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 Warm Cold
1910 99.00% 0.00%
1911 21.00% 0.00%
1912 0.00% 47.90%
1913 0.00% 4.00%
1914 1.00% 0.00%
1915 3.90% 24.70%
1916 0.00% 5.00%
1917 0.00% 80.60%
1918 6.50% 0.00%
1919 2.10% 2.00%
1920 0.00% 73.00%
1921 8.80% 0.00%
1922 0.00% 22.70%
1923 0.00% 7.40%
1924 0.90% 34.50%
1925 23.00% 0.00%
1926 16.10% 0.00%
1927 0.00% 11.20%
1928 0.00% 0.00%
1929 0.00% 6.40%
1930 2.00% 0.00%
1931 0.00% 0.00%
1932 0.00% 3.10%
1933 0.00% 4.30%
1934 99.00% 0.00%
1935 0.00% 31.10%
1936 5.10% 0.00%
1937 0.00% 0.00%
1938 0.00% 0.00%
1939 25.80% 0.00%
1940 17.50% 0.00%
1941 9.80% 0.00%
1942 0.00% 0.00%
1943 0.00% 1.00%
1944 0.00% 19.50%
1945 0.00% 1.10%
1946 43.30% 0.00%
1947 2.90% 13.90%
1948 0.00% 3.90%
1949 5.10% 0.00%
1950 0.00% 56.90%
1951 0.00% 28.90%
1952 0.00% 3.30%
1953 0.00% 5.20%
1954 0.00% 8.80%
1955 18.20% 26.10%
1956 0.00% 3.00%
1957 0.00% 19.40%
1958 1.90% 9.90%
1959 0.00% 0.00%
1960 0.00% 16.00%
1961 0.00% 2.20%
1962 0.00% 0.00%
1963 1.10% 0.00%
1964 0.00% 13.30%
1965 0.00% 46.60%
1966 1.00% 0.00%
1967 0.00% 15.60%
1968 0.00% 0.00%
1969 0.00% 0.00%
1970 0.00% 36.50%
1971 0.00% 1.00%
1972 2.20% 0.00%
1973 0.00% 7.50%
1974 2.10% 1.90%
1975 0.00% 68.90%
1976 0.00% 0.00%
1977 39.80% 0.00%
1978 0.00% 0.00%
1979 0.00% 14.80%
1980 19.80% 1.10%
1981 42.90% 0.00%
1982 0.00% 5.00%
1983 0.00% 30.30%
1984 0.00% 16.10%
1985 58.10% 0.00%
1986 18.70% 0.00%
1987 57.80% 0.00%
1988 44.60% 0.00%
1989 5.40% 0.00%
1990 0.00% 0.00%
1991 1.00% 0.00%
1992 68.80% 0.00%
1993 0.00% 3.30%
1994 54.70% 0.00%
1995 0.00% 34.00%
1996 0.00% 36.60%
1997 0.00% 3.00%
1998 1.00% 0.00%
1999 0.00% 0.00%
2000 43.90% 0.00%
2001 8.20% 0.00%
2002 0.00% 30.80%
2003 0.00% 0.00%
2004 39.70% 0.00%
2005 0.90% 0.00%
2006 16.00% 0.00%
2007 43.90% 0.00%
2008 0.00% 2.10%
2009 0.00% 1.00%
2010 1.00% 0.00%
2011 0.00% 29.40%
2012 88.30% 0.00%
2013 0.00% 15.20%
2014 0.00% 0.00%
2015 25.30% 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.