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 11.40%
1911 26.10%
1912 11.30%
1913 9.10%
1914 14.60%
1915 21.40%
1916 34.90%
1917 20.00%
1918 20.80%
1919 7.70%
1920 22.90%
1921 6.40%
1922 5.90%
1923 4.50%
1924 19.10%
1925 16.60%
1926 11.10%
1927 18.50%
1928 16.10%
1929 28.70%
1930 8.60%
1931 37.60%
1932 14.50%
1933 4.70%
1934 37.40%
1935 28.90%
1936 12.80%
1937 22.40%
1938 8.50%
1939 11.30%
1940 24.10%
1941 32.60%
1942 38.80%
1943 13.30%
1944 7.60%
1945 8.60%
1946 10.70%
1947 13.40%
1948 15.30%
1949 8.70%
1950 15.30%
1951 20.00%
1952 22.80%
1953 14.20%
1954 32.10%
1955 37.00%
1956 37.00%
1957 12.00%
1958 24.30%
1959 7.60%
1960 14.90%
1961 17.20%
1962 6.00%
1963 11.40%
1964 22.90%
1965 20.50%
1966 14.70%
1967 5.60%
1968 7.30%
1969 13.50%
1970 2.40%
1971 8.20%
1972 13.20%
1973 41.20%
1974 25.30%
1975 24.30%
1976 16.50%
1977 32.10%
1978 11.00%
1979 26.30%
1980 18.10%
1981 22.80%
1982 12.50%
1983 43.80%
1984 31.50%
1985 22.70%
1986 11.20%
1987 16.20%
1988 18.00%
1989 17.10%
1990 30.70%
1991 16.30%
1992 23.80%
1993 31.00%
1994 20.30%
1995 16.10%
1996 39.20%
1997 32.00%
1998 20.30%
1999 21.50%
2000 25.40%
2001 23.40%
2002 31.20%
2003 24.30%
2004 20.70%
2005 25.20%
2006 25.50%
2007 24.50%
2008 20.30%
2009 23.80%
2010 16.40%
2011 43.80%
2012 19.10%
2013 29.70%
2014 26.50%
2015 13.00%

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.