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 2.00% 11.50%
1911 0.00% 44.80%
1912 0.00% 56.80%
1913 0.00% 59.60%
1914 0.00% 2.00%
1915 2.00% 2.00%
1916 0.00% 74.10%
1917 0.00% 9.70%
1918 3.80% 2.00%
1919 0.00% 11.60%
1920 0.00% 31.10%
1921 2.00% 5.60%
1922 0.00% 49.90%
1923 0.00% 7.80%
1924 3.80% 2.00%
1925 31.90% 0.00%
1926 57.70% 0.00%
1927 0.00% 23.00%
1928 1.80% 0.00%
1929 2.00% 3.80%
1930 0.00% 5.90%
1931 3.90% 2.00%
1932 0.00% 7.80%
1933 0.00% 11.50%
1934 96.00% 0.00%
1935 0.00% 4.00%
1936 7.90% 0.00%
1937 0.00% 3.90%
1938 3.70% 2.00%
1939 57.60% 0.00%
1940 45.60% 0.00%
1941 22.70% 0.00%
1942 0.00% 2.00%
1943 0.00% 3.80%
1944 1.90% 3.90%
1945 0.00% 0.00%
1946 0.00% 2.00%
1947 1.80% 0.00%
1948 0.00% 68.70%
1949 0.00% 0.00%
1950 0.00% 30.00%
1951 0.00% 0.00%
1952 3.80% 2.00%
1953 9.30% 0.00%
1954 0.00% 15.00%
1955 0.00% 88.00%
1956 0.00% 5.70%
1957 0.00% 3.90%
1958 68.30% 0.00%
1959 2.00% 3.70%
1960 0.00% 0.00%
1961 0.00% 0.00%
1962 0.00% 0.00%
1963 0.00% 0.00%
1964 0.00% 49.50%
1965 0.00% 0.00%
1966 9.80% 0.00%
1967 28.30% 0.00%
1968 0.00% 0.00%
1969 0.00% 1.90%
1970 0.00% 0.00%
1971 0.00% 19.60%
1972 0.00% 0.00%
1973 0.00% 0.00%
1974 0.00% 0.00%
1975 0.00% 44.40%
1976 0.00% 0.00%
1977 0.00% 0.00%
1978 0.00% 3.70%
1979 0.00% 0.00%
1980 0.00% 3.80%
1981 2.00% 0.00%
1982 0.00% 33.70%
1983 0.00% 4.00%
1984 0.00% 44.40%
1985 0.00% 53.70%
1986 6.00% 0.00%
1987 86.30% 0.00%
1988 25.80% 0.00%
1989 0.00% 0.00%
1990 5.80% 0.00%
1991 2.00% 0.00%
1992 96.30% 0.00%
1993 0.00% 48.50%
1994 40.10% 0.00%
1995 22.70% 0.00%
1996 0.00% 7.30%
1997 11.80% 1.80%
1998 33.80% 0.00%
1999 7.90% 0.00%
2000 4.00% 0.00%
2001 14.00% 1.80%
2002 20.00% 0.00%
2003 90.70% 0.00%
2004 41.70% 0.00%
2005 7.70% 0.00%
2006 32.90% 0.00%
2007 33.60% 0.00%
2008 0.00% 3.70%
2009 4.00% 0.00%
2010 0.00% 0.00%
2011 2.00% 11.30%
2012 35.50% 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.