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 16.32%
1911 18.86%
1912 34.70%
1913 16.20%
1914 10.94%
1915 32.04%
1916 11.68%
1917 24.06%
1918 18.40%
1919 7.58%
1920 12.48%
1921 23.48%
1922 23.28%
1923 27.84%
1924 31.76%
1925 17.00%
1926 27.90%
1927 45.90%
1928 20.70%
1929 28.14%
1930 16.66%
1931 13.50%
1932 10.24%
1933 20.88%
1934 22.54%
1935 3.86%
1936 19.84%
1937 20.06%
1938 17.70%
1939 7.14%
1940 3.94%
1941 13.88%
1942 7.66%
1943 14.04%
1944 19.74%
1945 13.82%
1946 26.16%
1947 12.76%
1948 3.56%
1949 60.64%
1950 16.20%
1951 6.98%
1952 23.30%
1953 25.26%
1954 23.46%
1955 39.86%
1956 14.62%
1957 20.16%
1958 24.40%
1959 17.78%
1960 7.72%
1961 4.44%
1962 14.06%
1963 14.96%
1964 16.70%
1965 34.02%
1966 29.26%
1967 5.06%
1968 3.68%
1969 3.08%
1970 5.12%
1971 10.82%
1972 36.94%
1973 40.98%
1974 11.64%
1975 16.58%
1976 15.28%
1977 8.52%
1978 6.34%
1979 10.68%
1980 6.32%
1981 7.70%
1982 24.42%
1983 15.50%
1984 7.98%
1985 14.64%
1986 17.58%
1987 6.64%
1988 18.36%
1989 16.06%
1990 9.94%
1991 26.52%
1992 30.60%
1993 2.90%
1994 19.28%
1995 41.94%
1996 14.14%
1997 9.18%
1998 12.30%
1999 30.70%
2000 24.42%
2001 14.48%
2002 27.40%
2003 23.54%
2004 32.10%
2005 51.72%
2006 40.84%
2007 10.18%
2008 26.92%
2009 39.26%
2010 32.84%
2011 49.70%
2012 27.20%
2013 26.00%

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.