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 33.70%
1911 17.92%
1912 38.80%
1913 16.26%
1914 15.88%
1915 6.48%
1916 28.88%
1917 45.84%
1918 10.06%
1919 7.56%
1920 8.76%
1921 35.42%
1922 9.06%
1923 16.56%
1924 36.60%
1925 7.86%
1926 23.44%
1927 9.82%
1928 8.80%
1929 30.56%
1930 12.42%
1931 58.44%
1932 7.68%
1933 19.68%
1934 35.76%
1935 9.66%
1936 20.38%
1937 14.00%
1938 19.42%
1939 17.34%
1940 11.86%
1941 20.30%
1942 5.44%
1943 8.36%
1944 6.68%
1945 8.96%
1946 10.54%
1947 3.00%
1948 11.02%
1949 13.52%
1950 45.46%
1951 53.76%
1952 14.42%
1953 17.14%
1954 9.24%
1955 8.58%
1956 13.08%
1957 9.76%
1958 13.38%
1959 11.26%
1960 16.80%
1961 11.28%
1962 4.80%
1963 15.66%
1964 14.78%
1965 16.14%
1966 16.28%
1967 8.44%
1968 12.72%
1969 6.02%
1970 4.74%
1971 8.94%
1972 35.50%
1973 24.90%
1974 4.64%
1975 7.18%
1976 25.02%
1977 14.90%
1978 24.26%
1979 34.08%
1980 13.56%
1981 17.50%
1982 17.88%
1983 19.50%
1984 16.34%
1985 21.30%
1986 21.90%
1987 44.36%
1988 20.82%
1989 20.10%
1990 22.04%
1991 18.60%
1992 6.18%
1993 38.40%
1994 14.10%
1995 8.98%
1996 35.86%
1997 8.46%
1998 51.44%
1999 45.00%
2000 12.72%
2001 27.88%
2002 17.38%
2003 4.80%
2004 12.22%
2005 26.86%
2006 43.26%
2007 23.62%
2008 28.44%
2009 21.78%
2010 51.84%
2011 12.98%
2012 51.80%
2013 16.22%
2014 45.14%
2015 31.94%

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.