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 17.56%
1911 16.98%
1912 23.28%
1913 13.38%
1914 10.86%
1915 55.48%
1916 27.92%
1917 22.08%
1918 9.78%
1919 38.02%
1920 12.46%
1921 15.16%
1922 11.82%
1923 16.66%
1924 29.22%
1925 9.44%
1926 11.12%
1927 30.32%
1928 38.70%
1929 13.46%
1930 14.00%
1931 34.16%
1932 10.46%
1933 32.26%
1934 32.98%
1935 11.32%
1936 58.26%
1937 27.72%
1938 11.06%
1939 12.18%
1940 25.44%
1941 15.06%
1942 14.80%
1943 11.44%
1944 28.64%
1945 23.16%
1946 6.06%
1947 14.26%
1948 11.54%
1949 6.14%
1950 31.78%
1951 40.16%
1952 9.82%
1953 12.36%
1954 9.46%
1955 8.14%
1956 12.86%
1957 7.74%
1958 17.52%
1959 12.48%
1960 6.80%
1961 36.16%
1962 16.80%
1963 10.16%
1964 9.88%
1965 16.16%
1966 5.20%
1967 21.06%
1968 13.88%
1969 11.66%
1970 24.54%
1971 5.18%
1972 7.22%
1973 11.66%
1974 7.26%
1975 14.96%
1976 18.62%
1977 9.04%
1978 14.12%
1979 7.98%
1980 15.06%
1981 12.64%
1982 11.76%
1983 23.50%
1984 15.08%
1985 12.14%
1986 7.22%
1987 6.44%
1988 55.06%
1989 17.44%
1990 5.64%
1991 16.08%
1992 36.04%
1993 57.82%
1994 13.08%
1995 20.20%
1996 11.90%
1997 14.38%
1998 15.02%
1999 15.76%
2000 15.48%
2001 27.40%
2002 25.68%
2003 23.02%
2004 28.34%
2005 14.10%
2006 34.08%
2007 43.32%
2008 13.80%
2009 26.34%
2010 26.14%
2011 29.34%
2012 41.16%
2013 24.74%
2014 23.40%

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.