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 14.80%
1911 14.40%
1912 54.90%
1913 19.50%
1914 8.90%
1915 20.70%
1916 12.60%
1917 40.80%
1918 1.50%
1919 9.80%
1920 19.40%
1921 44.20%
1922 33.00%
1923 8.00%
1924 24.50%
1925 34.00%
1926 29.00%
1927 10.70%
1928 1.80%
1929 27.60%
1930 2.60%
1931 24.10%
1932 15.10%
1933 15.30%
1934 43.20%
1935 5.50%
1936 30.00%
1937 49.70%
1938 21.10%
1939 5.20%
1940 42.20%
1941 14.30%
1942 6.00%
1943 9.30%
1944 10.60%
1945 11.70%
1946 44.70%
1947 9.40%
1948 6.20%
1949 38.10%
1950 29.00%
1951 4.70%
1952 12.20%
1953 8.10%
1954 38.90%
1955 19.30%
1956 2.00%
1957 5.30%
1958 40.30%
1959 7.20%
1960 33.20%
1961 3.70%
1962 3.50%
1963 0.00%
1964 9.10%
1965 9.50%
1966 8.90%
1967 16.10%
1968 10.10%
1969 17.40%
1970 8.50%
1971 4.80%
1972 22.70%
1973 24.50%
1974 13.40%
1975 23.90%
1976 28.90%
1977 2.60%
1978 53.00%
1979 58.50%
1980 14.00%
1981 36.70%
1982 14.90%
1983 23.60%
1984 10.80%
1985 2.50%
1986 37.50%
1987 26.00%
1988 5.90%
1989 6.80%
1990 43.30%
1991 5.20%
1992 37.50%
1993 18.70%
1994 12.30%
1995 1.80%
1996 12.30%
1997 4.30%
1998 16.70%
1999 22.70%
2000 56.60%
2001 0.80%
2002 19.30%
2003 4.80%
2004 10.40%
2005 9.00%
2006 59.60%
2007 7.50%
2008 3.50%
2009 10.60%
2010 23.20%
2011 8.30%
2012 80.60%
2013 5.00%
2014 35.50%
2015 49.20%

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.