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 2.80% 8.40%
1911 0.00% 66.50%
1912 0.00% 42.50%
1913 0.00% 22.70%
1914 5.50% 5.40%
1915 0.00% 0.00%
1916 0.00% 66.60%
1917 0.00% 55.50%
1918 0.00% 11.20%
1919 0.00% 50.10%
1920 0.00% 36.70%
1921 8.20% 2.80%
1922 0.00% 38.50%
1923 0.00% 25.20%
1924 0.00% 41.60%
1925 10.70% 0.00%
1926 19.40% 0.00%
1927 5.50% 5.70%
1928 5.40% 0.00%
1929 0.00% 38.30%
1930 0.00% 21.90%
1931 8.60% 0.00%
1932 0.00% 30.30%
1933 0.00% 41.90%
1934 52.50% 0.00%
1935 0.00% 10.90%
1936 2.90% 0.00%
1937 0.00% 8.10%
1938 0.00% 0.00%
1939 2.70% 0.00%
1940 49.30% 0.00%
1941 24.60% 2.70%
1942 0.00% 2.90%
1943 0.00% 0.00%
1944 0.00% 30.90%
1945 2.70% 0.00%
1946 0.00% 24.80%
1947 0.00% 5.60%
1948 0.00% 83.50%
1949 0.00% 71.70%
1950 2.90% 2.80%
1951 0.00% 3.00%
1952 0.00% 2.70%
1953 0.00% 3.00%
1954 0.00% 0.00%
1955 0.00% 41.20%
1956 0.00% 5.50%
1957 0.00% 0.00%
1958 49.80% 0.00%
1959 8.70% 0.00%
1960 0.00% 0.00%
1961 0.00% 0.00%
1962 0.00% 2.80%
1963 2.70% 0.00%
1964 0.00% 8.50%
1965 0.00% 0.00%
1966 0.00% 0.00%
1967 2.90% 0.00%
1968 0.00% 0.00%
1969 3.00% 0.00%
1970 2.80% 0.00%
1971 0.00% 11.20%
1972 0.00% 0.00%
1973 13.60% 0.00%
1974 2.90% 0.00%
1975 0.00% 14.00%
1976 0.00% 8.20%
1977 2.90% 0.00%
1978 8.50% 0.00%
1979 2.80% 0.00%
1980 2.70% 0.00%
1981 58.60% 0.00%
1982 0.00% 2.70%
1983 60.90% 0.00%
1984 17.50% 0.00%
1985 0.00% 13.40%
1986 49.20% 0.00%
1987 16.50% 0.00%
1988 5.70% 0.00%
1989 0.00% 2.90%
1990 0.00% 2.70%
1991 0.00% 0.00%
1992 77.90% 0.00%
1993 3.00% 5.40%
1994 0.00% 0.00%
1995 58.00% 0.00%
1996 67.10% 0.00%
1997 58.90% 2.90%
1998 10.70% 0.00%
1999 0.00% 5.70%
2000 22.00% 0.00%
2001 30.50% 0.00%
2002 2.70% 0.00%
2003 83.20% 0.00%
2004 41.30% 0.00%
2005 50.50% 0.00%
2006 5.60% 2.90%
2007 8.40% 0.00%
2008 17.30% 0.00%
2009 2.80% 2.90%
2010 8.20% 0.00%
2011 0.00% 0.00%
2012 33.60% 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.