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 12.30%
1911 27.36%
1912 34.06%
1913 7.42%
1914 15.94%
1915 21.08%
1916 9.82%
1917 27.32%
1918 6.40%
1919 12.30%
1920 22.96%
1921 34.94%
1922 22.70%
1923 5.74%
1924 21.48%
1925 27.64%
1926 16.44%
1927 33.64%
1928 19.46%
1929 31.16%
1930 14.62%
1931 21.92%
1932 24.12%
1933 28.74%
1934 8.12%
1935 5.60%
1936 16.60%
1937 10.14%
1938 14.60%
1939 11.84%
1940 36.46%
1941 18.80%
1942 6.30%
1943 22.62%
1944 9.72%
1945 7.08%
1946 15.98%
1947 17.44%
1948 20.72%
1949 24.16%
1950 8.16%
1951 11.84%
1952 7.36%
1953 19.68%
1954 34.26%
1955 18.74%
1956 11.56%
1957 13.94%
1958 38.88%
1959 16.20%
1960 25.56%
1961 14.96%
1962 9.78%
1963 27.54%
1964 31.02%
1965 12.40%
1966 30.74%
1967 15.92%
1968 26.94%
1969 32.92%
1970 7.36%
1971 13.74%
1972 15.94%
1973 14.34%
1974 10.70%
1975 28.24%
1976 36.72%
1977 6.62%
1978 15.44%
1979 33.76%
1980 4.76%
1981 27.80%
1982 12.12%
1983 27.96%
1984 11.76%
1985 12.60%
1986 20.54%
1987 3.42%
1988 19.86%
1989 22.18%
1990 45.96%
1991 33.64%
1992 20.20%
1993 3.90%
1994 14.78%
1995 15.56%
1996 17.42%
1997 11.52%
1998 44.98%
1999 26.92%
2000 18.24%
2001 15.54%
2002 23.94%
2003 22.30%
2004 19.32%
2005 7.34%
2006 26.38%
2007 49.04%
2008 14.20%
2009 16.44%
2010 17.68%
2011 33.42%
2012 38.04%
2013 35.00%
2014 19.76%
2015 34.44%

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.