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 6.40%
1911 20.30%
1912 56.70%
1913 30.50%
1914 6.60%
1915 25.50%
1916 18.30%
1917 33.60%
1918 2.40%
1919 14.90%
1920 4.80%
1921 49.10%
1922 28.90%
1923 7.50%
1924 20.40%
1925 16.40%
1926 12.40%
1927 7.50%
1928 2.60%
1929 28.40%
1930 4.20%
1931 19.20%
1932 19.10%
1933 15.20%
1934 41.50%
1935 16.50%
1936 26.50%
1937 49.40%
1938 29.00%
1939 15.00%
1940 40.20%
1941 18.50%
1942 7.60%
1943 2.50%
1944 3.70%
1945 8.00%
1946 33.60%
1947 10.90%
1948 14.80%
1949 59.20%
1950 30.80%
1951 2.80%
1952 22.00%
1953 33.00%
1954 10.10%
1955 13.50%
1956 3.10%
1957 5.50%
1958 41.20%
1959 1.20%
1960 43.10%
1961 7.20%
1962 11.40%
1963 4.90%
1964 8.80%
1965 6.60%
1966 7.10%
1967 10.60%
1968 13.40%
1969 28.90%
1970 18.20%
1971 3.20%
1972 18.70%
1973 22.40%
1974 13.90%
1975 3.50%
1976 25.40%
1977 2.00%
1978 58.70%
1979 59.80%
1980 7.30%
1981 27.90%
1982 10.10%
1983 11.80%
1984 6.90%
1985 9.00%
1986 42.10%
1987 16.00%
1988 6.10%
1989 4.00%
1990 43.70%
1991 2.50%
1992 38.00%
1993 11.90%
1994 15.40%
1995 8.60%
1996 9.10%
1997 6.50%
1998 16.00%
1999 30.00%
2000 56.90%
2001 0.80%
2002 15.30%
2003 12.80%
2004 3.60%
2005 8.90%
2006 36.70%
2007 5.50%
2008 2.00%
2009 17.70%
2010 31.70%
2011 2.70%
2012 72.10%
2013 4.20%
2014 40.90%
2015 51.20%
2016 46.00%

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.