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% 12.20%
1911 16.90% 5.10%
1912 2.50% 43.70%
1913 4.00% 14.30%
1914 0.50% 1.10%
1915 0.60% 5.50%
1916 3.80% 17.50%
1917 0.40% 22.00%
1918 0.30% 13.10%
1919 1.10% 9.60%
1920 4.30% 8.70%
1921 24.40% 0.00%
1922 0.00% 26.90%
1923 0.80% 3.00%
1924 4.40% 2.10%
1925 5.80% 0.60%
1926 5.30% 0.30%
1927 14.10% 0.00%
1928 1.50% 0.00%
1929 0.20% 49.30%
1930 6.20% 3.90%
1931 29.30% 1.10%
1932 33.00% 8.40%
1933 18.30% 16.80%
1934 33.90% 1.30%
1935 7.80% 0.70%
1936 0.30% 44.10%
1937 9.10% 50.30%
1938 3.00% 0.00%
1939 6.40% 9.30%
1940 0.30% 42.10%
1941 5.20% 0.70%
1942 0.00% 6.20%
1943 12.80% 0.00%
1944 11.60% 1.50%
1945 0.30% 0.30%
1946 8.20% 0.40%
1947 0.50% 2.40%
1948 1.30% 11.40%
1949 20.30% 49.40%
1950 28.10% 13.20%
1951 1.20% 0.70%
1952 21.60% 4.60%
1953 36.90% 0.00%
1954 54.40% 0.00%
1955 0.00% 11.30%
1956 0.10% 2.40%
1957 7.90% 4.70%
1958 7.00% 18.70%
1959 0.00% 0.60%
1960 0.30% 19.60%
1961 10.60% 0.40%
1962 0.00% 3.40%
1963 4.60% 18.50%
1964 8.60% 6.20%
1965 0.00% 0.30%
1966 0.10% 23.90%
1967 6.50% 0.00%
1968 2.30% 16.00%
1969 0.00% 15.70%
1970 7.10% 3.20%
1971 1.30% 0.70%
1972 4.30% 1.90%
1973 0.20% 12.70%
1974 7.10% 2.60%
1975 1.00% 0.80%
1976 18.30% 0.00%
1977 2.80% 27.30%
1978 0.00% 58.60%
1979 0.00% 80.80%
1980 0.20% 0.10%
1981 33.30% 0.00%
1982 0.20% 10.50%
1983 16.20% 1.60%
1984 4.80% 3.90%
1985 0.40% 29.10%
1986 27.90% 0.00%
1987 16.70% 0.40%
1988 4.10% 1.70%
1989 1.30% 5.70%
1990 49.70% 0.00%
1991 12.00% 0.00%
1992 34.60% 0.60%
1993 0.00% 17.40%
1994 1.30% 14.40%
1995 15.30% 0.00%
1996 9.10% 0.00%
1997 0.40% 0.60%
1998 22.70% 0.70%
1999 42.30% 0.00%
2000 42.00% 0.00%
2001 0.00% 0.50%
2002 31.20% 0.20%
2003 18.30% 7.70%
2004 0.00% 1.00%
2005 6.20% 1.20%
2006 56.80% 0.00%
2007 0.20% 1.90%
2008 1.10% 1.00%
2009 17.50% 0.00%
2010 6.10% 32.20%
2011 0.00% 0.00%
2012 42.30% 0.00%
2013 2.50% 1.70%
2014 17.50% 12.30%
2015 29.60% 14.20%

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.