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 22.22%
1911 26.40%
1912 34.08%
1913 18.28%
1914 18.86%
1915 21.26%
1916 28.12%
1917 32.54%
1918 11.32%
1919 20.16%
1920 19.34%
1921 26.64%
1922 18.52%
1923 17.86%
1924 30.42%
1925 14.10%
1926 17.92%
1927 20.26%
1928 11.68%
1929 26.20%
1930 14.34%
1931 28.90%
1932 13.28%
1933 21.94%
1934 39.02%
1935 13.24%
1936 18.12%
1937 13.60%
1938 18.08%
1939 18.92%
1940 22.90%
1941 29.76%
1942 13.14%
1943 11.02%
1944 12.00%
1945 10.84%
1946 13.98%
1947 8.98%
1948 15.94%
1949 16.22%
1950 23.20%
1951 24.26%
1952 13.02%
1953 21.94%
1954 29.30%
1955 19.16%
1956 18.82%
1957 15.04%
1958 22.80%
1959 12.44%
1960 13.20%
1961 13.40%
1962 7.52%
1963 17.44%
1964 17.44%
1965 15.32%
1966 16.76%
1967 7.76%
1968 14.84%
1969 11.64%
1970 8.04%
1971 10.56%
1972 14.10%
1973 20.74%
1974 11.62%
1975 17.78%
1976 21.52%
1977 9.90%
1978 19.74%
1979 25.06%
1980 10.66%
1981 19.70%
1982 18.94%
1983 28.00%
1984 15.94%
1985 19.10%
1986 18.26%
1987 21.60%
1988 17.02%
1989 19.22%
1990 23.56%
1991 18.86%
1992 19.60%
1993 24.26%
1994 13.72%
1995 17.04%
1996 31.56%
1997 17.92%
1998 41.06%
1999 27.56%
2000 17.46%
2001 21.40%
2002 20.22%
2003 24.64%
2004 18.32%
2005 21.86%
2006 33.46%
2007 30.52%
2008 19.44%
2009 15.78%
2010 23.46%
2011 28.26%
2012 48.28%
2013 21.84%
2014 30.30%
2015 41.20%

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.