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
1910 20.64%
1911 23.50%
1912 25.34%
1913 14.40%
1914 17.66%
1915 27.52%
1916 19.02%
1917 27.22%
1918 18.24%
1919 21.12%
1920 25.42%
1921 20.52%
1922 10.54%
1923 17.24%
1924 31.86%
1925 21.80%
1926 16.70%
1927 22.18%
1928 25.38%
1929 14.74%
1930 16.24%
1931 23.60%
1932 10.36%
1933 16.66%
1934 37.66%
1935 12.22%
1936 32.70%
1937 14.22%
1938 11.44%
1939 15.00%
1940 20.02%
1941 35.24%
1942 15.56%
1943 10.48%
1944 12.12%
1945 22.06%
1946 8.80%
1947 9.06%
1948 17.54%
1949 12.12%
1950 28.74%
1951 23.74%
1952 12.40%
1953 19.00%
1954 28.76%
1955 21.80%
1956 21.84%
1957 14.26%
1958 16.54%
1959 12.06%
1960 9.84%
1961 20.74%
1962 7.10%
1963 19.38%
1964 16.36%
1965 24.64%
1966 14.12%
1967 21.00%
1968 14.76%
1969 7.72%
1970 7.76%
1971 10.04%
1972 10.14%
1973 20.96%
1974 14.88%
1975 22.56%
1976 21.16%
1977 19.34%
1978 13.86%
1979 16.88%
1980 18.20%
1981 12.20%
1982 13.72%
1983 22.28%
1984 17.16%
1985 10.04%
1986 14.98%
1987 18.54%
1988 23.24%
1989 18.66%
1990 15.00%
1991 22.94%
1992 31.64%
1993 25.86%
1994 16.00%
1995 19.58%
1996 18.30%
1997 23.78%
1998 33.14%
1999 18.66%
2000 21.12%
2001 21.96%
2002 24.74%
2003 20.90%
2004 16.44%
2005 18.82%
2006 27.26%
2007 32.58%
2008 16.50%
2009 17.98%
2010 34.22%
2011 37.80%
2012 37.46%
2013 26.16%
2014 21.44%
2015 31.82%

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.