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 6.20% 10.70%
1911 6.60% 8.80%
1912 0.00% 42.10%
1913 16.60% 12.50%
1914 13.20% 12.90%
1915 1.70% 51.80%
1916 0.40% 16.50%
1917 5.70% 6.20%
1918 16.20% 1.50%
1919 15.00% 9.40%
1920 1.00% 20.50%
1921 13.00% 8.60%
1922 8.60% 1.60%
1923 1.60% 21.40%
1924 6.20% 13.50%
1925 12.80% 7.40%
1926 8.30% 6.10%
1927 0.90% 42.20%
1928 0.80% 22.60%
1929 2.70% 3.50%
1930 20.20% 0.50%
1931 27.30% 0.80%
1932 6.50% 1.50%
1933 32.20% 0.70%
1934 41.10% 0.70%
1935 3.40% 0.40%
1936 49.60% 0.00%
1937 11.60% 0.20%
1938 7.00% 1.30%
1939 5.30% 0.00%
1940 22.10% 8.70%
1941 0.70% 16.10%
1942 1.30% 3.40%
1943 16.90% 5.90%
1944 8.80% 12.60%
1945 0.20% 19.30%
1946 1.00% 6.40%
1947 0.80% 8.20%
1948 3.30% 4.20%
1949 10.20% 1.30%
1950 0.50% 29.00%
1951 7.90% 29.00%
1952 30.20% 1.10%
1953 16.00% 6.00%
1954 30.00% 10.80%
1955 8.40% 7.30%
1956 9.90% 1.40%
1957 1.40% 2.60%
1958 8.30% 10.30%
1959 9.80% 1.00%
1960 13.50% 0.20%
1961 24.10% 15.00%
1962 1.50% 4.50%
1963 2.40% 8.80%
1964 1.10% 8.40%
1965 0.00% 23.70%
1966 2.10% 2.60%
1967 7.70% 29.30%
1968 0.20% 10.70%
1969 0.70% 0.70%
1970 10.00% 0.30%
1971 0.50% 1.30%
1972 1.00% 12.60%
1973 2.60% 2.60%
1974 2.00% 9.10%
1975 0.60% 11.50%
1976 6.50% 18.40%
1977 5.50% 0.70%
1978 3.10% 0.20%
1979 1.00% 10.30%
1980 31.30% 8.20%
1981 8.00% 1.30%
1982 0.20% 18.80%
1983 16.00% 11.30%
1984 2.50% 7.00%
1985 6.20% 10.80%
1986 3.30% 4.40%
1987 4.70% 1.70%
1988 36.70% 1.90%
1989 1.10% 16.40%
1990 2.00% 0.90%
1991 5.20% 6.10%
1992 2.80% 59.70%
1993 5.20% 34.50%
1994 23.00% 6.50%
1995 7.80% 5.70%
1996 13.50% 4.00%
1997 0.90% 12.10%
1998 15.20% 0.90%
1999 4.50% 3.20%
2000 17.80% 4.30%
2001 13.70% 1.70%
2002 31.20% 0.90%
2003 27.70% 5.00%
2004 4.30% 41.50%
2005 10.00% 0.70%
2006 32.10% 0.00%
2007 31.70% 4.40%
2008 9.70% 1.70%
2009 5.80% 26.90%
2010 16.40% 2.60%
2011 36.70% 2.60%
2012 49.90% 1.10%

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.