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 0.00% 6.90%
1911 1.70% 1.60%
1912 15.00% 0.00%
1913 1.60% 0.00%
1914 0.00% 11.40%
1915 0.00% 27.80%
1916 0.00% 6.90%
1917 0.00% 16.00%
1918 36.90% 0.00%
1919 0.00% 0.00%
1920 0.00% 18.80%
1921 52.70% 0.00%
1922 48.20% 0.00%
1923 0.00% 3.10%
1924 0.00% 42.70%
1925 0.00% 1.60%
1926 0.00% 86.70%
1927 32.40% 0.00%
1928 0.00% 9.50%
1929 70.00% 0.00%
1930 0.00% 0.00%
1931 0.00% 73.20%
1932 0.00% 17.30%
1933 1.70% 0.00%
1934 0.00% 4.60%
1935 55.40% 0.00%
1936 1.70% 0.00%
1937 0.00% 7.90%
1938 46.80% 0.00%
1939 0.00% 0.00%
1940 0.00% 56.60%
1941 0.00% 30.70%
1942 0.00% 3.40%
1943 0.00% 1.60%
1944 0.00% 0.00%
1945 58.30% 0.00%
1946 44.90% 0.00%
1947 0.00% 23.60%
1948 58.70% 0.00%
1949 0.00% 0.00%
1950 0.00% 8.00%
1951 0.00% 1.70%
1952 0.00% 1.60%
1953 21.90% 0.00%
1954 0.00% 0.00%
1955 44.60% 0.00%
1956 0.00% 1.50%
1957 6.40% 0.00%
1958 0.00% 0.00%
1959 0.00% 0.00%
1960 0.00% 91.60%
1961 0.00% 14.50%
1962 0.00% 0.00%
1963 6.50% 0.00%
1964 0.00% 0.00%
1965 1.60% 0.00%
1966 0.00% 1.60%
1967 3.30% 1.60%
1968 0.00% 8.20%
1969 0.00% 48.50%
1970 0.00% 0.00%
1971 0.00% 100.00%
1972 0.00% 1.50%
1973 4.60% 0.00%
1974 3.10% 0.00%
1975 0.00% 0.00%
1976 0.00% 3.10%
1977 25.10% 0.00%
1978 0.00% 0.00%
1979 0.00% 0.00%
1980 0.00% 4.70%
1981 0.00% 8.10%
1982 0.00% 0.00%
1983 0.00% 37.70%
1984 0.00% 8.00%
1985 4.90% 0.00%
1986 0.00% 10.10%
1987 0.00% 0.00%
1988 0.00% 25.70%
1989 1.70% 0.00%
1990 3.30% 0.00%
1991 95.20% 0.00%
1992 0.00% 22.90%
1993 0.00% 42.60%
1994 1.70% 1.60%
1995 20.00% 1.50%
1996 0.00% 9.70%
1997 10.20% 9.40%
1998 12.50% 0.00%
1999 0.00% 0.00%
2000 4.60% 0.00%
2001 0.00% 0.00%
2002 13.40% 1.50%
2003 50.70% 0.00%
2004 37.60% 0.00%
2005 0.00% 26.00%
2006 3.20% 0.00%
2007 0.00% 1.70%
2008 0.00% 0.00%
2009 3.10% 0.00%
2010 20.20% 0.00%
2011 14.10% 0.00%
2012 100.00% 0.00%
2013 0.00% 32.80%
2014 0.00% 4.80%
2015 55.80% 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.