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 4.00% 6.00%
1911 0.00% 78.50%
1912 0.00% 3.80%
1913 0.00% 30.40%
1914 1.90% 0.00%
1915 5.70% 2.00%
1916 0.00% 96.00%
1917 0.00% 13.80%
1918 2.00% 0.00%
1919 0.00% 66.90%
1920 0.00% 17.40%
1921 4.00% 1.90%
1922 0.00% 82.30%
1923 0.00% 0.00%
1924 0.00% 25.30%
1925 28.60% 0.00%
1926 27.10% 0.00%
1927 0.00% 2.00%
1928 0.00% 2.00%
1929 0.00% 90.20%
1930 0.00% 30.90%
1931 0.00% 2.00%
1932 0.00% 15.90%
1933 0.00% 9.90%
1934 88.30% 0.00%
1935 0.00% 25.30%
1936 0.00% 3.80%
1937 0.00% 0.00%
1938 9.70% 0.00%
1939 7.60% 0.00%
1940 71.30% 0.00%
1941 61.50% 0.00%
1942 0.00% 3.90%
1943 0.00% 1.90%
1944 0.00% 4.00%
1945 0.00% 2.00%
1946 0.00% 0.00%
1947 2.00% 0.00%
1948 0.00% 25.00%
1949 0.00% 68.80%
1950 0.00% 22.30%
1951 0.00% 11.10%
1952 0.00% 13.90%
1953 5.70% 0.00%
1954 0.00% 3.80%
1955 0.00% 70.40%
1956 0.00% 2.00%
1957 0.00% 2.00%
1958 80.30% 0.00%
1959 0.00% 0.00%
1960 0.00% 0.00%
1961 2.00% 0.00%
1962 0.00% 0.00%
1963 3.80% 0.00%
1964 0.00% 31.00%
1965 0.00% 0.00%
1966 0.00% 0.00%
1967 7.50% 0.00%
1968 0.00% 0.00%
1969 0.00% 0.00%
1970 0.00% 0.00%
1971 0.00% 3.70%
1972 0.00% 3.70%
1973 6.00% 0.00%
1974 0.00% 0.00%
1975 0.00% 2.00%
1976 0.00% 9.90%
1977 0.00% 0.00%
1978 0.00% 0.00%
1979 2.00% 2.00%
1980 0.00% 0.00%
1981 14.00% 0.00%
1982 0.00% 0.00%
1983 25.60% 0.00%
1984 0.00% 4.00%
1985 0.00% 84.50%
1986 29.20% 0.00%
1987 7.60% 0.00%
1988 0.00% 0.00%
1989 0.00% 4.00%
1990 11.30% 0.00%
1991 3.80% 0.00%
1992 74.30% 0.00%
1993 0.00% 12.00%
1994 24.50% 0.00%
1995 67.30% 0.00%
1996 4.00% 0.00%
1997 49.90% 0.00%
1998 90.20% 0.00%
1999 3.90% 2.00%
2000 10.00% 0.00%
2001 3.80% 0.00%
2002 0.00% 0.00%
2003 83.00% 0.00%
2004 84.20% 0.00%
2005 7.70% 0.00%
2006 9.90% 0.00%
2007 9.80% 0.00%
2008 0.00% 3.90%
2009 0.00% 0.00%
2010 37.70% 0.00%
2011 0.00% 0.00%
2012 27.30% 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.