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
1910 21.64%
1911 29.82%
1912 32.28%
1913 17.98%
1914 11.06%
1915 27.26%
1916 50.10%
1917 35.70%
1918 9.12%
1919 16.44%
1920 15.04%
1921 18.76%
1922 17.18%
1923 20.62%
1924 31.48%
1925 13.52%
1926 11.52%
1927 32.46%
1928 18.48%
1929 29.34%
1930 9.94%
1931 41.66%
1932 7.54%
1933 17.52%
1934 60.56%
1935 12.64%
1936 22.52%
1937 25.44%
1938 13.52%
1939 28.32%
1940 18.12%
1941 20.54%
1942 16.20%
1943 7.76%
1944 17.72%
1945 8.72%
1946 14.48%
1947 11.70%
1948 12.60%
1949 8.42%
1950 32.34%
1951 43.90%
1952 13.38%
1953 19.58%
1954 20.44%
1955 22.78%
1956 10.28%
1957 10.16%
1958 8.02%
1959 3.40%
1960 11.36%
1961 14.76%
1962 3.72%
1963 7.86%
1964 15.20%
1965 14.22%
1966 8.70%
1967 7.32%
1968 14.00%
1969 8.60%
1970 8.44%
1971 12.02%
1972 13.14%
1973 15.66%
1974 5.48%
1975 16.36%
1976 15.98%
1977 10.06%
1978 30.12%
1979 14.48%
1980 10.70%
1981 31.68%
1982 23.86%
1983 16.92%
1984 16.84%
1985 21.46%
1986 18.48%
1987 38.30%
1988 34.80%
1989 15.84%
1990 17.88%
1991 13.96%
1992 13.72%
1993 40.10%
1994 18.18%
1995 20.58%
1996 33.18%
1997 14.98%
1998 38.40%
1999 37.38%
2000 12.48%
2001 32.04%
2002 12.64%
2003 15.90%
2004 15.70%
2005 28.08%
2006 36.24%
2007 41.18%
2008 17.56%
2009 16.54%
2010 29.70%
2011 23.16%
2012 48.02%
2013 21.20%
2014 18.40%

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.