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
1911 26.40%
1912 34.36%
1913 26.08%
1914 15.86%
1915 20.70%
1916 21.02%
1917 32.76%
1918 31.70%
1919 17.58%
1920 29.66%
1921 23.70%
1922 18.32%
1923 12.36%
1924 15.52%
1925 18.24%
1926 17.58%
1927 13.86%
1928 13.64%
1929 19.08%
1930 14.58%
1931 25.58%
1932 31.12%
1933 14.80%
1934 33.88%
1935 25.36%
1936 21.78%
1937 25.38%
1938 14.06%
1939 13.60%
1940 22.16%
1941 15.88%
1942 22.40%
1943 12.20%
1944 9.22%
1945 8.74%
1946 9.78%
1947 8.90%
1948 13.86%
1949 29.14%
1950 20.72%
1951 19.58%
1952 20.40%
1953 13.26%
1954 24.70%
1955 15.76%
1956 19.66%
1957 14.38%
1958 22.58%
1959 11.60%
1960 20.58%
1961 12.40%
1962 11.60%
1963 12.30%
1964 17.74%
1965 13.96%
1966 12.26%
1967 12.96%
1968 9.12%
1969 15.88%
1970 16.98%
1971 9.42%
1972 11.86%
1973 28.40%
1974 24.32%
1975 9.88%
1976 17.26%
1977 34.90%
1978 31.60%
1979 27.48%
1980 11.86%
1981 27.92%
1982 13.10%
1983 29.20%
1984 20.78%
1985 21.08%
1986 14.06%
1987 18.48%
1988 11.40%
1989 9.48%
1990 15.24%
1991 17.84%
1992 23.88%
1993 20.40%
1994 12.06%
1995 22.02%
1996 29.92%
1997 21.52%
1998 25.54%
1999 35.98%
2000 37.52%
2001 16.68%
2002 26.78%
2003 19.54%
2004 16.90%
2005 27.88%
2006 28.18%
2007 18.02%
2008 19.12%
2009 18.68%
2010 24.16%
2011 17.94%
2012 37.86%
2013 16.10%
2014 24.84%
2015 26.30%

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.