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 12.20%
1911 22.00%
1912 46.20%
1913 18.30%
1914 1.60%
1915 6.10%
1916 21.40%
1917 22.40%
1918 13.30%
1919 10.70%
1920 13.00%
1921 24.40%
1922 26.90%
1923 3.80%
1924 6.50%
1925 6.40%
1926 5.60%
1927 14.10%
1928 1.50%
1929 49.50%
1930 10.10%
1931 30.40%
1932 41.40%
1933 35.00%
1934 35.20%
1935 8.50%
1936 44.30%
1937 59.40%
1938 3.00%
1939 15.70%
1940 42.40%
1941 5.80%
1942 6.20%
1943 12.80%
1944 13.10%
1945 0.60%
1946 8.50%
1947 2.90%
1948 12.70%
1949 69.70%
1950 41.30%
1951 1.90%
1952 26.20%
1953 36.90%
1954 54.40%
1955 11.30%
1956 2.60%
1957 12.50%
1958 25.70%
1959 0.60%
1960 19.90%
1961 11.00%
1962 3.40%
1963 23.00%
1964 14.80%
1965 0.30%
1966 24.10%
1967 6.50%
1968 18.30%
1969 15.70%
1970 10.30%
1971 2.00%
1972 6.20%
1973 12.90%
1974 9.70%
1975 1.80%
1976 18.30%
1977 30.10%
1978 58.60%
1979 80.80%
1980 0.40%
1981 33.30%
1982 10.70%
1983 17.80%
1984 8.70%
1985 29.50%
1986 27.90%
1987 17.10%
1988 5.90%
1989 7.00%
1990 49.70%
1991 12.00%
1992 35.20%
1993 17.40%
1994 15.70%
1995 15.30%
1996 9.10%
1997 1.00%
1998 23.40%
1999 42.30%
2000 42.00%
2001 0.50%
2002 31.40%
2003 26.00%
2004 1.00%
2005 7.40%
2006 56.80%
2007 2.20%
2008 2.00%
2009 17.50%
2010 38.30%
2011 0.00%
2012 42.30%
2013 4.20%
2014 29.80%
2015 43.80%

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.