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 15.52%
1911 12.06%
1912 35.64%
1913 8.54%
1914 18.38%
1915 9.76%
1916 11.86%
1917 40.20%
1918 11.26%
1919 7.98%
1920 12.04%
1921 41.18%
1922 14.94%
1923 6.38%
1924 34.80%
1925 9.36%
1926 17.32%
1927 25.84%
1928 11.26%
1929 29.46%
1930 18.04%
1931 50.46%
1932 5.58%
1933 22.00%
1934 27.48%
1935 7.64%
1936 19.40%
1937 11.96%
1938 31.48%
1939 18.54%
1940 30.36%
1941 25.22%
1942 9.40%
1943 9.08%
1944 11.34%
1945 13.94%
1946 22.58%
1947 4.38%
1948 4.12%
1949 12.48%
1950 40.14%
1951 25.40%
1952 6.68%
1953 41.70%
1954 36.92%
1955 12.30%
1956 14.18%
1957 8.64%
1958 34.32%
1959 5.20%
1960 15.46%
1961 9.12%
1962 5.92%
1963 34.14%
1964 18.84%
1965 8.18%
1966 17.80%
1967 3.82%
1968 8.82%
1969 15.10%
1970 8.70%
1971 6.74%
1972 18.16%
1973 38.82%
1974 19.32%
1975 14.86%
1976 30.32%
1977 8.72%
1978 34.24%
1979 46.86%
1980 10.34%
1981 10.28%
1982 15.60%
1983 10.84%
1984 8.00%
1985 19.96%
1986 14.78%
1987 18.64%
1988 24.44%
1989 24.40%
1990 37.52%
1991 24.34%
1992 8.58%
1993 34.48%
1994 15.12%
1995 8.50%
1996 34.56%
1997 14.38%
1998 45.30%
1999 29.08%
2000 15.74%
2001 12.16%
2002 24.12%
2003 21.18%
2004 24.64%
2005 15.06%
2006 31.02%
2007 28.28%
2008 30.36%
2009 24.96%
2010 20.42%
2011 32.74%
2012 50.98%
2013 20.32%
2014 37.40%

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.