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 6.70% 0.20%
1911 19.40% 5.80%
1912 0.00% 51.60%
1913 4.20% 13.10%
1914 3.70% 2.30%
1915 0.90% 22.20%
1916 4.40% 14.60%
1917 0.00% 55.70%
1918 0.30% 0.30%
1919 0.90% 10.40%
1920 0.50% 23.70%
1921 41.40% 1.20%
1922 0.50% 30.90%
1923 0.00% 8.00%
1924 5.40% 39.60%
1925 30.10% 0.20%
1926 18.50% 11.20%
1927 16.50% 1.40%
1928 2.80% 0.60%
1929 0.50% 31.10%
1930 3.00% 0.60%
1931 21.80% 5.70%
1932 8.30% 5.50%
1933 7.40% 21.80%
1934 53.30% 0.30%
1935 1.40% 2.20%
1936 1.80% 17.00%
1937 0.80% 36.40%
1938 18.40% 1.70%
1939 6.80% 0.10%
1940 4.50% 39.70%
1941 7.10% 7.30%
1942 0.50% 7.20%
1943 5.10% 1.90%
1944 1.10% 8.90%
1945 5.00% 0.60%
1946 32.30% 0.00%
1947 8.10% 11.50%
1948 0.20% 5.90%
1949 13.40% 20.80%
1950 12.00% 20.00%
1951 0.10% 2.60%
1952 1.30% 4.30%
1953 8.70% 0.00%
1954 18.90% 0.40%
1955 2.70% 20.70%
1956 0.00% 2.50%
1957 0.80% 6.60%
1958 5.80% 36.50%
1959 0.60% 0.50%
1960 0.00% 34.50%
1961 1.50% 2.20%
1962 0.00% 1.10%
1963 0.50% 1.40%
1964 2.50% 8.10%
1965 0.00% 6.40%
1966 1.60% 13.90%
1967 9.00% 3.30%
1968 0.30% 8.80%
1969 0.00% 8.30%
1970 0.50% 3.50%
1971 1.10% 5.20%
1972 17.10% 0.80%
1973 0.30% 17.60%
1974 16.50% 0.70%
1975 0.80% 24.00%
1976 14.40% 0.00%
1977 4.40% 0.60%
1978 0.20% 50.80%
1979 0.00% 58.10%
1980 0.20% 12.20%
1981 25.10% 0.30%
1982 0.00% 8.20%
1983 4.10% 23.90%
1984 3.20% 9.90%
1985 0.00% 1.10%
1986 35.40% 0.00%
1987 33.70% 1.70%
1988 4.30% 0.40%
1989 7.50% 0.60%
1990 31.10% 0.00%
1991 16.30% 0.20%
1992 38.50% 0.40%
1993 0.00% 17.50%
1994 12.80% 3.40%
1995 0.90% 0.30%
1996 12.80% 6.40%
1997 6.20% 1.90%
1998 17.80% 4.90%
1999 17.60% 0.50%
2000 68.60% 0.00%
2001 2.30% 0.00%
2002 15.60% 0.00%
2003 4.70% 2.80%
2004 10.80% 0.00%
2005 5.60% 1.00%
2006 62.90% 0.50%
2007 12.80% 0.90%
2008 2.20% 2.70%
2009 14.20% 0.20%
2010 9.50% 5.80%
2011 7.00% 6.50%
2012 82.40% 0.00%
2013 4.00% 1.10%
2014 18.60% 14.10%
2015 28.20% 5.40%

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.