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 23.56%
1911 22.98%
1912 30.44%
1913 21.78%
1914 14.86%
1915 20.88%
1916 23.52%
1917 27.82%
1918 15.90%
1919 11.60%
1920 20.36%
1921 26.10%
1922 23.84%
1923 11.54%
1924 19.02%
1925 22.96%
1926 18.54%
1927 18.38%
1928 11.92%
1929 26.28%
1930 6.86%
1931 23.16%
1932 12.52%
1933 14.98%
1934 30.00%
1935 16.38%
1936 26.16%
1937 32.94%
1938 21.58%
1939 8.82%
1940 29.52%
1941 21.36%
1942 18.44%
1943 14.84%
1944 10.90%
1945 13.22%
1946 21.10%
1947 12.06%
1948 13.28%
1949 24.74%
1950 23.04%
1951 13.68%
1952 14.00%
1953 13.34%
1954 25.28%
1955 20.66%
1956 12.62%
1957 15.34%
1958 25.38%
1959 11.04%
1960 15.78%
1961 10.82%
1962 6.06%
1963 9.52%
1964 20.12%
1965 12.86%
1966 12.98%
1967 12.70%
1968 12.54%
1969 13.36%
1970 11.08%
1971 12.64%
1972 16.42%
1973 26.32%
1974 16.52%
1975 16.38%
1976 16.76%
1977 18.08%
1978 33.44%
1979 34.28%
1980 14.44%
1981 25.02%
1982 14.60%
1983 29.36%
1984 18.04%
1985 14.06%
1986 25.96%
1987 20.78%
1988 13.32%
1989 11.34%
1990 30.80%
1991 16.38%
1992 30.14%
1993 20.98%
1994 14.44%
1995 13.38%
1996 24.60%
1997 15.80%
1998 28.66%
1999 22.56%
2000 30.06%
2001 10.58%
2002 19.66%
2003 16.90%
2004 16.12%
2005 19.40%
2006 37.10%
2007 17.04%
2008 14.32%
2009 16.20%
2010 21.80%
2011 20.32%
2012 41.82%
2013 17.40%
2014 29.84%
2015 28.14%

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.