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
1911 26.30%
1912 34.40%
1913 25.80%
1914 15.52%
1915 20.58%
1916 20.68%
1917 32.62%
1918 31.50%
1919 16.98%
1920 29.10%
1921 22.46%
1922 18.50%
1923 12.40%
1924 15.32%
1925 18.38%
1926 17.28%
1927 13.12%
1928 13.42%
1929 19.14%
1930 14.24%
1931 25.24%
1932 31.16%
1933 14.42%
1934 33.80%
1935 24.96%
1936 22.06%
1937 25.16%
1938 13.66%
1939 13.04%
1940 21.72%
1941 15.66%
1942 21.32%
1943 11.74%
1944 9.04%
1945 8.10%
1946 8.96%
1947 8.84%
1948 14.22%
1949 28.50%
1950 19.16%
1951 18.42%
1952 20.30%
1953 12.90%
1954 23.82%
1955 15.14%
1956 19.74%
1957 14.08%
1958 21.94%
1959 11.18%
1960 20.92%
1961 12.20%
1962 11.32%
1963 12.28%
1964 17.26%
1965 14.32%
1966 12.26%
1967 12.60%
1968 8.88%
1969 15.86%
1970 16.96%
1971 9.50%
1972 11.22%
1973 28.24%
1974 23.74%
1975 10.00%
1976 17.02%
1977 34.54%
1978 31.66%
1979 27.50%
1980 11.48%
1981 27.32%
1982 12.62%
1983 28.72%
1984 20.98%
1985 20.64%
1986 14.18%
1987 17.50%
1988 11.08%
1989 9.40%
1990 14.50%
1991 17.30%
1992 23.22%
1993 20.30%
1994 12.06%
1995 20.72%
1996 29.86%
1997 21.30%
1998 24.70%
1999 34.62%
2000 36.80%
2001 16.80%
2002 25.92%
2003 19.00%
2004 16.36%
2005 26.70%
2006 27.28%
2007 17.22%
2008 18.68%
2009 18.12%
2010 23.44%
2011 18.12%
2012 37.50%
2013 15.24%
2014 24.60%
2015 26.50%
2016 47.70%

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.