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 19.62%
1911 11.70%
1912 24.20%
1913 11.28%
1914 16.28%
1915 23.10%
1916 12.24%
1917 14.00%
1918 22.84%
1919 9.80%
1920 22.94%
1921 28.08%
1922 20.70%
1923 13.22%
1924 26.24%
1925 20.86%
1926 41.32%
1927 21.96%
1928 17.08%
1929 39.94%
1930 7.40%
1931 44.44%
1932 14.02%
1933 5.64%
1934 11.88%
1935 23.70%
1936 15.62%
1937 7.44%
1938 26.58%
1939 3.06%
1940 20.52%
1941 26.92%
1942 21.28%
1943 6.18%
1944 13.70%
1945 41.32%
1946 18.08%
1947 17.22%
1948 33.20%
1949 8.68%
1950 7.00%
1951 7.38%
1952 5.94%
1953 11.06%
1954 4.16%
1955 39.48%
1956 9.90%
1957 10.00%
1958 33.00%
1959 10.80%
1960 53.70%
1961 18.00%
1962 5.74%
1963 14.66%
1964 21.82%
1965 10.36%
1966 13.12%
1967 20.56%
1968 2.04%
1969 25.54%
1970 4.72%
1971 37.24%
1972 7.30%
1973 31.92%
1974 7.96%
1975 22.24%
1976 15.44%
1977 27.20%
1978 11.16%
1979 15.04%
1980 26.66%
1981 14.88%
1982 4.92%
1983 42.76%
1984 30.50%
1985 20.80%
1986 28.10%
1987 8.92%
1988 13.74%
1989 10.46%
1990 14.50%
1991 39.98%
1992 10.90%
1993 27.56%
1994 13.20%
1995 15.58%
1996 12.00%
1997 8.50%
1998 25.74%
1999 9.54%
2000 25.78%
2001 13.36%
2002 22.54%
2003 37.10%
2004 28.96%
2005 12.66%
2006 15.56%
2007 42.42%
2008 14.54%
2009 11.94%
2010 14.58%
2011 23.56%
2012 56.76%
2013 27.82%
2014 22.08%

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.