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 0.00% 23.30%
1911 63.10% 0.00%
1912 1.70% 8.00%
1913 9.30% 0.00%
1914 0.00% 1.60%
1915 0.00% 1.70%
1916 0.00% 1.70%
1917 0.00% 70.70%
1918 4.90% 1.50%
1919 17.90% 0.00%
1920 0.00% 11.20%
1921 72.00% 0.00%
1922 63.30% 0.00%
1923 4.90% 0.00%
1924 0.00% 36.50%
1925 17.90% 0.00%
1926 0.00% 3.10%
1927 43.80% 1.50%
1928 0.00% 3.40%
1929 1.60% 1.50%
1930 0.00% 1.60%
1931 4.60% 0.00%
1932 27.80% 0.00%
1933 38.80% 0.00%
1934 0.00% 1.50%
1935 3.30% 0.00%
1936 0.00% 0.00%
1937 0.00% 0.00%
1938 6.50% 0.00%
1939 0.00% 0.00%
1940 0.00% 80.80%
1941 0.00% 1.60%
1942 0.00% 3.40%
1943 0.00% 14.90%
1944 0.00% 0.00%
1945 3.20% 0.00%
1946 11.50% 0.00%
1947 0.00% 0.00%
1948 8.60% 0.00%
1949 72.20% 0.00%
1950 0.00% 0.00%
1951 0.00% 0.00%
1952 0.00% 0.00%
1953 1.50% 0.00%
1954 0.00% 0.00%
1955 0.00% 0.00%
1956 1.50% 3.50%
1957 24.10% 0.00%
1958 0.00% 52.80%
1959 1.70% 0.00%
1960 0.00% 38.50%
1961 0.00% 8.20%
1962 0.00% 4.60%
1963 0.00% 90.00%
1964 0.00% 4.80%
1965 0.00% 0.00%
1966 0.00% 44.40%
1967 0.00% 48.00%
1968 0.00% 89.20%
1969 0.00% 47.10%
1970 0.00% 5.00%
1971 0.00% 0.00%
1972 0.00% 0.00%
1973 6.20% 0.00%
1974 0.00% 0.00%
1975 0.00% 0.00%
1976 0.00% 90.40%
1977 0.00% 6.80%
1978 0.00% 28.80%
1979 0.00% 9.80%
1980 0.00% 1.70%
1981 0.00% 66.50%
1982 8.40% 0.00%
1983 0.00% 13.20%
1984 0.00% 0.00%
1985 4.90% 0.00%
1986 34.10% 0.00%
1987 0.00% 1.70%
1988 0.00% 54.40%
1989 1.70% 0.00%
1990 67.40% 0.00%
1991 83.80% 0.00%
1992 0.00% 0.00%
1993 0.00% 0.00%
1994 10.20% 1.50%
1995 0.00% 0.00%
1996 0.00% 1.60%
1997 6.80% 1.50%
1998 96.70% 0.00%
1999 1.60% 0.00%
2000 0.00% 3.20%
2001 0.00% 0.00%
2002 40.10% 0.00%
2003 4.90% 0.00%
2004 39.50% 0.00%
2005 14.30% 0.00%
2006 12.50% 0.00%
2007 33.80% 0.00%
2008 0.00% 0.00%
2009 8.20% 0.00%
2010 1.50% 6.80%
2011 27.10% 1.70%
2012 85.30% 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.