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 17.20% 0.00%
1911 0.00% 0.00%
1912 0.00% 33.50%
1913 5.00% 0.00%
1914 0.00% 1.60%
1915 0.00% 1.60%
1916 0.00% 35.50%
1917 0.00% 98.30%
1918 1.70% 0.00%
1919 0.00% 1.50%
1920 0.00% 1.60%
1921 70.60% 0.00%
1922 3.30% 1.60%
1923 0.00% 0.00%
1924 0.00% 58.90%
1925 0.00% 0.00%
1926 0.00% 38.00%
1927 0.00% 16.70%
1928 0.00% 1.60%
1929 0.00% 43.00%
1930 14.60% 0.00%
1931 100.00% 0.00%
1932 0.00% 1.60%
1933 34.30% 0.00%
1934 40.70% 0.00%
1935 0.00% 4.60%
1936 0.00% 15.40%
1937 0.00% 6.10%
1938 14.80% 0.00%
1939 45.60% 0.00%
1940 0.00% 14.40%
1941 12.90% 0.00%
1942 0.00% 0.00%
1943 0.00% 0.00%
1944 0.00% 0.00%
1945 0.00% 3.10%
1946 26.10% 0.00%
1947 0.00% 3.00%
1948 0.00% 0.00%
1949 4.90% 0.00%
1950 0.00% 78.60%
1951 0.00% 85.50%
1952 3.00% 0.00%
1953 21.10% 0.00%
1954 1.70% 0.00%
1955 1.70% 0.00%
1956 1.70% 0.00%
1957 0.00% 0.00%
1958 0.00% 1.70%
1959 0.00% 0.00%
1960 0.00% 1.70%
1961 1.50% 0.00%
1962 0.00% 0.00%
1963 3.00% 0.00%
1964 1.60% 0.00%
1965 0.00% 31.00%
1966 0.00% 4.50%
1967 0.00% 1.60%
1968 0.00% 0.00%
1969 0.00% 14.70%
1970 0.00% 1.50%
1971 0.00% 0.00%
1972 0.00% 85.90%
1973 1.50% 0.00%
1974 0.00% 0.00%
1975 0.00% 0.00%
1976 6.20% 0.00%
1977 0.00% 0.00%
1978 0.00% 18.20%
1979 0.00% 88.90%
1980 0.00% 8.10%
1981 26.60% 0.00%
1982 0.00% 19.50%
1983 0.00% 1.70%
1984 0.00% 0.00%
1985 0.00% 6.50%
1986 1.50% 0.00%
1987 91.80% 0.00%
1988 23.90% 0.00%
1989 0.00% 3.30%
1990 43.50% 0.00%
1991 7.90% 0.00%
1992 0.00% 8.20%
1993 0.00% 46.90%
1994 0.00% 0.00%
1995 0.00% 0.00%
1996 0.00% 84.30%
1997 0.00% 3.30%
1998 80.20% 0.00%
1999 72.40% 0.00%
2000 0.00% 0.00%
2001 40.40% 0.00%
2002 1.60% 0.00%
2003 0.00% 0.00%
2004 0.00% 0.00%
2005 31.30% 0.00%
2006 72.20% 0.00%
2007 15.70% 0.00%
2008 0.00% 21.30%
2009 0.00% 1.70%
2010 50.10% 0.00%
2011 6.10% 0.00%
2012 100.00% 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.