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 6.80%
1911 21.30%
1912 56.70%
1913 30.80%
1914 6.60%
1915 25.50%
1916 18.50%
1917 33.60%
1918 2.40%
1919 15.20%
1920 4.80%
1921 50.00%
1922 28.90%
1923 7.50%
1924 20.40%
1925 16.80%
1926 13.00%
1927 7.50%
1928 3.10%
1929 28.40%
1930 4.20%
1931 19.30%
1932 19.50%
1933 16.00%
1934 42.20%
1935 16.80%
1936 26.50%
1937 49.40%
1938 29.90%
1939 15.00%
1940 40.20%
1941 18.30%
1942 7.90%
1943 3.10%
1944 3.70%
1945 8.30%
1946 34.20%
1947 10.80%
1948 14.80%
1949 59.50%
1950 31.00%
1951 2.80%
1952 22.00%
1953 36.30%
1954 11.80%
1955 13.50%
1956 3.10%
1957 5.50%
1958 41.60%
1959 1.20%
1960 43.10%
1961 7.90%
1962 11.40%
1963 4.90%
1964 8.90%
1965 6.60%
1966 7.20%
1967 12.20%
1968 14.70%
1969 28.90%
1970 18.70%
1971 3.20%
1972 18.90%
1973 23.10%
1974 13.90%
1975 3.50%
1976 25.60%
1977 2.00%
1978 58.90%
1979 60.20%
1980 7.50%
1981 29.30%
1982 10.10%
1983 14.00%
1984 7.40%
1985 9.00%
1986 43.70%
1987 17.10%
1988 6.30%
1989 4.20%
1990 44.40%
1991 2.80%
1992 38.90%
1993 11.90%
1994 16.20%
1995 9.60%
1996 9.30%
1997 7.20%
1998 16.60%
1999 31.80%
2000 58.80%
2001 0.80%
2002 16.10%
2003 14.40%
2004 4.20%
2005 9.40%
2006 37.50%
2007 6.60%
2008 2.00%
2009 18.60%
2010 32.00%
2011 2.90%
2012 74.20%
2013 4.30%
2014 39.60%
2015 51.10%

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.