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 40.56%
1911 14.00%
1912 33.42%
1913 17.84%
1914 11.94%
1915 26.78%
1916 20.24%
1917 46.24%
1918 14.28%
1919 15.24%
1920 33.36%
1921 8.22%
1922 26.24%
1923 15.22%
1924 18.46%
1925 25.28%
1926 23.92%
1927 10.74%
1928 11.38%
1929 14.16%
1930 3.82%
1931 8.42%
1932 10.56%
1933 23.92%
1934 52.22%
1935 13.30%
1936 15.12%
1937 5.40%
1938 9.30%
1939 5.56%
1940 14.08%
1941 38.64%
1942 30.28%
1943 9.74%
1944 18.74%
1945 9.04%
1946 5.74%
1947 11.12%
1948 13.74%
1949 1.74%
1950 11.18%
1951 9.52%
1952 14.18%
1953 9.66%
1954 14.10%
1955 23.24%
1956 15.08%
1957 23.36%
1958 20.46%
1959 10.82%
1960 2.96%
1961 6.72%
1962 3.40%
1963 11.08%
1964 19.70%
1965 21.18%
1966 20.32%
1967 10.34%
1968 5.66%
1969 3.98%
1970 14.54%
1971 15.32%
1972 34.16%
1973 38.98%
1974 15.84%
1975 32.90%
1976 0.58%
1977 13.62%
1978 11.34%
1979 14.10%
1980 22.06%
1981 8.92%
1982 4.20%
1983 36.62%
1984 13.98%
1985 19.60%
1986 11.80%
1987 15.66%
1988 9.50%
1989 41.88%
1990 18.36%
1991 14.50%
1992 42.76%
1993 12.52%
1994 13.46%
1995 14.76%
1996 33.42%
1997 11.52%
1998 12.32%
1999 7.50%
2000 39.48%
2001 19.10%
2002 37.22%
2003 14.04%
2004 45.98%
2005 16.64%
2006 22.90%
2007 27.96%
2008 12.72%
2009 10.62%
2010 8.14%
2011 23.34%
2012 48.54%
2013 32.16%
2014 19.14%

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.