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 4.40% 2.50%
1911 18.30% 2.90%
1912 0.30% 56.50%
1913 5.00% 25.80%
1914 2.60% 4.00%
1915 0.60% 24.90%
1916 7.00% 11.50%
1917 1.10% 32.60%
1918 0.40% 2.00%
1919 2.70% 12.50%
1920 0.90% 3.90%
1921 49.90% 0.20%
1922 0.00% 28.90%
1923 0.30% 7.20%
1924 1.40% 19.00%
1925 16.80% 0.00%
1926 10.40% 2.60%
1927 7.30% 0.20%
1928 3.10% 0.00%
1929 0.30% 28.00%
1930 1.50% 2.70%
1931 17.50% 1.80%
1932 11.80% 7.70%
1933 4.00% 12.00%
1934 39.40% 2.90%
1935 15.80% 1.00%
1936 0.70% 25.80%
1937 0.30% 49.10%
1938 26.50% 3.50%
1939 10.00% 5.00%
1940 0.30% 39.90%
1941 7.80% 10.50%
1942 1.50% 6.40%
1943 2.20% 0.90%
1944 0.00% 3.70%
1945 7.30% 1.00%
1946 34.00% 0.20%
1947 2.30% 8.40%
1948 0.00% 14.80%
1949 16.10% 43.40%
1950 15.80% 15.10%
1951 0.30% 2.50%
1952 3.60% 18.40%
1953 36.30% 0.00%
1954 11.80% 0.00%
1955 0.00% 13.50%
1956 0.00% 3.10%
1957 1.40% 4.10%
1958 1.90% 39.60%
1959 0.50% 0.70%
1960 0.00% 43.10%
1961 7.50% 0.40%
1962 0.00% 11.40%
1963 0.60% 4.30%
1964 0.70% 8.20%
1965 0.00% 6.60%
1966 0.10% 7.10%
1967 12.20% 0.00%
1968 6.40% 8.20%
1969 0.00% 28.90%
1970 2.10% 16.60%
1971 1.50% 1.70%
1972 17.20% 1.70%
1973 7.20% 15.90%
1974 13.10% 0.90%
1975 0.80% 2.70%
1976 25.40% 0.20%
1977 0.30% 1.70%
1978 2.90% 56.00%
1979 0.00% 60.20%
1980 0.00% 7.50%
1981 29.20% 0.10%
1982 0.50% 9.60%
1983 9.60% 4.40%
1984 4.20% 3.20%
1985 0.00% 9.00%
1986 43.70% 0.00%
1987 16.30% 0.80%
1988 5.30% 0.90%
1989 1.80% 2.40%
1990 44.40% 0.00%
1991 2.60% 0.20%
1992 38.50% 0.40%
1993 0.00% 11.90%
1994 9.20% 7.00%
1995 9.60% 0.00%
1996 8.00% 1.30%
1997 7.20% 0.00%
1998 16.10% 0.50%
1999 31.30% 0.50%
2000 58.80% 0.00%
2001 0.00% 0.80%
2002 16.00% 0.20%
2003 13.80% 0.60%
2004 4.20% 0.00%
2005 8.70% 0.70%
2006 37.20% 0.30%
2007 6.30% 0.40%
2008 1.60% 0.40%
2009 18.60% 0.00%
2010 11.50% 20.50%
2011 2.20% 0.70%
2012 74.20% 0.00%
2013 3.90% 0.40%
2014 20.50% 19.10%
2015 37.10% 14.00%

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.