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 13.86%
1911 33.96%
1912 30.20%
1913 36.50%
1914 9.96%
1915 4.12%
1916 48.18%
1917 13.62%
1918 6.86%
1919 35.64%
1920 17.60%
1921 10.30%
1922 37.26%
1923 15.42%
1924 22.88%
1925 19.36%
1926 25.20%
1927 12.14%
1928 10.04%
1929 51.56%
1930 28.78%
1931 17.68%
1932 12.10%
1933 19.86%
1934 55.20%
1935 32.00%
1936 20.72%
1937 19.96%
1938 5.40%
1939 25.44%
1940 32.52%
1941 23.26%
1942 12.20%
1943 12.54%
1944 14.24%
1945 7.88%
1946 5.86%
1947 8.46%
1948 53.44%
1949 23.88%
1950 23.70%
1951 13.66%
1952 15.48%
1953 16.60%
1954 13.36%
1955 37.68%
1956 12.40%
1957 6.42%
1958 34.00%
1959 13.32%
1960 0.90%
1961 6.08%
1962 4.60%
1963 5.20%
1964 29.68%
1965 16.68%
1966 13.46%
1967 12.62%
1968 6.48%
1969 2.56%
1970 11.34%
1971 19.82%
1972 6.76%
1973 3.52%
1974 11.30%
1975 27.24%
1976 8.84%
1977 10.22%
1978 4.06%
1979 4.84%
1980 18.28%
1981 21.54%
1982 34.40%
1983 40.46%
1984 40.84%
1985 33.74%
1986 6.90%
1987 37.46%
1988 14.80%
1989 4.10%
1990 21.60%
1991 6.66%
1992 47.20%
1993 15.62%
1994 21.72%
1995 37.48%
1996 48.20%
1997 35.92%
1998 49.94%
1999 11.08%
2000 5.64%
2001 19.90%
2002 16.82%
2003 41.78%
2004 24.58%
2005 13.10%
2006 24.66%
2007 18.10%
2008 4.72%
2009 8.90%
2010 24.62%
2011 12.84%
2012 28.62%
2013 8.28%
2014 36.54%

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.