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 17.42%
1911 40.66%
1912 16.88%
1913 12.86%
1914 15.40%
1915 16.06%
1916 35.14%
1917 21.56%
1918 6.72%
1919 20.12%
1920 15.94%
1921 4.46%
1922 31.58%
1923 20.22%
1924 35.58%
1925 4.60%
1926 33.12%
1927 11.90%
1928 9.38%
1929 27.08%
1930 13.08%
1931 10.50%
1932 12.16%
1933 17.26%
1934 30.86%
1935 3.30%
1936 21.68%
1937 8.22%
1938 23.88%
1939 24.08%
1940 23.40%
1941 46.58%
1942 9.22%
1943 6.50%
1944 12.88%
1945 8.24%
1946 14.42%
1947 9.90%
1948 28.76%
1949 14.90%
1950 19.24%
1951 11.08%
1952 21.90%
1953 11.68%
1954 22.98%
1955 27.16%
1956 11.98%
1957 17.70%
1958 25.12%
1959 59.96%
1960 11.76%
1961 7.32%
1962 25.60%
1963 8.44%
1964 4.06%
1965 15.04%
1966 16.70%
1967 1.08%
1968 0.00%
1969 19.78%
1970 11.94%
1971 16.52%
1972 3.74%
1973 13.30%
1974 14.42%
1975 14.90%
1976 16.88%
1977 13.40%
1978 16.44%
1979 7.20%
1980 13.74%
1981 24.24%
1982 44.66%
1983 65.36%
1984 16.94%
1985 4.92%
1986 24.28%
1987 9.02%
1988 9.18%
1989 7.56%
1990 21.82%
1991 7.30%
1992 28.80%
1993 6.72%
1994 0.00%
1995 40.52%
1996 60.12%
1997 36.08%
1998 51.56%
1999 2.22%
2000 8.40%
2001 21.80%
2002 23.50%
2003 27.94%
2004 27.08%
2005 40.38%
2006 18.58%
2007 34.00%
2008 24.22%
2009 5.08%
2010 20.50%
2011 6.94%
2012 43.56%
2013 43.26%
2014 63.10%

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.