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 14.40%
1911 24.00%
1912 7.80%
1913 11.60%
1914 15.40%
1915 19.50%
1916 34.30%
1917 18.30%
1918 18.80%
1919 3.90%
1920 25.50%
1921 11.40%
1922 6.70%
1923 5.40%
1924 15.60%
1925 11.90%
1926 7.50%
1927 13.70%
1928 21.90%
1929 26.00%
1930 11.40%
1931 34.70%
1932 24.80%
1933 7.30%
1934 28.50%
1935 39.70%
1936 10.10%
1937 29.30%
1938 12.30%
1939 8.70%
1940 30.30%
1941 21.20%
1942 40.80%
1943 14.10%
1944 7.00%
1945 10.00%
1946 13.60%
1947 12.10%
1948 16.90%
1949 13.80%
1950 12.60%
1951 25.20%
1952 29.10%
1953 15.30%
1954 32.30%
1955 37.80%
1956 37.00%
1957 34.50%
1958 17.10%
1959 6.80%
1960 16.00%
1961 21.50%
1962 14.80%
1963 8.00%
1964 29.80%
1965 23.70%
1966 19.10%
1967 5.60%
1968 2.90%
1969 15.80%
1970 5.80%
1971 9.00%
1972 13.30%
1973 25.80%
1974 28.70%
1975 20.00%
1976 17.80%
1977 31.30%
1978 7.60%
1979 22.10%
1980 13.10%
1981 23.30%
1982 11.10%
1983 30.70%
1984 23.70%
1985 18.70%
1986 12.60%
1987 18.00%
1988 17.20%
1989 19.20%
1990 34.70%
1991 26.10%
1992 20.80%
1993 35.50%
1994 22.30%
1995 12.80%
1996 30.60%
1997 32.30%
1998 27.80%
1999 18.60%
2000 23.90%
2001 20.60%
2002 29.00%
2003 31.40%
2004 18.40%
2005 33.90%
2006 23.30%
2007 18.60%
2008 18.40%
2009 23.30%
2010 22.10%
2011 25.00%
2012 20.50%
2013 30.20%
2014 18.40%
2015 13.60%

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.