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 2.50% 22.10%
1911 2.20% 10.90%
1912 0.40% 29.70%
1913 4.70% 9.20%
1914 10.20% 6.50%
1915 1.00% 51.50%
1916 1.60% 20.70%
1917 1.50% 39.20%
1918 6.40% 7.10%
1919 9.60% 10.70%
1920 0.60% 23.80%
1921 22.80% 1.20%
1922 8.70% 1.20%
1923 2.70% 11.80%
1924 2.60% 33.80%
1925 6.20% 3.10%
1926 3.70% 10.70%
1927 1.00% 39.80%
1928 1.80% 19.90%
1929 0.60% 18.60%
1930 2.90% 12.00%
1931 14.40% 3.20%
1932 9.60% 1.50%
1933 12.80% 2.90%
1934 36.30% 0.80%
1935 4.70% 3.60%
1936 36.00% 0.90%
1937 12.40% 0.30%
1938 4.20% 1.30%
1939 4.30% 4.00%
1940 6.90% 6.40%
1941 11.60% 7.00%
1942 3.30% 4.50%
1943 23.70% 11.80%
1944 1.00% 20.90%
1945 0.70% 18.40%
1946 0.80% 13.40%
1947 1.50% 9.10%
1948 1.50% 7.10%
1949 17.30% 6.20%
1950 0.30% 43.60%
1951 2.40% 17.10%
1952 14.60% 2.80%
1953 6.30% 4.60%
1954 17.10% 8.50%
1955 10.90% 10.60%
1956 0.90% 5.10%
1957 1.20% 2.80%
1958 11.30% 8.80%
1959 7.20% 1.00%
1960 2.10% 2.10%
1961 18.40% 20.70%
1962 0.20% 14.90%
1963 7.50% 14.90%
1964 0.00% 4.30%
1965 0.10% 16.40%
1966 0.80% 11.30%
1967 6.10% 31.30%
1968 0.30% 6.30%
1969 0.90% 1.90%
1970 3.70% 1.90%
1971 1.50% 2.50%
1972 1.40% 15.20%
1973 7.90% 8.40%
1974 0.20% 20.20%
1975 1.40% 8.80%
1976 0.00% 33.10%
1977 13.90% 0.40%
1978 1.40% 5.50%
1979 0.50% 9.90%
1980 16.60% 4.00%
1981 10.70% 1.10%
1982 1.30% 7.90%
1983 20.50% 3.30%
1984 4.60% 5.30%
1985 1.00% 12.30%
1986 6.30% 0.70%
1987 12.60% 3.20%
1988 20.30% 1.50%
1989 2.60% 5.40%
1990 10.50% 0.40%
1991 14.70% 0.80%
1992 8.80% 36.50%
1993 12.10% 17.70%
1994 12.80% 0.30%
1995 23.00% 3.70%
1996 9.40% 0.30%
1997 6.80% 2.90%
1998 32.30% 0.20%
1999 13.30% 1.00%
2000 11.70% 0.50%
2001 16.50% 0.20%
2002 35.20% 0.20%
2003 32.20% 0.20%
2004 13.60% 21.50%
2005 35.00% 0.70%
2006 45.10% 0.00%
2007 42.70% 1.00%
2008 13.10% 2.10%
2009 14.20% 9.30%
2010 58.80% 1.20%
2011 54.80% 2.00%
2012 38.30% 1.20%

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.