U.S. Climate Extremes Index (CEI): Graph

NCDC transitioned to the nClimDiv dataset on Thursday, March 13, 2014. This was coincident with the release of the February 2014 monthly monitoring report. For details on this transition, please visit our public FTP site and our U.S. Climate Divisional Database site.

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: xml csv json
Year Wet Dry
1910 17.80% 4.60%
1911 0.20% 27.90%
1912 3.70% 3.50%
1913 10.20% 0.30%
1914 14.70% 5.60%
1915 14.00% 4.40%
1916 40.30% 0.10%
1917 15.00% 3.00%
1918 1.50% 16.90%
1919 1.50% 0.80%
1920 21.30% 4.30%
1921 12.30% 0.80%
1922 3.80% 4.20%
1923 0.90% 4.70%
1924 14.10% 2.30%
1925 5.10% 8.00%
1926 1.30% 5.30%
1927 9.40% 4.60%
1928 18.40% 3.90%
1929 13.90% 6.30%
1930 7.40% 7.10%
1931 4.10% 28.50%
1932 5.20% 12.40%
1933 3.80% 2.00%
1934 1.40% 25.30%
1935 1.00% 37.30%
1936 3.50% 8.00%
1937 5.70% 24.50%
1938 1.30% 12.90%
1939 4.60% 8.00%
1940 0.00% 40.90%
1941 6.30% 7.70%
1942 28.80% 11.30%
1943 14.90% 1.60%
1944 0.10% 9.90%
1945 4.10% 9.60%
1946 11.70% 0.00%
1947 12.50% 1.90%
1948 10.10% 5.80%
1949 8.80% 2.00%
1950 6.40% 3.10%
1951 9.80% 11.30%
1952 20.90% 12.40%
1953 1.40% 14.20%
1954 3.50% 25.20%
1955 1.30% 40.80%
1956 11.80% 30.20%
1957 0.50% 32.80%
1958 16.10% 0.00%
1959 2.50% 5.00%
1960 5.70% 8.20%
1961 6.20% 15.70%
1962 11.40% 4.70%
1963 0.50% 3.50%
1964 0.70% 26.30%
1965 10.50% 13.50%
1966 11.30% 6.90%
1967 0.20% 5.30%
1968 3.80% 0.70%
1969 17.50% 0.70%
1970 7.80% 0.30%
1971 5.10% 1.00%
1972 9.70% 0.40%
1973 21.60% 0.00%
1974 30.70% 0.00%
1975 15.10% 0.40%
1976 17.10% 4.30%
1977 5.70% 26.70%
1978 13.30% 1.60%
1979 20.50% 0.50%
1980 13.10% 1.00%
1981 0.60% 23.20%
1982 6.20% 1.90%
1983 29.70% 0.00%
1984 22.40% 0.00%
1985 15.10% 3.00%
1986 10.20% 0.00%
1987 14.60% 0.00%
1988 7.90% 9.70%
1989 0.70% 17.10%
1990 9.30% 25.60%
1991 6.30% 18.40%
1992 13.40% 5.40%
1993 31.30% 1.50%
1994 21.20% 0.50%
1995 16.20% 0.90%
1996 26.50% 2.00%
1997 34.30% 3.00%
1998 18.90% 0.40%
1999 12.90% 2.80%
2000 1.10% 19.90%
2001 4.80% 15.00%
2002 2.90% 20.70%
2003 2.50% 28.60%
2004 9.90% 15.30%
2005 27.00% 3.90%
2006 13.70% 10.40%
2007 9.50% 12.40%
2008 3.20% 15.20%
2009 14.20% 8.10%
2010 24.70% 0.30%
2011 16.10% 6.50%
2012 6.60% 17.30%
2013 0.90% 32.10%
2014 6.70% 11.00%
2015 5.60% 7.20%

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.