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 77.40% 0.00%
1911 0.00% 2.00%
1912 0.00% 25.70%
1913 0.00% 20.90%
1914 26.70% 0.00%
1915 18.90% 0.00%
1916 0.00% 7.40%
1917 0.00% 100.00%
1918 0.00% 0.00%
1919 0.00% 1.90%
1920 0.00% 63.60%
1921 0.00% 4.00%
1922 0.00% 77.10%
1923 0.00% 7.80%
1924 26.40% 0.00%
1925 22.50% 0.00%
1926 90.10% 0.00%
1927 0.00% 29.00%
1928 0.00% 0.00%
1929 0.00% 5.80%
1930 3.80% 0.00%
1931 31.00% 0.00%
1932 0.00% 0.00%
1933 0.00% 34.90%
1934 98.00% 0.00%
1935 0.00% 4.00%
1936 5.80% 0.00%
1937 0.00% 0.00%
1938 0.00% 2.00%
1939 50.50% 0.00%
1940 55.30% 0.00%
1941 48.90% 0.00%
1942 0.00% 2.00%
1943 0.00% 0.00%
1944 0.00% 0.00%
1945 0.00% 7.80%
1946 0.00% 2.00%
1947 74.60% 0.00%
1948 0.00% 71.10%
1949 23.20% 0.00%
1950 0.00% 33.60%
1951 0.00% 0.00%
1952 0.00% 2.00%
1953 0.00% 8.00%
1954 0.00% 1.80%
1955 0.00% 100.00%
1956 0.00% 0.00%
1957 0.00% 0.00%
1958 5.50% 0.00%
1959 0.00% 0.00%
1960 0.00% 1.80%
1961 0.00% 2.00%
1962 0.00% 13.20%
1963 0.00% 0.00%
1964 0.00% 42.40%
1965 0.00% 0.00%
1966 15.80% 0.00%
1967 0.00% 40.10%
1968 0.00% 0.00%
1969 1.90% 0.00%
1970 0.00% 11.50%
1971 0.00% 13.80%
1972 0.00% 0.00%
1973 1.80% 0.00%
1974 0.00% 20.70%
1975 0.00% 81.10%
1976 0.00% 1.80%
1977 0.00% 0.00%
1978 0.00% 2.00%
1979 0.00% 0.00%
1980 0.00% 0.00%
1981 0.00% 0.00%
1982 0.00% 4.00%
1983 11.10% 0.00%
1984 0.00% 5.80%
1985 0.00% 0.00%
1986 2.00% 0.00%
1987 75.60% 0.00%
1988 2.00% 0.00%
1989 2.00% 0.00%
1990 4.00% 0.00%
1991 0.00% 17.70%
1992 100.00% 0.00%
1993 0.00% 0.00%
1994 57.90% 0.00%
1995 1.80% 0.00%
1996 0.00% 3.70%
1997 8.00% 1.80%
1998 0.00% 6.00%
1999 2.00% 3.80%
2000 5.90% 0.00%
2001 5.90% 0.00%
2002 0.00% 9.20%
2003 2.00% 0.00%
2004 71.10% 0.00%
2005 13.40% 0.00%
2006 0.00% 0.00%
2007 37.70% 0.00%
2008 0.00% 13.20%
2009 0.00% 0.00%
2010 0.00% 6.00%
2011 0.00% 78.40%
2012 6.00% 0.00%
2013 5.90% 0.00%

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.