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 11.64%
1911 9.84%
1912 17.84%
1913 19.72%
1914 18.88%
1915 18.48%
1916 13.38%
1917 26.06%
1918 25.96%
1919 2.56%
1920 14.62%
1921 39.30%
1922 17.24%
1923 24.72%
1924 36.12%
1925 22.06%
1926 35.98%
1927 35.78%
1928 22.38%
1929 16.10%
1930 6.14%
1931 32.04%
1932 17.68%
1933 11.32%
1934 29.32%
1935 13.70%
1936 17.44%
1937 5.54%
1938 24.22%
1939 15.40%
1940 32.74%
1941 30.18%
1942 13.30%
1943 19.32%
1944 12.62%
1945 22.70%
1946 29.86%
1947 41.66%
1948 4.82%
1949 2.42%
1950 27.14%
1951 15.66%
1952 7.10%
1953 10.58%
1954 21.40%
1955 17.50%
1956 19.54%
1957 5.54%
1958 14.16%
1959 3.04%
1960 43.48%
1961 18.42%
1962 4.30%
1963 12.16%
1964 21.86%
1965 4.72%
1966 9.34%
1967 8.90%
1968 5.28%
1969 13.04%
1970 10.40%
1971 25.26%
1972 3.52%
1973 37.82%
1974 21.38%
1975 15.16%
1976 6.52%
1977 51.44%
1978 10.86%
1979 12.08%
1980 8.50%
1981 6.48%
1982 3.76%
1983 32.48%
1984 38.30%
1985 36.38%
1986 19.54%
1987 26.86%
1988 19.36%
1989 10.70%
1990 14.56%
1991 41.60%
1992 9.40%
1993 17.26%
1994 22.48%
1995 13.14%
1996 28.00%
1997 20.66%
1998 24.00%
1999 8.02%
2000 26.58%
2001 5.34%
2002 19.78%
2003 9.14%
2004 39.26%
2005 7.48%
2006 16.40%
2007 37.42%
2008 25.88%
2009 19.58%
2010 43.08%
2011 29.32%
2012 51.02%
2013 23.86%
2014 11.94%

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.