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 18.68%
1911 29.96%
1912 34.20%
1913 19.20%
1914 19.02%
1915 21.96%
1916 23.24%
1917 31.20%
1918 15.80%
1919 17.06%
1920 22.80%
1921 26.46%
1922 19.74%
1923 13.04%
1924 28.74%
1925 21.76%
1926 22.92%
1927 18.50%
1928 11.00%
1929 28.64%
1930 10.78%
1931 25.96%
1932 11.66%
1933 18.32%
1934 41.12%
1935 11.64%
1936 18.42%
1937 21.52%
1938 14.86%
1939 10.78%
1940 30.82%
1941 23.08%
1942 16.26%
1943 13.54%
1944 14.54%
1945 10.98%
1946 14.02%
1947 13.84%
1948 13.96%
1949 23.72%
1950 22.22%
1951 16.16%
1952 15.62%
1953 18.24%
1954 25.40%
1955 21.88%
1956 13.72%
1957 15.20%
1958 24.92%
1959 8.28%
1960 17.92%
1961 15.18%
1962 7.82%
1963 11.78%
1964 18.36%
1965 14.66%
1966 12.86%
1967 8.40%
1968 11.56%
1969 11.80%
1970 11.82%
1971 12.92%
1972 14.34%
1973 25.00%
1974 16.26%
1975 19.24%
1976 11.32%
1977 12.90%
1978 28.08%
1979 32.62%
1980 10.72%
1981 18.56%
1982 16.16%
1983 27.08%
1984 18.84%
1985 14.10%
1986 24.16%
1987 21.74%
1988 19.92%
1989 13.22%
1990 22.58%
1991 23.48%
1992 25.28%
1993 24.74%
1994 14.20%
1995 15.84%
1996 24.80%
1997 18.12%
1998 33.22%
1999 23.48%
2000 29.98%
2001 12.84%
2002 22.82%
2003 20.78%
2004 14.58%
2005 17.00%
2006 38.68%
2007 25.02%
2008 17.72%
2009 14.64%
2010 21.96%
2011 32.64%
2012 46.12%
2013 21.00%
2014 30.40%
2015 29.82%

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.