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 Wet Dry
1911 0.00% 22.00%
1912 5.80% 3.10%
1913 9.70% 1.10%
1914 12.20% 4.80%
1915 12.30% 5.80%
1916 31.20% 0.00%
1917 16.10% 4.30%
1918 0.90% 18.40%
1919 2.90% 0.90%
1920 22.10% 3.10%
1921 8.40% 1.20%
1922 3.70% 4.30%
1923 1.00% 4.70%
1924 13.90% 2.60%
1925 1.20% 9.90%
1926 1.40% 5.80%
1927 10.60% 3.10%
1928 20.10% 3.00%
1929 16.30% 8.60%
1930 3.80% 8.60%
1931 3.60% 28.50%
1932 9.20% 15.00%
1933 3.80% 1.90%
1934 1.20% 28.10%
1935 0.70% 39.50%
1936 2.80% 8.90%
1937 4.00% 25.40%
1938 2.80% 10.90%
1939 5.70% 7.50%
1940 0.00% 32.80%
1941 8.00% 10.40%
1942 33.00% 10.50%
1943 11.70% 2.00%
1944 0.50% 4.60%
1945 4.40% 6.30%
1946 12.70% 0.00%
1947 10.60% 2.20%
1948 12.00% 5.30%
1949 9.70% 3.00%
1950 6.00% 3.00%
1951 12.20% 11.70%
1952 17.70% 10.60%
1953 0.90% 13.90%
1954 2.10% 31.50%
1955 1.50% 40.80%
1956 9.50% 27.30%
1957 0.90% 32.70%
1958 18.30% 0.00%
1959 3.00% 3.20%
1960 8.10% 6.80%
1961 6.40% 11.50%
1962 9.10% 4.50%
1963 0.20% 6.70%
1964 0.50% 27.80%
1965 11.60% 13.70%
1966 13.60% 7.10%
1967 0.00% 5.90%
1968 2.40% 1.60%
1969 12.90% 0.90%
1970 6.40% 0.30%
1971 8.60% 0.90%
1972 11.00% 0.40%
1973 24.80% 0.00%
1974 28.30% 0.00%
1975 16.50% 1.20%
1976 16.20% 0.40%
1977 4.50% 27.90%
1978 8.40% 2.00%
1979 17.80% 0.00%
1980 13.20% 1.70%
1981 0.70% 19.90%
1982 8.20% 2.50%
1983 30.30% 0.40%
1984 28.10% 0.00%
1985 17.40% 2.60%
1986 13.80% 0.20%
1987 18.60% 0.00%
1988 5.30% 12.40%
1989 0.30% 17.50%
1990 9.40% 24.60%
1991 6.80% 19.80%
1992 14.10% 5.80%
1993 30.20% 1.50%
1994 21.10% 0.10%
1995 8.10% 0.00%
1996 24.90% 2.50%
1997 31.90% 3.70%
1998 22.70% 0.40%
1999 13.70% 6.30%
2000 1.10% 20.60%
2001 3.60% 14.40%
2002 4.50% 23.70%
2003 4.80% 27.70%
2004 10.60% 10.90%
2005 26.10% 5.70%
2006 12.10% 11.90%
2007 8.00% 11.60%
2008 4.50% 15.50%
2009 16.80% 7.60%
2010 22.50% 0.30%
2011 17.80% 8.50%
2012 3.90% 17.90%
2013 1.10% 30.00%
2014 8.10% 9.50%
2015 3.40% 8.10%
2016 24.50% 3.10%

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.