44%
1991 12.20%
1992 24.30%
1993 21.00%
1994 36.26%
1995 18.00%
1996 28.18%
1997 10.96%
1998 18.38%
1999 16.98%
2000 30.46%
2001 11.20%
2002 51.66%
2003 39.72%
2004 11.52%
2005 13.02%
2006 41.60%
2007 46.58%
2008 18.68%
2009 3.48%
2010 12.26%
2011 35.94%
2012 56.56%
2013 37.86%

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.