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 0.00% 2.50%
1911 5.00% 4.70%
1912 0.00% 38.90%
1913 5.00% 0.00%
1914 0.00% 72.80%
1915 0.00% 0.00%
1916 0.00% 22.20%
1917 0.00% 97.60%
1918 0.00% 28.80%
1919 0.00% 0.00%
1920 0.00% 14.80%
1921 42.00% 0.00%
1922 0.00% 0.00%
1923 0.00% 67.50%
1924 0.00% 88.30%
1925 0.00% 7.30%
1926 0.00% 87.60%
1927 0.00% 0.00%
1928 0.00% 0.00%
1929 0.00% 0.00%
1930 0.00% 0.00%
1931 46.50% 0.00%
1932 0.00% 0.00%
1933 0.00% 0.00%
1934 0.00% 43.20%
1935 0.00% 9.60%
1936 0.00% 2.40%
1937 0.00% 0.00%
1938 0.00% 0.00%
1939 0.00% 2.30%
1940 0.00% 68.60%
1941 0.00% 2.50%
1942 0.00% 0.00%
1943 0.00% 9.50%
1944 0.00% 0.00%
1945 0.00% 0.00%
1946 0.00% 0.00%
1947 0.00% 0.00%
1948 0.00% 2.50%
1949 53.80% 0.00%
1950 0.00% 0.00%
1951 0.00% 0.00%
1952 9.60% 0.00%
1953 60.30% 0.00%
1954 0.00% 0.00%
1955 0.00% 0.00%
1956 0.00% 0.00%
1957 0.00% 0.00%
1958 0.00% 27.40%
1959 0.00% 0.00%
1960 0.00% 2.50%
1961 0.00% 0.00%
1962 0.00% 34.40%
1963 0.00% 73.90%
1964 0.00% 10.10%
1965 0.00% 4.80%
1966 0.00% 10.00%
1967 0.00% 7.60%
1968 0.00% 2.50%
1969 0.00% 0.00%
1970 0.00% 0.00%
1971 0.00% 0.00%
1972 0.00% 14.10%
1973 63.30% 0.00%
1974 0.00% 0.00%
1975 5.00% 0.00%
1976 0.00% 41.70%
1977 0.00% 0.00%
1978 0.00% 68.50%
1979 9.30% 0.00%
1980 0.00% 2.40%
1981 0.00% 0.00%
1982 0.00% 2.30%
1983 4.60% 0.00%
1984 0.00% 0.00%
1985 0.00% 0.00%
1986 0.00% 0.00%
1987 2.40% 0.00%
1988 0.00% 2.50%
1989 0.00% 11.90%
1990 83.30% 0.00%
1991 51.90% 0.00%
1992 0.00% 0.00%
1993 0.00% 0.00%
1994 0.00% 2.50%
1995 0.00% 0.00%
1996 0.00% 2.50%
1997 0.00% 0.00%
1998 100.00% 0.00%
1999 35.90% 0.00%
2000 0.00% 0.00%
2001 43.90% 0.00%
2002 75.80% 0.00%
2003 0.00% 0.00%
2004 12.60% 0.00%
2005 9.80% 0.00%
2006 97.50% 0.00%
2007 2.60% 0.00%
2008 7.20% 0.00%
2009 0.00% 0.00%
2010 82.60% 0.00%
2011 90.10% 0.00%
2012 100.00% 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.