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 16.44%
1911 25.48%
1912 30.82%
1913 18.62%
1914 12.26%
1915 14.00%
1916 24.82%
1917 19.80%
1918 16.72%
1919 11.16%
1920 21.00%
1921 19.08%
1922 19.46%
1923 9.92%
1924 12.02%
1925 12.38%
1926 10.36%
1927 15.64%
1928 11.04%
1929 32.18%
1930 9.38%
1931 26.96%
1932 28.14%
1933 19.96%
1934 22.36%
1935 15.02%
1936 28.62%
1937 40.72%
1938 10.70%
1939 10.94%
1940 27.54%
1941 15.62%
1942 15.92%
1943 14.38%
1944 10.76%
1945 7.52%
1946 10.50%
1947 7.04%
1948 16.18%
1949 39.06%
1950 27.76%
1951 10.00%
1952 19.78%
1953 21.64%
1954 28.40%
1955 16.08%
1956 12.34%
1957 19.90%
1958 20.68%
1959 6.90%
1960 14.02%
1961 16.42%
1962 9.44%
1963 22.74%
1964 18.54%
1965 8.52%
1966 18.72%
1967 9.68%
1968 12.04%
1969 16.00%
1970 13.08%
1971 8.82%
1972 11.44%
1973 12.68%
1974 15.30%
1975 10.74%
1976 14.14%
1977 23.98%
1978 33.98%
1979 40.66%
1980 12.50%
1981 21.94%
1982 13.70%
1983 25.18%
1984 13.84%
1985 21.00%
1986 20.24%
1987 18.26%
1988 8.48%
1989 11.92%
1990 31.34%
1991 13.54%
1992 26.34%
1993 20.50%
1994 15.46%
1995 16.44%
1996 16.78%
1997 13.58%
1998 32.88%
1999 28.92%
2000 28.84%
2001 9.78%
2002 22.94%
2003 19.06%
2004 8.84%
2005 24.94%
2006 30.04%
2007 10.46%
2008 10.12%
2009 14.30%
2010 23.04%
2011 12.50%
2012 25.42%
2013 15.80%
2014 22.26%
2015 24.80%

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.