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
1911 6.60% 0.00%
1912 0.00% 23.90%
1913 22.00% 0.00%
1914 0.00% 0.00%
1915 0.00% 16.40%
1916 4.80% 0.00%
1917 0.00% 0.00%
1918 0.00% 58.80%
1919 4.60% 0.00%
1920 0.00% 7.80%
1921 1.50% 0.00%
1922 8.10% 0.00%
1923 24.50% 0.00%
1924 1.50% 0.00%
1925 3.20% 0.00%
1926 0.00% 1.70%
1927 60.60% 0.00%
1928 0.00% 0.00%
1929 1.70% 0.00%
1930 17.10% 0.00%
1931 0.00% 13.60%
1932 100.00% 0.00%
1933 29.20% 0.00%
1934 8.10% 0.00%
1935 0.00% 0.00%
1936 0.00% 90.00%
1937 18.20% 0.00%
1938 0.00% 0.00%
1939 19.20% 0.00%
1940 0.00% 79.50%
1941 0.00% 0.00%
1942 0.00% 0.00%
1943 3.20% 0.00%
1944 1.60% 0.00%
1945 0.00% 0.00%
1946 0.00% 0.00%
1947 0.00% 0.00%
1948 0.00% 1.60%
1949 98.40% 0.00%
1950 98.50% 0.00%
1951 0.00% 0.00%
1952 61.40% 0.00%
1953 7.90% 0.00%
1954 6.20% 0.00%
1955 0.00% 0.00%
1956 0.00% 0.00%
1957 89.00% 0.00%
1958 0.00% 67.00%
1959 0.00% 0.00%
1960 0.00% 0.00%
1961 0.00% 0.00%
1962 1.70% 0.00%
1963 0.00% 73.90%
1964 0.00% 84.40%
1965 0.00% 0.00%
1966 0.00% 1.70%
1967 0.00% 0.00%
1968 0.00% 1.60%
1969 0.00% 25.40%
1970 0.00% 59.70%
1971 0.00% 0.00%
1972 19.70% 0.00%
1973 0.00% 0.00%
1974 48.90% 0.00%
1975 5.20% 0.00%
1976 0.00% 0.00%
1977 0.00% 98.50%
1978 0.00% 100.00%
1979 0.00% 33.80%
1980 0.00% 0.00%
1981 0.00% 5.10%
1982 0.00% 14.10%
1983 0.00% 0.00%
1984 0.00% 4.80%
1985 0.00% 1.70%
1986 0.00% 0.00%
1987 0.00% 5.00%
1988 0.00% 0.00%
1989 8.30% 0.00%
1990 0.00% 0.00%
1991 15.50% 0.00%
1992 15.80% 0.00%
1993 0.00% 0.00%
1994 0.00% 0.00%
1995 0.00% 0.00%
1996 0.00% 0.00%
1997 3.30% 0.00%
1998 1.50% 0.00%
1999 90.50% 0.00%
2000 17.60% 0.00%
2001 0.00% 4.90%
2002 52.10% 0.00%
2003 0.00% 12.40%
2004 0.00% 0.00%
2005 1.60% 0.00%
2006 0.00% 0.00%
2007 6.50% 0.00%
2008 16.40% 0.00%
2009 0.00% 0.00%
2010 0.00% 92.00%
2011 0.00% 19.20%
2012 73.90% 0.00%
2013 23.10% 0.00%
2014 0.00% 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.