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 22.12%
1911 29.02%
1912 31.54%
1913 18.14%
1914 10.82%
1915 27.78%
1916 49.40%
1917 34.62%
1918 9.50%
1919 16.20%
1920 14.60%
1921 18.14%
1922 17.18%
1923 21.32%
1924 31.64%
1925 12.68%
1926 11.24%
1927 31.84%
1928 18.68%
1929 30.28%
1930 10.10%
1931 41.10%
1932 6.78%
1933 18.46%
1934 60.58%
1935 12.66%
1936 22.18%
1937 25.04%
1938 12.76%
1939 26.02%
1940 17.52%
1941 20.16%
1942 15.96%
1943 7.44%
1944 17.94%
1945 8.82%
1946 13.28%
1947 11.00%
1948 11.02%
1949 8.50%
1950 32.04%
1951 44.02%
1952 13.58%
1953 19.20%
1954 19.58%
1955 22.04%
1956 10.42%
1957 10.32%
1958 7.70%
1959 3.02%
1960 11.50%
1961 14.18%
1962 3.80%
1963 7.48%
1964 15.40%
1965 14.76%
1966 9.18%
1967 7.24%
1968 14.72%
1969 8.68%
1970 7.82%
1971 11.76%
1972 13.26%
1973 14.28%
1974 5.54%
1975 16.22%
1976 15.76%
1977 10.18%
1978 31.00%
1979 14.58%
1980 10.06%
1981 30.66%
1982 24.06%
1983 15.76%
1984 16.78%
1985 21.56%
1986 18.00%
1987 37.56%
1988 34.42%
1989 15.58%
1990 17.62%
1991 13.26%
1992 12.42%
1993 40.84%
1994 17.62%
1995 20.42%
1996 32.14%
1997 14.18%
1998 37.34%
1999 36.58%
2000 11.76%
2001 31.00%
2002 12.34%
2003 14.90%
2004 16.02%
2005 26.68%
2006 36.62%
2007 39.14%
2008 17.56%
2009 16.18%
2010 29.06%
2011 22.68%
2012 47.22%
2013 20.20%
2014 17.22%
2015 41.84%

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.