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 15.70% 0.00%
1911 0.00% 29.00%
1912 0.00% 53.10%
1913 1.10% 20.80%
1914 1.10% 0.00%
1915 0.00% 36.20%
1916 0.00% 66.80%
1917 0.00% 43.10%
1918 1.10% 2.20%
1919 0.00% 12.60%
1920 0.00% 17.90%
1921 24.40% 0.00%
1922 1.10% 13.50%
1923 0.00% 9.60%
1924 0.00% 37.30%
1925 1.90% 2.10%
1926 3.00% 1.10%
1927 0.00% 45.20%
1928 1.00% 0.00%
1929 0.00% 41.00%
1930 1.10% 0.00%
1931 70.10% 0.00%
1932 0.00% 7.40%
1933 28.70% 0.00%
1934 98.10% 0.00%
1935 0.00% 0.00%
1936 0.00% 0.00%
1937 1.00% 1.00%
1938 17.00% 0.00%
1939 64.40% 0.00%
1940 14.40% 0.00%
1941 1.00% 1.10%
1942 0.00% 3.20%
1943 5.40% 1.00%
1944 0.00% 3.20%
1945 0.00% 3.10%
1946 13.00% 0.00%
1947 0.00% 0.00%
1948 0.00% 6.90%
1949 0.00% 0.00%
1950 0.00% 54.20%
1951 0.00% 79.10%
1952 1.00% 0.00%
1953 18.40% 0.00%
1954 28.00% 1.00%
1955 0.00% 19.80%
1956 1.10% 0.00%
1957 0.00% 4.30%
1958 7.10% 1.10%
1959 0.00% 1.90%
1960 0.00% 5.50%
1961 2.00% 0.00%
1962 0.00% 0.00%
1963 15.50% 0.00%
1964 0.00% 7.10%
1965 0.00% 8.00%
1966 0.00% 0.00%
1967 1.90% 0.00%
1968 0.00% 2.10%
1969 0.00% 8.70%
1970 1.10% 0.00%
1971 0.00% 3.10%
1972 0.00% 20.20%
1973 0.00% 4.30%
1974 6.30% 0.00%
1975 0.00% 24.30%
1976 14.20% 0.00%
1977 1.10% 0.00%
1978 0.00% 49.70%
1979 0.00% 17.70%
1980 5.20% 0.00%
1981 60.70% 0.00%
1982 0.00% 45.30%
1983 0.00% 10.80%
1984 0.00% 10.50%
1985 0.00% 33.30%
1986 2.20% 0.00%
1987 65.80% 0.00%
1988 61.80% 0.00%
1989 0.00% 0.00%
1990 21.00% 0.00%
1991 1.00% 0.00%
1992 27.10% 0.00%
1993 0.00% 64.90%
1994 27.90% 0.00%
1995 0.00% 3.00%
1996 0.00% 52.20%
1997 0.00% 0.00%
1998 11.70% 0.00%
1999 54.60% 0.00%
2000 9.80% 0.00%
2001 32.80% 0.00%
2002 1.10% 1.00%
2003 23.80% 0.00%
2004 2.10% 0.00%
2005 13.90% 0.00%
2006 75.80% 0.00%
2007 42.60% 0.00%
2008 0.00% 1.10%
2009 0.00% 7.20%
2010 0.00% 0.00%
2011 2.00% 0.00%
2012 94.20% 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.