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 21.82%
1911 23.98%
1912 31.05%
1913 17.40%
1914 16.05%
1915 26.05%
1916 33.57%
1917 27.60%
1918 11.55%
1919 21.85%
1920 17.83%
1921 25.77%
1922 15.18%
1923 17.25%
1924 27.72%
1925 12.97%
1926 22.68%
1927 17.13%
1928 14.90%
1929 25.03%
1930 11.87%
1931 24.28%
1932 17.18%
1933 29.20%
1934 35.57%
1935 15.57%
1936 19.03%
1937 11.97%
1938 18.10%
1939 17.60%
1940 21.42%
1941 31.63%
1942 13.42%
1943 10.82%
1944 15.03%
1945 14.27%
1946 13.73%
1947 17.15%
1948 19.93%
1949 18.63%
1950 28.03%
1951 20.30%
1952 12.93%
1953 22.88%
1954 31.23%
1955 21.83%
1956 16.47%
1957 17.33%
1958 19.67%
1959 15.68%
1960 18.85%
1961 15.15%
1962 6.55%
1963 14.77%
1964 24.72%
1965 18.95%
1966 15.97%
1967 10.55%
1968 14.20%
1969 15.65%
1970 11.08%
1971 12.68%
1972 13.83%
1973 17.90%
1974 11.67%
1975 16.92%
1976 19.78%
1977 8.52%
1978 16.65%
1979 26.63%
1980 10.67%
1981 17.62%
1982 15.90%
1983 25.98%
1984 14.57%
1985 28.07%
1986 17.23%
1987 18.30%
1988 15.65%
1989 21.33%
1990 20.38%
1991 19.32%
1992 24.43%
1993 21.75%
1994 12.73%
1995 20.58%
1996 30.53%
1997 16.82%
1998 42.55%
1999 29.13%
2000 14.75%
2001 19.63%
2002 22.40%
2003 24.38%
2004 29.43%
2005 34.53%
2006 28.85%
2007 27.78%
2008 25.27%
2009 13.47%
2010 19.75%
2011 26.43%
2012 41.42%
2013 18.55%
2014 26.82%

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.