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 21.56%
1911 24.52%
1912 21.36%
1913 10.52%
1914 18.06%
1915 19.08%
1916 23.08%
1917 29.16%
1918 11.64%
1919 28.92%
1920 13.90%
1921 18.14%
1922 15.32%
1923 18.04%
1924 17.52%
1925 19.96%
1926 15.70%
1927 23.92%
1928 9.32%
1929 26.18%
1930 16.16%
1931 35.90%
1932 20.16%
1933 26.62%
1934 18.60%
1935 12.30%
1936 20.20%
1937 20.82%
1938 18.36%
1939 22.48%
1940 12.28%
1941 30.74%
1942 10.26%
1943 19.26%
1944 8.48%
1945 11.02%
1946 20.58%
1947 13.84%
1948 13.78%
1949 7.14%
1950 18.02%
1951 21.00%
1952 30.12%
1953 33.34%
1954 22.84%
1955 14.76%
1956 20.94%
1957 21.52%
1958 11.24%
1959 21.80%
1960 6.92%
1961 20.84%
1962 11.36%
1963 38.14%
1964 13.38%
1965 12.12%
1966 7.68%
1967 18.10%
1968 8.46%
1969 6.56%
1970 12.70%
1971 17.64%
1972 24.14%
1973 24.62%
1974 17.22%
1975 10.68%
1976 33.44%
1977 14.96%
1978 11.14%
1979 16.88%
1980 9.92%
1981 12.06%
1982 15.86%
1983 18.98%
1984 17.14%
1985 38.66%
1986 24.10%
1987 15.38%
1988 14.20%
1989 14.08%
1990 17.10%
1991 17.14%
1992 12.94%
1993 24.52%
1994 12.80%
1995 23.30%
1996 23.22%
1997 13.18%
1998 33.62%
1999 26.96%
2000 11.30%
2001 23.22%
2002 17.80%
2003 17.08%
2004 26.50%
2005 23.42%
2006 12.00%
2007 24.94%
2008 16.56%
2009 18.80%
2010 18.12%
2011 22.08%
2012 22.72%
2013 11.72%
2014 18.72%
2015 35.86%

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.