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 Warm Cold
1910 2.90% 8.50%
1911 45.30% 0.00%
1912 0.00% 78.60%
1913 1.90% 8.50%
1914 0.00% 3.90%
1915 1.00% 16.10%
1916 1.00% 29.20%
1917 0.00% 86.40%
1918 1.00% 9.50%
1919 1.00% 6.60%
1920 0.00% 11.50%
1921 53.00% 0.00%
1922 19.30% 0.00%
1923 6.80% 0.00%
1924 0.00% 71.90%
1925 1.00% 0.00%
1926 0.00% 2.80%
1927 39.70% 0.90%
1928 0.00% 2.90%
1929 0.00% 18.50%
1930 0.00% 1.00%
1931 28.60% 0.00%
1932 0.00% 2.90%
1933 46.00% 1.00%
1934 29.40% 0.00%
1935 8.50% 1.00%
1936 1.00% 10.80%
1937 0.00% 1.90%
1938 30.50% 0.00%
1939 4.60% 0.00%
1940 0.00% 49.00%
1941 27.60% 1.00%
1942 0.00% 11.60%
1943 0.00% 7.60%
1944 1.00% 1.90%
1945 0.00% 5.50%
1946 34.60% 0.00%
1947 0.00% 9.70%
1948 0.00% 5.60%
1949 10.60% 2.80%
1950 0.00% 20.70%
1951 0.00% 21.70%
1952 1.00% 3.90%
1953 3.70% 0.00%
1954 33.50% 0.00%
1955 0.00% 1.90%
1956 0.00% 1.90%
1957 6.70% 0.00%
1958 0.00% 7.70%
1959 0.00% 5.70%
1960 0.00% 15.20%
1961 0.00% 30.00%
1962 0.90% 0.00%
1963 1.80% 18.30%
1964 0.00% 1.00%
1965 1.00% 0.00%
1966 0.00% 30.90%
1967 0.00% 0.00%
1968 0.00% 31.70%
1969 0.00% 4.80%
1970 0.00% 7.80%
1971 0.00% 0.00%
1972 0.00% 0.00%
1973 0.00% 5.80%
1974 0.00% 1.00%
1975 0.00% 17.30%
1976 0.00% 77.30%
1977 1.80% 0.00%
1978 1.00% 25.20%
1979 0.00% 68.10%
1980 0.00% 0.00%
1981 14.90% 0.00%
1982 1.00% 2.70%
1983 0.00% 30.00%
1984 0.00% 0.90%
1985 1.00% 4.50%
1986 54.00% 0.00%
1987 8.00% 4.90%
1988 0.00% 17.20%
1989 0.00% 32.50%
1990 10.70% 0.00%
1991 17.20% 0.00%
1992 0.00% 0.00%
1993 0.00% 8.40%
1994 6.90% 0.00%
1995 0.00% 0.00%
1996 1.00% 6.50%
1997 0.00% 0.90%
1998 94.30% 0.00%
1999 33.80% 0.00%
2000 29.00% 0.00%
2001 36.40% 0.00%
2002 6.70% 0.00%
2003 10.50% 0.00%
2004 41.20% 0.00%
2005 28.80% 0.00%
2006 45.30% 0.00%
2007 27.10% 0.00%
2008 0.00% 1.90%
2009 3.90% 1.80%
2010 10.90% 0.00%
2011 9.60% 1.80%
2012 92.50% 0.00%
2013 0.00% 2.70%
2014 1.00% 16.00%
2015 65.00% 0.00%

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.