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 15.56%
1911 24.10%
1912 29.06%
1913 24.38%
1914 41.22%
1915 16.56%
1916 19.00%
1917 42.62%
1918 16.22%
1919 1.12%
1920 22.22%
1921 30.36%
1922 10.04%
1923 24.24%
1924 51.00%
1925 9.80%
1926 41.56%
1927 6.70%
1928 10.46%
1929 6.68%
1930 16.40%
1931 34.28%
1932 12.58%
1933 9.54%
1934 20.60%
1935 17.18%
1936 11.02%
1937 13.40%
1938 12.46%
1939 5.84%
1940 39.20%
1941 23.82%
1942 10.22%
1943 15.38%
1944 7.24%
1945 19.94%
1946 18.40%
1947 5.96%
1948 11.18%
1949 35.02%
1950 16.24%
1951 8.30%
1952 16.32%
1953 37.38%
1954 21.20%
1955 12.58%
1956 9.06%
1957 19.78%
1958 30.58%
1959 0.08%
1960 8.30%
1961 1.52%
1962 16.12%
1963 29.24%
1964 18.58%
1965 15.96%
1966 15.14%
1967 5.30%
1968 5.96%
1969 2.76%
1970 3.68%
1971 5.66%
1972 46.02%
1973 31.94%
1974 11.52%
1975 16.52%
1976 25.08%
1977 16.96%
1978 33.38%
1979 20.50%
1980 8.58%
1981 4.82%
1982 5.04%
1983 7.70%
1984 4.30%
1985 13.22%
1986 5.16%
1987 3.52%
1988 5.80%
1989 17.70%
1990 47.06%
1991 39.80%
1992 19.60%
1993 5.86%
1994 10.90%
1995 8.42%
1996 34.56%
1997 9.74%
1998 52.38%
1999 41.18%
2000 12.90%
2001 35.84%
2002 34.94%
2003 32.62%
2004 26.16%
2005 26.36%
2006 64.80%
2007 17.40%
2008 33.50%
2009 18.26%
2010 38.36%
2011 72.56%
2012 50.84%
2013 21.38%

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.