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 2.70% 0.00%
1912 0.00% 67.90%
1913 5.30% 0.00%
1914 0.00% 0.00%
1915 0.00% 2.70%
1916 0.00% 1.30%
1917 0.00% 0.00%
1918 0.00% 94.70%
1919 56.40% 0.00%
1920 0.00% 37.40%
1921 35.60% 0.00%
1922 0.00% 0.00%
1923 5.40% 0.00%
1924 0.00% 0.00%
1925 2.70% 0.00%
1926 1.30% 0.00%
1927 5.50% 0.00%
1928 0.00% 0.00%
1929 0.00% 5.20%
1930 9.30% 0.00%
1931 28.50% 0.00%
1932 98.70% 0.00%
1933 40.50% 0.00%
1934 14.50% 0.00%
1935 0.00% 0.00%
1936 0.00% 100.00%
1937 25.30% 1.30%
1938 0.00% 0.00%
1939 9.30% 0.00%
1940 0.00% 41.60%
1941 0.00% 0.00%
1942 0.00% 0.00%
1943 2.70% 0.00%
1944 7.60% 0.00%
1945 0.00% 6.40%
1946 0.00% 0.00%
1947 0.00% 0.00%
1948 0.00% 0.00%
1949 54.30% 0.00%
1950 78.10% 0.00%
1951 0.00% 0.00%
1952 29.60% 0.00%
1953 34.20% 0.00%
1954 81.30% 0.00%
1955 0.00% 0.00%
1956 0.00% 0.00%
1957 8.20% 0.00%
1958 0.00% 5.40%
1959 0.00% 3.80%
1960 0.00% 0.00%
1961 0.00% 0.00%
1962 0.00% 6.50%
1963 0.00% 71.90%
1964 0.00% 10.90%
1965 0.00% 0.00%
1966 0.00% 0.00%
1967 0.00% 0.00%
1968 0.00% 0.00%
1969 0.00% 0.00%
1970 0.00% 36.20%
1971 0.00% 0.00%
1972 6.90% 0.00%
1973 0.00% 1.30%
1974 2.70% 0.00%
1975 0.00% 0.00%
1976 14.60% 0.00%
1977 0.00% 89.50%
1978 0.00% 100.00%
1979 0.00% 97.30%
1980 0.00% 0.00%
1981 0.00% 0.00%
1982 0.00% 41.80%
1983 32.10% 0.00%
1984 0.00% 14.80%
1985 0.00% 1.30%
1986 0.00% 0.00%
1987 5.10% 0.00%
1988 0.00% 0.00%
1989 0.00% 0.00%
1990 0.00% 0.00%
1991 0.00% 0.00%
1992 51.20% 0.00%
1993 0.00% 0.00%
1994 0.00% 1.30%
1995 0.00% 0.00%
1996 0.00% 0.00%
1997 1.30% 0.00%
1998 36.00% 0.00%
1999 68.50% 0.00%
2000 38.30% 0.00%
2001 0.00% 17.20%
2002 91.80% 0.00%
2003 0.00% 19.80%
2004 0.00% 0.00%
2005 0.00% 0.00%
2006 5.30% 0.00%
2007 0.00% 0.00%
2008 1.40% 1.30%
2009 0.00% 0.00%
2010 0.00% 65.20%
2011 0.00% 11.90%
2012 97.30% 0.00%
2013 5.30% 0.00%
2014 0.00% 40.10%

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.