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: Wet Data | Dry Data
Year Wet Dry
1910 0.00% 0.00%
1911 0.00% 0.00%
1912 0.00% 0.00%
1913 0.00% 0.00%
1914 56.50% 0.00%
1915 56.50% 0.00%
1916 47.80% 0.00%
1917 0.00% 0.00%
1918 0.00% 0.00%
1919 0.00% 0.00%
1920 0.00% 0.00%
1921 34.30% 0.00%
1922 0.00% 0.00%
1923 0.00% 0.00%
1924 0.00% 50.30%
1925 0.00% 0.00%
1926 0.00% 24.80%
1927 0.00% 12.60%
1928 0.00% 29.70%
1929 0.00% 26.10%
1930 0.00% 0.00%
1931 0.00% 25.40%
1932 20.60% 8.00%
1933 0.00% 0.00%
1934 0.00% 55.50%
1935 0.00% 13.50%
1936 0.00% 0.00%
1937 0.00% 0.00%
1938 28.30% 0.00%
1939 0.00% 22.00%
1940 0.00% 0.00%
1941 72.70% 0.00%
1942 37.70% 0.00%
1943 11.40% 0.00%
1944 17.00% 0.00%
1945 41.80% 0.00%
1946 13.50% 10.10%
1947 0.00% 0.00%
1948 0.00% 0.00%
1949 0.00% 0.00%
1950 0.00% 29.50%
1951 0.00% 0.00%
1952 5.20% 0.00%
1953 0.00% 12.60%
1954 0.00% 28.60%
1955 0.00% 0.00%
1956 2.50% 3.60%
1957 0.00% 0.00%
1958 5.20% 0.00%
1959 0.00% 30.10%
1960 0.00% 40.90%
1961 0.00% 23.90%
1962 0.00% 0.00%
1963 2.50% 3.60%
1964 0.00% 3.60%
1965 27.30% 0.00%
1966 0.00% 0.00%
1967 20.30% 0.00%
1968 0.00% 0.00%
1969 13.80% 0.00%
1970 0.00% 0.00%
1971 13.50% 0.00%
1972 0.00% 0.00%
1973 0.00% 0.00%
1974 0.00% 0.00%
1975 0.00% 0.00%
1976 0.00% 34.30%
1977 0.00% 28.80%
1978 38.40% 0.00%
1979 33.20% 0.00%
1980 16.20% 0.00%
1981 0.00% 17.00%
1982 61.60% 0.00%
1983 83.00% 0.00%
1984 39.90% 5.20%
1985 0.00% 8.00%
1986 0.00% 0.00%
1987 0.00% 41.40%
1988 0.00% 22.00%
1989 0.00% 22.20%
1990 0.00% 38.40%
1991 0.00% 0.00%
1992 3.60% 11.40%
1993 3.60% 0.00%
1994 0.00% 0.00%
1995 48.10% 0.00%
1996 44.20% 20.60%
1997 23.50% 0.00%
1998 83.00% 0.00%
1999 0.00% 0.00%
2000 0.00% 22.20%
2001 0.00% 37.40%
2002 0.00% 52.20%
2003 0.00% 15.00%
2004 0.00% 0.00%
2005 68.10% 0.00%
2006 0.00% 0.00%
2007 0.00% 62.00%
2008 0.00% 46.90%
2009 0.00% 37.20%
2010 12.60% 0.00%
2011 12.60% 0.00%
2012 0.00% 23.70%

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.