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 9.10%
1911 27.40%
1912 16.00%
1913 7.00%
1914 16.30%
1915 22.10%
1916 30.90%
1917 19.60%
1918 21.50%
1919 16.10%
1920 25.20%
1921 7.90%
1922 3.50%
1923 5.80%
1924 17.70%
1925 16.80%
1926 9.80%
1927 21.30%
1928 18.70%
1929 26.70%
1930 10.50%
1931 35.80%
1932 12.10%
1933 3.80%
1934 44.50%
1935 27.30%
1936 18.00%
1937 22.10%
1938 8.40%
1939 11.60%
1940 24.10%
1941 38.30%
1942 34.80%
1943 14.70%
1944 8.80%
1945 9.90%
1946 11.30%
1947 9.80%
1948 15.40%
1949 9.10%
1950 14.80%
1951 21.10%
1952 19.70%
1953 15.90%
1954 33.90%
1955 31.60%
1956 38.00%
1957 11.20%
1958 23.70%
1959 8.10%
1960 15.50%
1961 18.50%
1962 4.90%
1963 11.90%
1964 22.80%
1965 18.70%
1966 14.30%
1967 5.20%
1968 6.60%
1969 11.10%
1970 2.30%
1971 11.70%
1972 13.80%
1973 46.10%
1974 22.10%
1975 24.00%
1976 16.20%
1977 26.60%
1978 14.80%
1979 24.60%
1980 13.40%
1981 16.30%
1982 12.90%
1983 41.00%
1984 33.20%
1985 20.70%
1986 12.60%
1987 16.30%
1988 21.40%
1989 18.80%
1990 21.40%
1991 10.30%
1992 29.10%
1993 29.10%
1994 17.40%
1995 19.80%
1996 35.20%
1997 31.70%
1998 21.20%
1999 23.30%
2000 22.80%
2001 20.40%
2002 31.20%
2003 23.90%
2004 22.00%
2005 20.80%
2006 23.60%
2007 27.60%
2008 23.90%
2009 20.70%
2010 16.40%
2011 53.80%
2012 20.30%
2013 30.60%
2014 22.00%
2015 17.80%

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.