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.

Download: Warm Data | Cold Data
Year Warm Cold
1910 23.90% 0.00%
1911 0.00% 9.50%
1912 0.00% 19.10%
1913 0.00% 0.00%
1914 0.00% 0.00%
1915 0.00% 0.00%
1916 0.00% 53.40%
1917 0.00% 31.40%
1918 5.00% 2.30%
1919 0.00% 0.00%
1920 0.00% 22.40%
1921 90.60% 0.00%
1922 2.50% 0.00%
1923 0.00% 97.50%
1924 0.00% 10.10%
1925 0.00% 5.00%
1926 0.00% 100.00%
1927 0.00% 0.00%
1928 0.00% 37.20%
1929 2.50% 0.00%
1930 0.00% 0.00%
1931 2.30% 0.00%
1932 0.00% 32.50%
1933 0.00% 0.00%
1934 0.00% 22.30%
1935 0.00% 2.40%
1936 9.40% 0.00%
1937 0.00% 0.00%
1938 2.50% 0.00%
1939 0.00% 23.70%
1940 0.00% 44.50%
1941 0.00% 12.50%
1942 77.50% 0.00%
1943 0.00% 29.00%
1944 0.00% 0.00%
1945 58.30% 0.00%
1946 4.90% 0.00%
1947 0.00% 2.40%
1948 0.00% 0.00%
1949 0.00% 0.00%
1950 0.00% 76.00%
1951 0.00% 0.00%
1952 0.00% 0.00%
1953 24.50% 0.00%
1954 0.00% 0.00%
1955 12.40% 0.00%
1956 0.00% 77.50%
1957 0.00% 0.00%
1958 4.70% 0.00%
1959 0.00% 0.00%
1960 0.00% 10.10%
1961 0.00% 0.00%
1962 0.00% 0.00%
1963 0.00% 2.40%
1964 0.00% 0.00%
1965 0.00% 0.00%
1966 0.00% 0.00%
1967 0.00% 80.00%
1968 0.00% 0.00%
1969 0.00% 0.00%
1970 0.00% 0.00%
1971 0.00% 63.90%
1972 0.00% 26.30%
1973 75.70% 0.00%
1974 0.00% 4.70%
1975 0.00% 0.00%
1976 0.00% 0.00%
1977 27.30% 0.00%
1978 0.00% 0.00%
1979 26.10% 0.00%
1980 0.00% 0.00%
1981 4.70% 0.00%
1982 0.00% 0.00%
1983 11.70% 0.00%
1984 0.00% 17.40%
1985 12.50% 0.00%
1986 19.40% 0.00%
1987 12.20% 0.00%
1988 0.00% 0.00%
1989 0.00% 0.00%
1990 2.40% 0.00%
1991 93.10% 0.00%
1992 0.00% 4.90%
1993 0.00% 0.00%
1994 0.00% 0.00%
1995 0.00% 0.00%
1996 0.00% 7.40%
1997 0.00% 26.30%
1998 97.60% 0.00%
1999 9.30% 0.00%
2000 71.20% 0.00%
2001 0.00% 0.00%
2002 0.00% 0.00%
2003 0.00% 6.90%
2004 54.50% 0.00%
2005 0.00% 12.40%
2006 11.80% 0.00%
2007 0.00% 2.40%
2008 0.00% 0.00%
2009 0.00% 0.00%
2010 100.00% 0.00%
2011 44.60% 0.00%
2012 100.00% 0.00%
2013 0.00% 0.00%
2014 0.00% 16.70%

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.