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 8.30% 1.00%
1911 0.00% 28.90%
1912 0.00% 33.80%
1913 0.00% 20.50%
1914 1.10% 0.00%
1915 6.00% 5.40%
1916 0.00% 89.50%
1917 0.00% 72.20%
1918 1.00% 1.10%
1919 0.00% 10.10%
1920 1.00% 0.00%
1921 29.60% 0.00%
1922 1.00% 18.10%
1923 2.10% 4.30%
1924 0.00% 55.90%
1925 24.60% 0.00%
1926 12.40% 0.00%
1927 1.10% 17.20%
1928 0.00% 3.10%
1929 0.00% 63.20%
1930 0.00% 4.10%
1931 45.20% 0.00%
1932 0.00% 10.60%
1933 5.30% 0.00%
1934 66.20% 0.00%
1935 0.00% 4.00%
1936 0.00% 15.10%
1937 0.00% 7.10%
1938 10.70% 0.00%
1939 5.10% 0.00%
1940 26.90% 0.00%
1941 45.40% 0.00%
1942 0.00% 5.30%
1943 0.00% 5.00%
1944 0.00% 6.40%
1945 0.00% 3.10%
1946 6.40% 0.00%
1947 1.00% 0.00%
1948 0.00% 6.30%
1949 0.00% 26.00%
1950 0.00% 70.00%
1951 0.00% 80.10%
1952 0.00% 9.50%
1953 26.60% 0.00%
1954 7.40% 0.00%
1955 0.00% 32.30%
1956 0.00% 1.10%
1957 0.00% 0.90%
1958 11.80% 0.00%
1959 0.00% 0.00%
1960 0.00% 10.70%
1961 1.00% 0.00%
1962 0.00% 1.10%
1963 6.30% 0.00%
1964 0.00% 11.80%
1965 0.00% 8.90%
1966 0.00% 14.70%
1967 4.10% 1.10%
1968 0.00% 3.30%
1969 0.00% 6.00%
1970 0.00% 1.00%
1971 0.00% 1.10%
1972 0.00% 1.00%
1973 3.10% 3.20%
1974 1.00% 0.00%
1975 0.00% 7.10%
1976 0.00% 2.10%
1977 3.20% 0.00%
1978 0.00% 42.10%
1979 0.00% 35.40%
1980 3.10% 0.00%
1981 65.70% 0.00%
1982 0.00% 10.00%
1983 9.30% 0.00%
1984 1.00% 5.40%
1985 0.00% 47.80%
1986 45.50% 0.00%
1987 56.40% 0.00%
1988 4.90% 0.00%
1989 0.00% 7.60%
1990 1.90% 1.10%
1991 26.60% 0.00%
1992 12.80% 0.00%
1993 0.00% 16.80%
1994 9.50% 0.00%
1995 8.30% 0.00%
1996 0.00% 39.60%
1997 3.90% 1.10%
1998 82.40% 0.00%
1999 67.70% 0.00%
2000 3.30% 0.00%
2001 32.70% 0.00%
2002 1.00% 1.10%
2003 24.00% 0.00%
2004 16.20% 0.00%
2005 39.80% 0.00%
2006 69.70% 0.00%
2007 44.40% 0.00%
2008 0.00% 4.20%
2009 0.00% 1.10%
2010 13.40% 0.00%
2011 6.00% 1.10%
2012 81.60% 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.