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
1910 0.00% 34.40%
1911 0.00% 16.30%
1912 24.20% 5.20%
1913 2.40% 11.60%
1914 0.00% 47.90%
1915 0.00% 29.70%
1916 0.00% 42.40%
1917 0.00% 11.30%
1918 2.10% 15.30%
1919 4.60% 4.50%
1920 16.60% 0.00%
1921 4.30% 24.50%
1922 21.60% 0.00%
1923 34.80% 4.30%
1924 6.50% 0.00%
1925 0.00% 59.50%
1926 2.40% 26.20%
1927 2.10% 18.10%
1928 22.70% 0.00%
1929 26.30% 0.00%
1930 6.90% 4.30%
1931 4.40% 2.20%
1932 0.00% 2.00%
1933 4.10% 4.10%
1934 17.00% 0.00%
1935 16.90% 2.20%
1936 2.20% 10.30%
1937 4.40% 4.10%
1938 8.30% 6.60%
1939 10.40% 2.00%
1940 2.00% 6.20%
1941 0.00% 51.50%
1942 0.00% 14.10%
1943 0.00% 6.10%
1944 22.50% 4.30%
1945 2.00% 24.70%
1946 21.00% 2.10%
1947 13.20% 6.10%
1948 15.30% 0.00%
1949 6.30% 0.00%
1950 6.10% 0.00%
1951 4.00% 8.20%
1952 2.10% 2.00%
1953 6.60% 4.40%
1954 0.00% 2.00%
1955 2.00% 0.00%
1956 0.00% 8.50%
1957 32.10% 4.10%
1958 36.90% 0.00%
1959 31.90% 0.00%
1960 2.20% 10.60%
1961 6.20% 2.20%
1962 0.00% 4.10%
1963 0.00% 8.10%
1964 2.10% 0.00%
1965 12.70% 2.10%
1966 8.40% 1.90%
1967 0.00% 29.40%
1968 2.00% 0.00%
1969 2.30% 10.40%
1970 4.10% 0.00%
1971 0.00% 2.10%
1972 20.60% 2.10%
1973 42.70% 0.00%
1974 4.20% 0.00%
1975 35.10% 0.00%
1976 11.40% 6.20%
1977 0.00% 8.20%
1978 2.10% 0.00%
1979 10.20% 0.00%
1980 38.80% 0.00%
1981 0.00% 15.40%
1982 8.90% 0.00%
1983 12.00% 0.00%
1984 14.20% 0.00%
1985 0.00% 20.00%
1986 0.00% 54.00%
1987 6.50% 8.30%
1988 2.00% 6.30%
1989 20.40% 0.00%
1990 8.40% 8.90%
1991 59.10% 2.00%
1992 6.30% 10.90%
1993 2.10% 2.10%
1994 0.00% 8.40%
1995 0.00% 10.20%
1996 4.10% 4.20%
1997 2.00% 4.10%
1998 15.90% 6.30%
1999 0.00% 4.40%
2000 1.90% 20.90%
2001 4.20% 0.00%
2002 2.00% 2.20%
2003 56.70% 0.00%
2004 2.00% 28.80%
2005 6.70% 0.00%
2006 0.00% 26.70%
2007 0.00% 63.30%
2008 0.00% 4.20%
2009 32.90% 0.00%
2010 4.60% 2.30%
2011 6.80% 12.30%
2012 5.10% 5.20%
2013 2.70% 8.10%
2014 8.10% 2.60%
2015 33.50% 4.00%

*As of September 2005, the fourth and fifth indicators are computed with data from one station per each grid box rather than multiple stations. This was done to eliminate many of the artificial extremes which resulted from a changing number of available stations over time. Therefore, the percentages in the step 4 and 5 graphs above will likely be significantly different from the percentages calculated prior to the changes implemented in September 2005.

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.