U.S. Climate Extremes Index (CEI): Graph

NCEI 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 10.70%
1911 32.30%
1912 58.40%
1913 24.90%
1914 6.10%
1915 30.60%
1916 18.50%
1917 48.60%
1918 3.20%
1919 19.40%
1920 25.70%
1921 41.60%
1922 20.20%
1923 6.90%
1924 42.20%
1925 30.70%
1926 30.30%
1927 10.50%
1928 4.20%
1929 27.10%
1930 8.70%
1931 30.00%
1932 16.20%
1933 32.50%
1934 64.30%
1935 1.90%
1936 5.10%
1937 21.60%
1938 8.10%
1939 8.90%
1940 44.00%
1941 18.70%
1942 6.70%
1943 7.20%
1944 19.70%
1945 4.00%
1946 22.50%
1947 17.40%
1948 6.70%
1949 30.80%
1950 24.20%
1951 10.20%
1952 21.30%
1953 20.30%
1954 34.30%
1955 24.00%
1956 4.20%
1957 4.90%
1958 43.80%
1959 5.10%
1960 28.40%
1961 10.60%
1962 3.20%
1963 3.60%
1964 12.20%
1965 13.00%
1966 9.00%
1967 4.20%
1968 10.00%
1969 11.60%
1970 5.00%
1971 5.00%
1972 10.70%
1973 19.00%
1974 8.00%
1975 24.90%
1976 6.80%
1977 4.70%
1978 44.20%
1979 57.20%
1980 2.50%
1981 19.90%
1982 18.20%
1983 24.20%
1984 10.50%
1985 1.90%
1986 25.90%
1987 29.40%
1988 15.50%
1989 7.40%
1990 17.50%
1991 17.80%
1992 23.20%
1993 28.50%
1994 16.70%
1995 2.30%
1996 21.10%
1997 5.70%
1998 25.10%
1999 14.60%
2000 45.50%
2001 2.50%
2002 24.80%
2003 24.10%
2004 8.60%
2005 4.50%
2006 65.20%
2007 24.70%
2008 5.90%
2009 8.20%
2010 11.80%
2011 24.70%
2012 82.90%
2013 10.10%
2014 39.00%
2015 34.40%

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.