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 11.10%
1911 32.30%
1912 58.30%
1913 24.90%
1914 6.50%
1915 30.60%
1916 18.40%
1917 48.60%
1918 4.00%
1919 20.00%
1920 25.80%
1921 41.60%
1922 20.20%
1923 6.90%
1924 42.60%
1925 31.20%
1926 30.60%
1927 10.50%
1928 4.60%
1929 27.10%
1930 8.70%
1931 31.40%
1932 16.20%
1933 32.50%
1934 64.30%
1935 2.10%
1936 5.30%
1937 21.60%
1938 8.10%
1939 8.90%
1940 45.90%
1941 18.70%
1942 6.70%
1943 7.60%
1944 19.70%
1945 4.20%
1946 23.00%
1947 17.70%
1948 6.70%
1949 30.80%
1950 24.20%
1951 10.20%
1952 21.30%
1953 20.30%
1954 34.80%
1955 23.80%
1956 4.40%
1957 4.90%
1958 44.20%
1959 5.40%
1960 28.60%
1961 12.80%
1962 3.20%
1963 3.60%
1964 12.20%
1965 13.00%
1966 8.80%
1967 4.50%
1968 10.60%
1969 11.60%
1970 5.00%
1971 5.20%
1972 10.50%
1973 19.50%
1974 8.00%
1975 25.40%
1976 7.10%
1977 4.70%
1978 44.30%
1979 57.50%
1980 2.80%
1981 20.20%
1982 18.20%
1983 24.20%
1984 10.60%
1985 1.80%
1986 27.20%
1987 30.40%
1988 16.60%
1989 7.60%
1990 18.00%
1991 17.80%
1992 23.70%
1993 28.30%
1994 18.00%
1995 2.30%
1996 21.30%
1997 5.70%
1998 25.40%
1999 14.80%
2000 47.10%
2001 3.00%
2002 25.20%
2003 26.00%
2004 9.40%
2005 5.00%
2006 67.00%
2007 25.90%
2008 5.80%
2009 8.80%
2010 11.80%
2011 24.60%
2012 83.10%
2013 11.90%
2014 40.00%

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.