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

NCDC 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 51.04%
1911 24.32%
1912 31.32%
1913 12.10%
1914 11.08%
1915 21.88%
1916 21.62%
1917 46.58%
1918 9.86%
1919 11.46%
1920 33.56%
1921 8.46%
1922 13.54%
1923 14.96%
1924 26.76%
1925 16.88%
1926 15.92%
1927 18.76%
1928 21.00%
1929 17.40%
1930 8.10%
1931 7.96%
1932 6.74%
1933 6.44%
1934 55.44%
1935 31.92%
1936 14.18%
1937 17.92%
1938 13.76%
1939 18.28%
1940 15.72%
1941 17.84%
1942 14.10%
1943 15.26%
1944 13.52%
1945 10.66%
1946 26.16%
1947 13.36%
1948 11.18%
1949 7.78%
1950 30.66%
1951 29.86%
1952 14.84%
1953 7.74%
1954 14.26%
1955 32.36%
1956 12.58%
1957 13.02%
1958 10.66%
1959 7.28%
1960 13.90%
1961 16.36%
1962 9.68%
1963 3.80%
1964 13.34%
1965 33.64%
1966 9.32%
1967 13.48%
1968 2.78%
1969 10.58%
1970 18.70%
1971 7.96%
1972 12.60%
1973 16.14%
1974 8.76%
1975 32.52%
1976 8.52%
1977 29.14%
1978 8.34%
1979 12.04%
1980 18.02%
1981 32.90%
1982 9.72%
1983 19.42%
1984 14.02%
1985 30.80%
1986 23.48%
1987 40.36%
1988 24.28%
1989 17.38%
1990 13.06%
1991 20.02%
1992 33.82%
1993 12.00%
1994 32.42%
1995 27.86%
1996 36.20%
1997 13.46%
1998 9.78%
1999 19.00%
2000 22.28%
2001 21.48%
2002 31.56%
2003 8.70%
2004 33.36%
2005 13.16%
2006 11.78%
2007 40.08%
2008 15.54%
2009 11.54%
2010 24.60%
2011 40.70%
2012 38.48%
2013 32.18%
2014 12.08%
2015 15.92%

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.