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 25.48%
1911 27.38%
1912 35.28%
1913 12.36%
1914 19.32%
1915 30.22%
1916 18.00%
1917 39.92%
1918 16.16%
1919 27.46%
1920 19.52%
1921 36.42%
1922 10.10%
1923 17.20%
1924 26.34%
1925 22.02%
1926 6.08%
1927 23.04%
1928 7.32%
1929 19.24%
1930 7.38%
1931 16.14%
1932 11.44%
1933 34.52%
1934 37.54%
1935 16.36%
1936 23.02%
1937 6.90%
1938 28.16%
1939 19.78%
1940 21.50%
1941 35.80%
1942 18.52%
1943 12.96%
1944 7.76%
1945 15.88%
1946 20.88%
1947 5.48%
1948 6.00%
1949 15.52%
1950 13.82%
1951 25.72%
1952 17.84%
1953 23.64%
1954 52.00%
1955 17.24%
1956 34.78%
1957 24.58%
1958 26.02%
1959 9.30%
1960 17.26%
1961 27.00%
1962 5.22%
1963 23.74%
1964 10.66%
1965 8.72%
1966 19.68%
1967 5.94%
1968 30.98%
1969 10.76%
1970 6.18%
1971 4.82%
1972 4.38%
1973 29.90%
1974 19.74%
1975 15.00%
1976 26.00%
1977 6.12%
1978 13.86%
1979 41.30%
1980 8.50%
1981 12.60%
1982 6.98%
1983 30.52%
1984 6.32%
1985 18.78%
1986 22.48%
1987 16.54%
1988 9.44%
1989 20.90%
1990 12.50%
1991 23.96%
1992 22.68%
1993 27.88%
1994 10.10%
1995 11.36%
1996 13.84%
1997 18.28%
1998 38.76%
1999 31.60%
2000 19.60%
2001 17.52%
2002 10.52%
2003 12.08%
2004 19.14%
2005 17.70%
2006 41.10%
2007 24.44%
2008 20.10%
2009 19.54%
2010 14.14%
2011 40.04%
2012 55.46%
2013 16.48%
2014 16.50%
2015 39.38%

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.