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 68.40% 0.00%
1911 2.00% 0.00%
1912 0.00% 57.90%
1913 1.10% 12.00%
1914 5.20% 0.00%
1915 23.50% 1.10%
1916 0.00% 1.10%
1917 0.00% 83.00%
1918 1.00% 2.10%
1919 0.00% 1.00%
1920 0.00% 31.00%
1921 6.50% 0.00%
1922 3.90% 9.30%
1923 0.00% 36.80%
1924 0.00% 44.70%
1925 25.90% 0.00%
1926 7.30% 0.00%
1927 0.00% 2.10%
1928 2.00% 1.10%
1929 0.00% 3.10%
1930 3.10% 0.00%
1931 0.00% 5.30%
1932 0.00% 2.10%
1933 0.00% 6.40%
1934 47.30% 0.00%
1935 1.10% 24.90%
1936 0.00% 0.00%
1937 0.00% 0.00%
1938 12.80% 0.00%
1939 5.20% 0.00%
1940 25.40% 1.00%
1941 24.90% 0.00%
1942 0.00% 5.40%
1943 0.00% 41.90%
1944 0.00% 0.00%
1945 0.00% 4.20%
1946 43.70% 0.00%
1947 2.10% 17.80%
1948 0.00% 6.10%
1949 4.30% 0.00%
1950 0.00% 69.30%
1951 0.00% 76.00%
1952 0.00% 3.20%
1953 0.00% 3.20%
1954 0.00% 36.00%
1955 0.00% 31.50%
1956 0.00% 7.00%
1957 1.00% 0.00%
1958 2.00% 0.00%
1959 0.00% 0.00%
1960 0.00% 23.10%
1961 3.00% 0.00%
1962 0.00% 0.00%
1963 5.20% 0.00%
1964 0.00% 12.80%
1965 0.00% 67.40%
1966 0.00% 0.00%
1967 0.00% 13.70%
1968 0.00% 3.30%
1969 0.00% 4.20%
1970 0.00% 16.70%
1971 0.00% 0.00%
1972 2.10% 0.00%
1973 4.00% 6.40%
1974 2.20% 0.00%
1975 0.00% 30.60%
1976 0.00% 3.20%
1977 48.90% 0.00%
1978 7.40% 0.00%
1979 0.00% 6.90%
1980 1.00% 0.00%
1981 37.90% 0.00%
1982 0.00% 4.10%
1983 0.00% 1.10%
1984 0.00% 1.10%
1985 41.10% 0.00%
1986 70.70% 0.00%
1987 81.90% 0.00%
1988 10.70% 0.00%
1989 6.40% 0.00%
1990 0.90% 0.00%
1991 43.50% 0.00%
1992 45.70% 0.00%
1993 19.80% 0.00%
1994 31.30% 0.00%
1995 0.00% 3.10%
1996 0.00% 30.90%
1997 0.00% 9.40%
1998 5.90% 0.00%
1999 12.10% 1.00%
2000 21.50% 0.00%
2001 11.80% 0.00%
2002 0.00% 70.40%
2003 11.60% 0.00%
2004 34.90% 0.00%
2005 1.10% 0.00%
2006 14.20% 0.00%
2007 71.60% 0.00%
2008 0.00% 15.90%
2009 0.00% 0.90%
2010 31.40% 3.20%
2011 0.00% 1.00%
2012 75.60% 0.00%
2013 0.00% 29.80%
2014 1.10% 3.10%
2015 16.70% 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.