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

NCEI added Alaska climate divisions to its nClimDiv dataset on Friday, March 6, 2015, coincident with the release of the February 2015 monthly monitoring report. For more information on this data, please visit the Alaska Climate Divisions FAQ.

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 Percent
1910 22.40%
1911 28.10%
1912 7.20%
1913 10.50%
1914 19.10%
1915 16.80%
1916 40.30%
1917 18.00%
1918 18.40%
1919 2.30%
1920 25.50%
1921 13.10%
1922 8.00%
1923 5.60%
1924 15.50%
1925 12.40%
1926 6.50%
1927 14.00%
1928 21.90%
1929 19.90%
1930 14.30%
1931 32.60%
1932 17.20%
1933 5.80%
1934 26.70%
1935 38.20%
1936 11.60%
1937 30.30%
1938 14.20%
1939 12.70%
1940 40.90%
1941 14.00%
1942 39.80%
1943 16.90%
1944 9.90%
1945 12.80%
1946 11.60%
1947 14.40%
1948 15.90%
1949 10.70%
1950 9.50%
1951 21.10%
1952 33.40%
1953 15.70%
1954 28.60%
1955 42.10%
1956 42.00%
1957 33.30%
1958 15.10%
1959 7.50%
1960 13.50%
1961 21.90%
1962 15.70%
1963 4.10%
1964 27.00%
1965 23.90%
1966 18.20%
1967 5.50%
1968 4.50%
1969 17.70%
1970 8.10%
1971 6.00%
1972 9.50%
1973 21.30%
1974 30.20%
1975 15.50%
1976 20.30%
1977 32.50%
1978 14.80%
1979 20.80%
1980 13.60%
1981 23.80%
1982 7.00%
1983 29.70%
1984 22.20%
1985 17.90%
1986 10.20%
1987 14.60%
1988 16.80%
1989 17.80%
1990 34.90%
1991 24.80%
1992 18.70%
1993 32.60%
1994 21.20%
1995 16.20%
1996 28.10%
1997 36.70%
1998 19.20%
1999 15.70%
2000 21.00%
2001 18.50%
2002 23.60%
2003 31.10%
2004 25.30%
2005 30.80%
2006 24.20%
2007 21.70%
2008 18.20%
2009 21.90%
2010 24.30%
2011 22.20%
2012 23.90%
2013 33.10%
2014 17.30%
2015 11.30%
2016 23.70%

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.