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 11.00%
1911 22.80%
1912 9.70%
1913 10.80%
1914 12.50%
1915 25.90%
1916 35.60%
1917 20.20%
1918 19.50%
1919 6.00%
1920 21.20%
1921 6.80%
1922 7.30%
1923 4.20%
1924 19.90%
1925 14.90%
1926 8.60%
1927 16.20%
1928 17.50%
1929 26.70%
1930 8.90%
1931 37.50%
1932 17.00%
1933 5.80%
1934 30.90%
1935 36.70%
1936 12.20%
1937 24.00%
1938 10.90%
1939 11.50%
1940 24.50%
1941 27.80%
1942 40.20%
1943 14.70%
1944 6.60%
1945 9.20%
1946 9.90%
1947 13.60%
1948 15.90%
1949 10.70%
1950 14.00%
1951 22.60%
1952 25.50%
1953 13.00%
1954 32.30%
1955 38.00%
1956 36.40%
1957 15.30%
1958 24.00%
1959 9.20%
1960 14.40%
1961 18.50%
1962 8.60%
1963 10.30%
1964 26.20%
1965 20.50%
1966 16.30%
1967 7.20%
1968 6.30%
1969 14.70%
1970 3.20%
1971 7.90%
1972 14.00%
1973 35.70%
1974 26.60%
1975 22.90%
1976 17.40%
1977 32.00%
1978 10.60%
1979 23.00%
1980 18.00%
1981 25.40%
1982 11.50%
1983 39.30%
1984 29.00%
1985 23.40%
1986 12.20%
1987 17.70%
1988 18.90%
1989 17.40%
1990 29.80%
1991 17.80%
1992 22.70%
1993 33.60%
1994 22.00%
1995 13.10%
1996 34.90%
1997 33.90%
1998 25.00%
1999 17.70%
2000 23.70%
2001 20.30%
2002 30.20%
2003 30.10%
2004 23.50%
2005 24.70%
2006 27.80%
2007 23.10%
2008 20.60%
2009 23.30%
2010 18.30%
2011 35.60%
2012 18.40%
2013 29.50%
2014 24.50%
2015 12.60%

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.