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 15.57%
1911 24.97%
1912 34.93%
1913 21.37%
1914 15.85%
1915 18.30%
1916 36.03%
1917 26.00%
1918 13.17%
1919 18.18%
1920 19.00%
1921 30.25%
1922 16.45%
1923 10.87%
1924 23.95%
1925 18.13%
1926 26.13%
1927 15.42%
1928 9.17%
1929 30.08%
1930 8.98%
1931 26.25%
1932 9.72%
1933 24.70%
1934 45.85%
1935 9.70%
1936 29.30%
1937 21.90%
1938 12.38%
1939 12.05%
1940 25.68%
1941 19.23%
1942 13.55%
1943 19.48%
1944 12.12%
1945 15.37%
1946 16.88%
1947 11.53%
1948 15.60%
1949 19.77%
1950 18.52%
1951 13.47%
1952 17.92%
1953 18.55%
1954 25.13%
1955 18.23%
1956 15.40%
1957 27.73%
1958 20.77%
1959 17.88%
1960 22.30%
1961 12.65%
1962 6.52%
1963 9.82%
1964 15.30%
1965 16.18%
1966 18.92%
1967 7.00%
1968 17.77%
1969 9.83%
1970 13.82%
1971 10.77%
1972 21.85%
1973 20.83%
1974 17.52%
1975 16.03%
1976 13.40%
1977 10.75%
1978 27.07%
1979 34.40%
1980 8.93%
1981 19.50%
1982 13.47%
1983 22.57%
1984 15.70%
1985 18.35%
1986 26.57%
1987 18.12%
1988 16.60%
1989 14.37%
1990 18.82%
1991 19.57%
1992 21.07%
1993 23.68%
1994 16.28%
1995 18.08%
1996 29.95%
1997 24.23%
1998 27.68%
1999 19.57%
2000 24.98%
2001 14.37%
2002 19.02%
2003 26.27%
2004 12.15%
2005 30.83%
2006 35.58%
2007 24.52%
2008 22.43%
2009 12.20%
2010 21.37%
2011 30.87%
2012 42.43%
2013 21.95%
2014 33.00%
2015 30.82%

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.