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 Wet Dry
1910 2.00% 9.00%
1911 0.60% 22.30%
1912 8.70% 1.00%
1913 9.80% 1.00%
1914 7.10% 5.50%
1915 16.00% 9.90%
1916 35.10% 0.50%
1917 14.90% 5.30%
1918 0.00% 19.50%
1919 5.80% 0.20%
1920 20.00% 1.20%
1921 5.50% 1.40%
1922 5.10% 2.30%
1923 1.00% 3.30%
1924 13.90% 6.10%
1925 0.40% 14.50%
1926 2.10% 6.50%
1927 13.40% 2.80%
1928 16.70% 0.80%
1929 18.30% 8.40%
1930 1.60% 7.20%
1931 5.30% 32.20%
1932 4.70% 12.30%
1933 1.80% 4.00%
1934 0.10% 30.80%
1935 0.60% 36.10%
1936 5.50% 6.70%
1937 3.60% 20.40%
1938 2.40% 8.40%
1939 2.80% 8.80%
1940 0.00% 24.50%
1941 15.50% 12.30%
1942 29.60% 10.60%
1943 12.70% 2.00%
1944 0.60% 6.00%
1945 6.50% 2.70%
1946 9.60% 0.30%
1947 10.80% 2.80%
1948 12.80% 3.10%
1949 8.50% 2.20%
1950 9.80% 4.20%
1951 12.60% 10.00%
1952 16.70% 8.70%
1953 1.30% 11.70%
1954 2.50% 29.90%
1955 2.00% 36.00%
1956 8.10% 28.30%
1957 0.20% 15.10%
1958 23.70% 0.30%
1959 3.70% 5.50%
1960 7.90% 6.50%
1961 4.90% 13.60%
1962 4.20% 4.40%
1963 0.00% 10.30%
1964 2.90% 23.30%
1965 8.70% 11.80%
1966 8.30% 8.00%
1967 0.00% 7.20%
1968 4.20% 2.10%
1969 13.50% 1.20%
1970 2.80% 0.40%
1971 5.80% 2.10%
1972 12.00% 1.90%
1973 35.50% 0.20%
1974 26.30% 0.30%
1975 22.50% 0.30%
1976 14.60% 2.70%
1977 3.40% 28.50%
1978 9.60% 1.00%
1979 23.00% 0.00%
1980 16.70% 1.30%
1981 1.50% 23.90%
1982 10.00% 1.50%
1983 39.30% 0.00%
1984 28.30% 0.70%
1985 18.50% 4.90%
1986 9.00% 3.10%
1987 17.40% 0.30%
1988 5.20% 13.70%
1989 2.00% 15.40%
1990 8.20% 21.60%
1991 7.10% 10.70%
1992 16.10% 6.60%
1993 33.20% 0.40%
1994 20.80% 1.20%
1995 12.70% 0.40%
1996 27.50% 7.40%
1997 29.20% 4.70%
1998 24.80% 0.20%
1999 11.20% 6.60%
2000 1.10% 22.60%
2001 5.20% 15.00%
2002 2.50% 27.70%
2003 4.20% 26.00%
2004 9.20% 14.30%
2005 19.50% 5.20%
2006 11.50% 16.30%
2007 6.30% 16.80%
2008 7.60% 13.00%
2009 16.40% 6.90%
2010 18.00% 0.30%
2011 26.10% 9.50%
2012 0.20% 18.20%
2013 1.10% 28.40%
2014 8.30% 16.20%
2015 2.80% 9.80%

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.