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 6.90%
1911 25.10%
1912 51.60%
1913 17.30%
1914 6.00%
1915 23.10%
1916 19.00%
1917 55.70%
1918 0.70%
1919 11.30%
1920 24.20%
1921 42.50%
1922 31.40%
1923 8.00%
1924 45.10%
1925 30.30%
1926 29.80%
1927 17.90%
1928 3.40%
1929 31.60%
1930 3.50%
1931 27.50%
1932 13.90%
1933 29.20%
1934 53.60%
1935 3.60%
1936 18.80%
1937 37.20%
1938 20.10%
1939 6.90%
1940 44.20%
1941 14.50%
1942 7.70%
1943 7.00%
1944 10.00%
1945 5.70%
1946 32.30%
1947 19.60%
1948 6.10%
1949 34.30%
1950 32.00%
1951 2.70%
1952 5.60%
1953 8.70%
1954 19.40%
1955 23.40%
1956 2.50%
1957 7.50%
1958 42.30%
1959 1.20%
1960 34.50%
1961 3.60%
1962 1.10%
1963 1.90%
1964 10.60%
1965 6.40%
1966 15.60%
1967 12.30%
1968 9.10%
1969 8.30%
1970 4.00%
1971 6.30%
1972 17.90%
1973 17.90%
1974 17.30%
1975 24.90%
1976 14.40%
1977 5.10%
1978 51.00%
1979 58.10%
1980 12.30%
1981 25.40%
1982 8.20%
1983 28.10%
1984 13.10%
1985 1.10%
1986 35.40%
1987 35.40%
1988 4.70%
1989 8.10%
1990 31.10%
1991 16.50%
1992 38.90%
1993 17.50%
1994 16.30%
1995 1.20%
1996 19.20%
1997 8.10%
1998 22.70%
1999 18.10%
2000 68.60%
2001 2.30%
2002 15.60%
2003 7.60%
2004 10.80%
2005 6.60%
2006 63.40%
2007 13.70%
2008 4.90%
2009 14.30%
2010 15.30%
2011 13.40%
2012 82.40%
2013 5.10%
2014 32.70%
2015 33.60%

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.