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 27.40% 8.40%
1911 0.00% 61.00%
1912 0.00% 41.90%
1913 2.80% 27.80%
1914 2.90% 0.00%
1915 0.00% 11.50%
1916 0.00% 53.60%
1917 5.60% 5.30%
1918 2.80% 8.50%
1919 8.30% 8.20%
1920 2.90% 36.50%
1921 11.20% 0.00%
1922 0.00% 44.30%
1923 0.00% 13.70%
1924 14.00% 0.00%
1925 2.80% 0.00%
1926 63.20% 0.00%
1927 0.00% 5.70%
1928 11.20% 0.00%
1929 11.30% 0.00%
1930 2.80% 8.10%
1931 31.00% 0.00%
1932 0.00% 8.10%
1933 2.70% 3.00%
1934 71.50% 0.00%
1935 2.90% 2.70%
1936 38.60% 0.00%
1937 0.00% 0.00%
1938 0.00% 16.80%
1939 49.40% 0.00%
1940 22.20% 0.00%
1941 0.00% 11.40%
1942 0.00% 0.00%
1943 2.80% 0.00%
1944 0.00% 33.50%
1945 0.00% 2.70%
1946 0.00% 0.00%
1947 0.00% 0.00%
1948 0.00% 38.00%
1949 0.00% 2.80%
1950 8.40% 0.00%
1951 0.00% 8.40%
1952 0.00% 17.00%
1953 0.00% 2.70%
1954 8.20% 5.50%
1955 0.00% 16.80%
1956 0.00% 2.70%
1957 0.00% 13.50%
1958 39.20% 0.00%
1959 67.20% 0.00%
1960 5.60% 0.00%
1961 2.70% 0.00%
1962 0.00% 3.00%
1963 0.00% 33.40%
1964 0.00% 8.20%
1965 0.00% 39.70%
1966 5.40% 0.00%
1967 0.00% 0.00%
1968 0.00% 0.00%
1969 0.00% 3.00%
1970 2.70% 0.00%
1971 0.00% 44.10%
1972 0.00% 5.50%
1973 0.00% 14.40%
1974 0.00% 2.80%
1975 0.00% 52.20%
1976 5.70% 2.80%
1977 0.00% 0.00%
1978 0.00% 14.10%
1979 0.00% 0.00%
1980 0.00% 0.00%
1981 22.00% 0.00%
1982 0.00% 80.40%
1983 0.00% 46.80%
1984 17.00% 16.20%
1985 0.00% 11.20%
1986 16.40% 0.00%
1987 18.80% 0.00%
1988 35.60% 0.00%
1989 8.50% 0.00%
1990 2.80% 0.00%
1991 2.70% 0.00%
1992 52.00% 0.00%
1993 0.00% 21.70%
1994 0.00% 0.00%
1995 0.00% 0.00%
1996 22.70% 0.00%
1997 25.60% 0.00%
1998 0.00% 58.10%
1999 5.40% 0.00%
2000 14.10% 0.00%
2001 46.80% 0.00%
2002 32.90% 0.00%
2003 44.40% 0.00%
2004 16.50% 0.00%
2005 0.00% 2.70%
2006 17.10% 2.80%
2007 42.20% 0.00%
2008 37.00% 0.00%
2009 14.50% 0.00%
2010 0.00% 11.20%
2011 2.70% 5.70%
2012 66.70% 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.