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 10.10% 4.30%
1911 1.30% 22.70%
1912 4.70% 3.10%
1913 10.60% 1.00%
1914 10.30% 5.10%
1915 14.50% 5.00%
1916 34.20% 0.10%
1917 14.50% 3.90%
1918 0.80% 18.00%
1919 2.90% 1.00%
1920 21.70% 3.80%
1921 10.10% 1.40%
1922 3.20% 3.60%
1923 0.90% 4.50%
1924 13.00% 2.60%
1925 1.00% 10.90%
1926 1.50% 6.00%
1927 10.10% 3.60%
1928 18.70% 3.20%
1929 17.70% 8.20%
1930 3.10% 8.20%
1931 4.30% 30.30%
1932 11.40% 13.40%
1933 3.00% 4.40%
1934 0.10% 28.40%
1935 0.60% 39.10%
1936 5.10% 5.00%
1937 6.50% 22.90%
1938 2.30% 10.00%
1939 3.10% 5.60%
1940 0.00% 30.30%
1941 9.90% 11.20%
1942 30.10% 10.70%
1943 11.30% 2.80%
1944 0.20% 6.80%
1945 4.10% 5.80%
1946 13.40% 0.30%
1947 9.90% 2.20%
1948 11.50% 5.40%
1949 11.40% 2.30%
1950 7.90% 4.70%
1951 13.40% 11.90%
1952 18.40% 10.70%
1953 1.00% 14.30%
1954 2.90% 29.40%
1955 1.50% 36.40%
1956 10.20% 26.90%
1957 0.80% 33.80%
1958 17.10% 0.00%
1959 3.60% 3.20%
1960 9.60% 6.40%
1961 5.90% 15.60%
1962 10.10% 4.70%
1963 0.60% 7.40%
1964 1.50% 28.40%
1965 9.20% 14.50%
1966 12.90% 6.20%
1967 0.00% 5.60%
1968 2.00% 1.00%
1969 14.50% 1.40%
1970 5.30% 0.50%
1971 8.10% 0.90%
1972 12.90% 0.40%
1973 25.80% 0.00%
1974 28.70% 0.00%
1975 19.30% 0.60%
1976 15.40% 2.30%
1977 3.20% 28.10%
1978 7.60% 0.00%
1979 22.10% 0.00%
1980 11.40% 1.70%
1981 1.50% 21.80%
1982 9.50% 1.60%
1983 30.00% 0.70%
1984 23.70% 0.00%
1985 15.20% 3.50%
1986 12.10% 0.60%
1987 18.00% 0.00%
1988 5.60% 11.60%
1989 1.30% 17.90%
1990 9.80% 24.80%
1991 5.60% 20.50%
1992 14.00% 6.90%
1993 33.80% 1.60%
1994 22.30% 0.10%
1995 9.80% 3.00%
1996 27.40% 3.20%
1997 29.00% 3.20%
1998 27.40% 0.40%
1999 13.90% 4.70%
2000 0.90% 23.10%
2001 6.20% 14.40%
2002 2.80% 26.10%
2003 4.00% 27.40%
2004 9.30% 9.20%
2005 27.90% 6.10%
2006 10.00% 13.20%
2007 7.40% 11.20%
2008 4.80% 13.60%
2009 15.50% 7.70%
2010 22.10% 0.00%
2011 16.70% 8.30%
2012 2.80% 17.70%
2013 1.90% 28.30%
2014 8.20% 10.10%
2015 6.30% 7.20%

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.