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 14.14%
1911 18.60%
1912 24.36%
1913 24.30%
1914 9.32%
1915 11.18%
1916 21.16%
1917 19.82%
1918 8.26%
1919 19.54%
1920 11.46%
1921 12.56%
1922 7.32%
1923 23.52%
1924 25.70%
1925 9.30%
1926 11.02%
1927 5.06%
1928 7.52%
1929 11.22%
1930 6.04%
1931 24.38%
1932 4.46%
1933 12.12%
1934 16.30%
1935 6.10%
1936 13.06%
1937 5.64%
1938 13.96%
1939 6.32%
1940 9.34%
1941 25.24%
1942 12.92%
1943 25.06%
1944 27.50%
1945 13.08%
1946 1.10%
1947 26.44%
1948 12.66%
1949 14.82%
1950 9.38%
1951 10.52%
1952 14.08%
1953 17.46%
1954 21.40%
1955 8.08%
1956 1.72%
1957 2.80%
1958 27.88%
1959 17.86%
1960 19.52%
1961 23.70%
1962 2.26%
1963 19.42%
1964 7.98%
1965 33.70%
1966 6.02%
1967 17.24%
1968 4.76%
1969 3.12%
1970 7.68%
1971 7.66%
1972 14.98%
1973 1.16%
1974 9.88%
1975 5.32%
1976 37.18%
1977 17.32%
1978 15.80%
1979 7.80%
1980 14.38%
1981 20.78%
1982 14.78%
1983 42.56%
1984 17.56%
1985 9.72%
1986 9.96%
1987 8.12%
1988 9.08%
1989 3.76%
1990 9.10%
1991 4.94%
1992 22.84%
1993 25.38%
1994 16.50%
1995 23.76%
1996 27.30%
1997 21.50%
1998 21.70%
1999 3.36%
2000 17.58%
2001 20.70%
2002 22.16%
2003 32.38%
2004 9.72%
2005 21.68%
2006 32.20%
2007 36.64%
2008 26.72%
2009 13.26%
2010 5.90%
2011 19.38%
2012 26.76%
2013 36.62%
2014 38.94%

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.