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 Warm Cold
1910 0.40% 5.90%
1911 19.60% 1.40%
1912 1.70% 38.70%
1913 20.90% 8.40%
1914 22.20% 0.00%
1915 0.20% 3.60%
1916 17.00% 30.20%
1917 0.20% 15.80%
1918 2.10% 50.30%
1919 14.70% 7.20%
1920 5.30% 10.60%
1921 11.30% 0.70%
1922 0.20% 16.80%
1923 28.80% 1.00%
1924 0.80% 4.00%
1925 0.50% 3.60%
1926 1.30% 3.60%
1927 5.00% 0.20%
1928 3.10% 0.00%
1929 0.00% 24.40%
1930 0.20% 47.50%
1931 21.00% 0.20%
1932 26.90% 13.80%
1933 46.20% 7.20%
1934 29.90% 0.00%
1935 9.00% 0.40%
1936 1.30% 13.40%
1937 20.40% 52.80%
1938 1.40% 0.00%
1939 14.70% 0.00%
1940 0.30% 50.80%
1941 1.50% 0.40%
1942 2.80% 3.10%
1943 2.80% 2.20%
1944 17.20% 1.30%
1945 1.40% 4.70%
1946 2.00% 2.20%
1947 6.20% 2.80%
1948 9.60% 15.50%
1949 17.10% 48.10%
1950 32.90% 19.00%
1951 0.30% 0.50%
1952 21.20% 5.80%
1953 45.30% 0.00%
1954 4.40% 0.90%
1955 0.00% 8.00%
1956 7.50% 0.30%
1957 0.00% 14.30%
1958 8.40% 4.00%
1959 3.10% 0.20%
1960 0.00% 6.10%
1961 11.30% 3.60%
1962 0.00% 4.30%
1963 0.20% 26.20%
1964 11.10% 0.00%
1965 2.90% 0.50%
1966 0.50% 19.50%
1967 8.90% 0.00%
1968 0.00% 2.00%
1969 4.10% 14.00%
1970 0.90% 24.50%
1971 2.50% 0.70%
1972 1.40% 2.90%
1973 0.50% 10.90%
1974 9.70% 2.50%
1975 0.50% 0.20%
1976 3.50% 0.30%
1977 0.00% 49.10%
1978 1.00% 47.60%
1979 0.00% 75.40%
1980 0.20% 0.50%
1981 27.80% 5.20%
1982 0.00% 23.10%
1983 9.30% 2.40%
1984 1.10% 8.80%
1985 0.60% 26.20%
1986 41.80% 0.00%
1987 6.20% 0.20%
1988 0.00% 9.00%
1989 34.00% 1.40%
1990 51.60% 0.00%
1991 1.40% 2.10%
1992 16.40% 2.90%
1993 0.20% 7.70%
1994 19.20% 23.70%
1995 2.90% 0.30%
1996 4.40% 0.00%
1997 0.00% 0.40%
1998 12.50% 0.00%
1999 22.70% 0.00%
2000 14.30% 0.00%
2001 3.50% 1.30%
2002 20.30% 0.00%
2003 31.50% 4.20%
2004 0.00% 4.70%
2005 5.20% 1.50%
2006 75.50% 0.00%
2007 2.60% 6.60%
2008 0.40% 1.90%
2009 11.70% 1.20%
2010 6.20% 4.10%
2011 1.40% 0.80%
2012 52.90% 0.00%
2013 2.70% 4.60%
2014 20.70% 6.30%
2015 16.80% 0.20%

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.