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 19.42%
1911 26.82%
1912 30.30%
1913 20.00%
1914 17.74%
1915 20.06%
1916 24.12%
1917 32.64%
1918 14.48%
1919 9.50%
1920 23.54%
1921 24.16%
1922 23.44%
1923 12.46%
1924 26.30%
1925 22.68%
1926 20.72%
1927 21.68%
1928 11.72%
1929 30.80%
1930 7.96%
1931 23.66%
1932 11.36%
1933 19.20%
1934 37.58%
1935 14.04%
1936 21.18%
1937 25.88%
1938 20.24%
1939 8.48%
1940 30.54%
1941 22.32%
1942 18.48%
1943 13.58%
1944 11.50%
1945 10.22%
1946 17.70%
1947 14.66%
1948 14.02%
1949 22.52%
1950 24.30%
1951 11.48%
1952 11.48%
1953 15.30%
1954 19.66%
1955 23.16%
1956 13.10%
1957 16.68%
1958 25.02%
1959 10.46%
1960 18.40%
1961 10.42%
1962 6.88%
1963 10.28%
1964 19.48%
1965 12.06%
1966 15.06%
1967 9.44%
1968 11.78%
1969 10.86%
1970 10.38%
1971 13.72%
1972 16.58%
1973 24.98%
1974 20.04%
1975 18.00%
1976 11.92%
1977 15.42%
1978 31.42%
1979 33.52%
1980 15.64%
1981 21.24%
1982 12.36%
1983 29.06%
1984 17.64%
1985 14.32%
1986 24.86%
1987 25.08%
1988 13.76%
1989 11.12%
1990 26.64%
1991 22.40%
1992 30.50%
1993 21.56%
1994 15.24%
1995 16.10%
1996 27.68%
1997 18.44%
1998 29.40%
1999 23.48%
2000 38.74%
2001 13.16%
2002 20.04%
2003 16.76%
2004 17.36%
2005 18.16%
2006 35.80%
2007 21.46%
2008 16.16%
2009 14.84%
2010 20.02%
2011 27.16%
2012 43.54%
2013 19.14%
2014 28.78%
2015 26.40%

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.