U.S. Climate Extremes Index (CEI)

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 27.30% 2.90%
1911 14.50% 8.30%
1912 1.40% 62.20%
1913 1.50% 53.50%
1914 18.80% 1.40%
1915 1.30% 22.90%
1916 4.40% 30.40%
1917 0.00% 46.50%
1918 6.80% 4.30%
1919 0.00% 16.70%
1920 1.50% 15.70%
1921 24.30% 0.00%
1922 4.40% 12.40%
1923 2.90% 11.00%
1924 0.00% 57.40%
1925 12.80% 1.50%
1926 9.90% 0.00%
1927 17.30% 1.50%
1928 8.50% 1.40%
1929 0.00% 26.20%
1930 0.00% 26.40%
1931 7.20% 6.80%
1932 0.00% 41.40%
1933 1.50% 14.00%
1934 58.90% 0.00%
1935 4.30% 1.50%
1936 9.80% 0.00%
1937 1.50% 7.00%
1938 6.70% 1.50%
1939 0.00% 4.20%
1940 30.60% 0.00%
1941 7.10% 1.50%
1942 0.00% 11.00%
1943 7.00% 0.00%
1944 0.00% 37.70%
1945 0.00% 8.70%
1946 2.80% 1.40%
1947 0.00% 4.30%
1948 0.00% 25.40%
1949 0.00% 30.40%
1950 0.00% 2.80%
1951 0.00% 12.30%
1952 0.00% 9.70%
1953 0.00% 14.60%
1954 17.00% 0.00%
1955 0.00% 32.30%
1956 0.00% 23.00%
1957 11.50% 1.40%
1958 8.40% 0.00%
1959 0.00% 1.40%
1960 0.00% 5.70%
1961 0.00% 5.70%
1962 0.00% 4.20%
1963 0.00% 0.00%
1964 0.00% 56.70%
1965 0.00% 1.50%
1966 0.00% 7.20%
1967 1.30% 7.30%
1968 0.00% 11.30%
1969 2.80% 0.00%
1970 0.00% 11.60%
1971 0.00% 26.00%
1972 0.00% 0.00%
1973 0.00% 25.80%
1974 0.00% 9.90%
1975 0.00% 47.20%
1976 0.00% 20.10%
1977 5.50% 0.00%
1978 5.90% 0.00%
1979 0.00% 17.20%
1980 4.10% 0.00%
1981 66.90% 0.00%
1982 0.00% 1.40%
1983 16.40% 0.00%
1984 0.00% 6.80%
1985 0.00% 6.70%
1986 44.30% 0.00%
1987 1.30% 5.90%
1988 0.00% 1.50%
1989 4.40% 4.20%
1990 5.50% 1.50%
1991 1.40% 0.00%
1992 2.90% 1.40%
1993 0.00% 6.70%
1994 28.90% 0.00%
1995 20.90% 0.00%
1996 32.80% 0.00%
1997 7.20% 1.30%
1998 20.50% 0.00%
1999 15.20% 0.00%
2000 78.70% 0.00%
2001 46.20% 0.00%
2002 2.90% 2.80%
2003 81.40% 0.00%
2004 15.70% 0.00%
2005 60.70% 0.00%
2006 29.90% 0.00%
2007 34.30% 0.00%
2008 4.40% 1.30%
2009 10.30% 0.00%
2010 25.60% 1.30%
2011 8.50% 1.30%
2012 77.20% 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.