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% 9.40%
1911 1.70% 24.40%
1912 10.70% 0.60%
1913 8.10% 1.00%
1914 8.20% 6.40%
1915 14.00% 7.40%
1916 33.90% 0.90%
1917 15.00% 5.00%
1918 0.00% 20.80%
1919 6.10% 1.70%
1920 21.90% 1.10%
1921 5.20% 1.20%
1922 3.60% 2.30%
1923 1.30% 3.20%
1924 12.60% 6.50%
1925 0.40% 16.20%
1926 2.60% 8.50%
1927 15.50% 3.00%
1928 15.60% 0.50%
1929 20.30% 8.40%
1930 1.70% 6.90%
1931 4.80% 32.90%
1932 5.00% 9.50%
1933 1.70% 3.00%
1934 0.00% 37.40%
1935 0.30% 28.60%
1936 2.30% 10.50%
1937 2.40% 20.00%
1938 2.20% 6.30%
1939 1.70% 9.50%
1940 0.70% 23.40%
1941 18.00% 14.60%
1942 29.50% 9.30%
1943 12.10% 1.20%
1944 1.80% 5.70%
1945 6.40% 2.20%
1946 10.40% 0.30%
1947 10.50% 2.90%
1948 12.50% 2.80%
1949 6.70% 2.00%
1950 11.50% 3.80%
1951 11.40% 8.60%
1952 14.10% 8.70%
1953 2.20% 12.10%
1954 2.00% 30.00%
1955 1.70% 35.30%
1956 5.90% 31.10%
1957 0.60% 11.40%
1958 23.30% 1.00%
1959 3.30% 4.30%
1960 8.20% 6.70%
1961 5.00% 12.20%
1962 3.40% 2.60%
1963 0.00% 11.40%
1964 2.90% 20.00%
1965 8.70% 11.80%
1966 6.40% 8.20%
1967 0.70% 4.90%
1968 4.80% 2.60%
1969 11.70% 1.90%
1970 2.20% 0.20%
1971 6.10% 2.10%
1972 10.80% 2.40%
1973 40.50% 0.70%
1974 24.50% 0.90%
1975 24.00% 0.30%
1976 14.00% 2.50%
1977 3.00% 29.10%
1978 10.70% 0.30%
1979 26.30% 0.00%
1980 16.10% 2.00%
1981 1.50% 21.30%
1982 11.90% 0.60%
1983 43.80% 0.00%
1984 30.80% 0.70%
1985 17.00% 5.80%
1986 7.30% 3.90%
1987 15.40% 0.80%
1988 3.20% 14.80%
1989 2.00% 15.10%
1990 10.20% 20.50%
1991 6.80% 9.50%
1992 15.70% 8.10%
1993 31.00% 0.00%
1994 17.60% 2.70%
1995 14.80% 1.30%
1996 29.70% 9.50%
1997 28.70% 3.40%
1998 20.10% 0.20%
1999 13.20% 8.30%
2000 1.40% 24.00%
2001 6.20% 17.20%
2002 3.00% 28.20%
2003 4.70% 19.60%
2004 9.40% 11.30%
2005 20.20% 5.00%
2006 7.50% 18.00%
2007 5.20% 19.40%
2008 8.90% 11.30%
2009 16.40% 7.30%
2010 15.40% 1.00%
2011 32.00% 11.80%
2012 0.20% 18.90%
2013 1.70% 28.00%
2014 9.50% 17.00%
2015 3.50% 9.50%

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.