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
1911 7.30% 1.90%
1912 1.30% 33.00%
1913 4.60% 16.10%
1914 0.30% 2.00%
1915 0.20% 23.50%
1916 3.80% 9.00%
1917 1.50% 32.50%
1918 8.40% 38.40%
1919 11.40% 12.30%
1920 2.50% 19.30%
1921 16.90% 0.30%
1922 1.90% 16.50%
1923 11.50% 3.40%
1924 4.10% 2.80%
1925 1.00% 3.20%
1926 8.10% 1.20%
1927 11.40% 0.30%
1928 0.30% 0.90%
1929 0.20% 32.40%
1930 7.10% 0.40%
1931 24.40% 4.20%
1932 37.30% 14.20%
1933 13.50% 27.00%
1934 50.10% 2.60%
1935 7.90% 1.30%
1936 0.50% 55.70%
1937 9.80% 35.30%
1938 1.70% 0.00%
1939 4.30% 3.30%
1940 6.80% 19.40%
1941 8.00% 0.40%
1942 2.20% 1.60%
1943 13.50% 0.10%
1944 11.80% 2.20%
1945 1.00% 2.90%
1946 0.40% 0.90%
1947 2.10% 0.80%
1948 0.00% 5.20%
1949 23.00% 42.70%
1950 32.30% 11.40%
1951 3.90% 0.10%
1952 22.30% 9.40%
1953 20.60% 0.00%
1954 38.50% 0.00%
1955 0.00% 7.10%
1956 0.40% 4.20%
1957 16.00% 0.10%
1958 17.60% 8.00%
1959 11.90% 4.90%
1960 0.00% 4.10%
1961 8.70% 3.40%
1962 0.20% 5.90%
1963 8.60% 23.40%
1964 0.00% 18.30%
1965 0.20% 2.50%
1966 0.00% 8.30%
1967 5.20% 0.30%
1968 0.60% 5.50%
1969 0.20% 23.40%
1970 8.60% 13.90%
1971 6.00% 1.30%
1972 4.30% 3.80%
1973 0.00% 21.30%
1974 5.90% 1.00%
1975 0.90% 0.80%
1976 20.00% 0.00%
1977 8.00% 32.20%
1978 1.60% 56.80%
1979 0.00% 80.50%
1980 1.20% 0.00%
1981 40.80% 0.50%
1982 0.40% 11.80%
1983 22.20% 0.90%
1984 0.00% 23.10%
1985 0.00% 11.00%
1986 11.10% 0.80%
1987 17.80% 1.80%
1988 1.10% 0.80%
1989 0.80% 5.30%
1990 1.80% 0.00%
1991 7.00% 0.60%
1992 38.30% 1.80%
1993 0.00% 22.60%
1994 1.50% 7.50%
1995 17.60% 0.00%
1996 11.80% 0.00%
1997 1.80% 1.40%
1998 21.50% 0.40%
1999 60.00% 0.20%
2000 53.80% 0.00%
2001 0.20% 14.00%
2002 41.80% 0.40%
2003 16.00% 6.20%
2004 0.00% 0.00%
2005 11.90% 0.70%
2006 30.40% 0.00%
2007 1.90% 1.60%
2008 3.90% 3.00%
2009 13.90% 0.20%
2010 1.70% 39.10%
2011 1.20% 3.50%
2012 49.20% 0.00%
2013 7.20% 0.80%
2014 11.70% 13.20%
2015 29.10% 3.10%

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.