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 15.10%
1911 26.10%
1912 37.40%
1913 27.10%
1914 14.93%
1915 16.77%
1916 22.98%
1917 28.07%
1918 11.88%
1919 11.05%
1920 18.92%
1921 35.15%
1922 18.23%
1923 10.47%
1924 21.18%
1925 17.53%
1926 18.68%
1927 14.70%
1928 8.87%
1929 35.82%
1930 6.95%
1931 28.25%
1932 9.48%
1933 16.85%
1934 46.73%
1935 10.55%
1936 28.20%
1937 20.53%
1938 14.10%
1939 15.68%
1940 25.77%
1941 19.62%
1942 15.47%
1943 10.12%
1944 11.78%
1945 21.68%
1946 22.00%
1947 11.62%
1948 9.57%
1949 19.15%
1950 18.80%
1951 12.82%
1952 22.12%
1953 25.13%
1954 18.30%
1955 17.15%
1956 19.42%
1957 30.72%
1958 20.83%
1959 16.43%
1960 23.57%
1961 12.20%
1962 5.78%
1963 9.40%
1964 16.12%
1965 19.88%
1966 27.15%
1967 9.32%
1968 24.12%
1969 9.85%
1970 8.42%
1971 10.27%
1972 29.48%
1973 21.17%
1974 23.08%
1975 16.00%
1976 18.05%
1977 11.32%
1978 23.97%
1979 27.48%
1980 11.13%
1981 16.23%
1982 12.85%
1983 23.93%
1984 14.85%
1985 11.68%
1986 33.23%
1987 20.70%
1988 15.07%
1989 17.85%
1990 21.72%
1991 20.35%
1992 23.95%
1993 25.37%
1994 11.92%
1995 22.68%
1996 27.47%
1997 15.25%
1998 26.43%
1999 17.12%
2000 28.67%
2001 19.35%
2002 17.85%
2003 22.33%
2004 14.67%
2005 23.05%
2006 38.35%
2007 27.07%
2008 14.83%
2009 11.45%
2010 16.02%
2011 24.92%
2012 46.62%
2013 24.93%
2014 24.42%
2015 24.20%

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.