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 18.12%
1911 31.32%
1912 32.82%
1913 19.72%
1914 17.92%
1915 20.12%
1916 27.58%
1917 33.68%
1918 14.26%
1919 13.26%
1920 22.70%
1921 24.98%
1922 21.88%
1923 12.56%
1924 25.42%
1925 21.04%
1926 22.42%
1927 17.64%
1928 10.64%
1929 28.86%
1930 8.34%
1931 24.66%
1932 11.38%
1933 20.22%
1934 38.40%
1935 12.66%
1936 20.22%
1937 24.64%
1938 16.92%
1939 9.58%
1940 30.92%
1941 23.54%
1942 18.56%
1943 12.14%
1944 14.14%
1945 11.90%
1946 15.76%
1947 13.94%
1948 11.48%
1949 22.98%
1950 22.56%
1951 15.38%
1952 14.44%
1953 20.46%
1954 21.96%
1955 20.58%
1956 12.66%
1957 16.86%
1958 25.00%
1959 9.08%
1960 17.64%
1961 14.64%
1962 6.94%
1963 11.28%
1964 19.34%
1965 13.22%
1966 15.38%
1967 11.18%
1968 11.86%
1969 11.82%
1970 10.10%
1971 12.32%
1972 15.56%
1973 25.40%
1974 17.06%
1975 19.20%
1976 11.02%
1977 13.58%
1978 28.76%
1979 32.98%
1980 13.36%
1981 19.48%
1982 15.42%
1983 28.72%
1984 17.82%
1985 14.02%
1986 25.40%
1987 24.84%
1988 18.08%
1989 11.72%
1990 26.06%
1991 24.42%
1992 28.74%
1993 21.20%
1994 14.30%
1995 15.16%
1996 23.72%
1997 18.30%
1998 31.72%
1999 20.54%
2000 34.40%
2001 13.02%
2002 21.42%
2003 16.04%
2004 17.60%
2005 17.46%
2006 36.32%
2007 22.28%
2008 17.80%
2009 13.74%
2010 19.22%
2011 29.90%
2012 45.24%
2013 18.54%
2014 29.30%
2015 29.04%

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.