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 10.46%
1911 33.96%
1912 30.20%
1913 35.80%
1914 9.30%
1915 3.86%
1916 48.72%
1917 14.16%
1918 7.16%
1919 36.80%
1920 18.16%
1921 10.30%
1922 37.26%
1923 15.42%
1924 22.62%
1925 17.46%
1926 22.92%
1927 12.38%
1928 10.82%
1929 50.64%
1930 28.92%
1931 17.56%
1932 12.52%
1933 20.66%
1934 53.22%
1935 31.72%
1936 21.12%
1937 20.70%
1938 5.18%
1939 24.68%
1940 29.84%
1941 22.24%
1942 12.52%
1943 11.96%
1944 12.30%
1945 8.26%
1946 3.80%
1947 8.52%
1948 52.32%
1949 24.46%
1950 23.18%
1951 11.88%
1952 16.06%
1953 16.54%
1954 13.78%
1955 38.00%
1956 12.74%
1957 6.68%
1958 31.50%
1959 14.00%
1960 0.90%
1961 6.42%
1962 4.88%
1963 5.10%
1964 27.98%
1965 17.44%
1966 13.60%
1967 11.74%
1968 6.74%
1969 5.10%
1970 9.58%
1971 20.04%
1972 6.92%
1973 3.28%
1974 11.76%
1975 25.80%
1976 9.22%
1977 10.36%
1978 4.26%
1979 5.02%
1980 16.88%
1981 21.90%
1982 34.40%
1983 37.64%
1984 40.44%
1985 34.80%
1986 5.46%
1987 37.24%
1988 14.92%
1989 4.28%
1990 20.46%
1991 6.34%
1992 43.82%
1993 14.60%
1994 19.08%
1995 35.36%
1996 45.78%
1997 33.50%
1998 49.38%
1999 10.36%
2000 5.76%
2001 18.06%
2002 16.88%
2003 40.54%
2004 22.06%
2005 13.36%
2006 20.72%
2007 18.48%
2008 4.06%
2009 9.36%
2010 25.84%
2011 12.84%
2012 27.42%
2013 7.52%
2014 36.70%
2015 64.74%

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.