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 1.10% 2.30%
1911 23.30% 3.90%
1912 0.80% 54.00%
1913 4.80% 39.40%
1914 4.30% 2.50%
1915 0.80% 3.10%
1916 6.50% 11.90%
1917 0.30% 39.20%
1918 0.60% 18.90%
1919 0.40% 7.50%
1920 2.70% 7.20%
1921 46.20% 0.00%
1922 3.20% 29.70%
1923 0.00% 9.30%
1924 0.00% 12.80%
1925 4.90% 1.00%
1926 5.50% 0.10%
1927 18.40% 0.20%
1928 1.00% 0.00%
1929 0.80% 37.50%
1930 0.10% 8.40%
1931 15.10% 1.00%
1932 17.40% 4.20%
1933 4.70% 18.80%
1934 27.10% 8.50%
1935 17.90% 0.30%
1936 0.60% 34.30%
1937 3.70% 48.90%
1938 33.90% 0.20%
1939 0.80% 4.00%
1940 10.40% 30.70%
1941 12.40% 6.10%
1942 1.20% 11.50%
1943 0.40% 4.40%
1944 0.60% 3.60%
1945 8.60% 0.00%
1946 18.80% 3.90%
1947 0.00% 10.30%
1948 0.30% 19.00%
1949 18.90% 38.40%
1950 13.90% 17.10%
1951 0.60% 3.10%
1952 7.10% 7.90%
1953 29.90% 0.00%
1954 1.10% 0.20%
1955 0.00% 21.50%
1956 0.20% 0.40%
1957 13.50% 3.80%
1958 5.00% 16.90%
1959 0.30% 3.30%
1960 0.10% 23.50%
1961 8.60% 0.10%
1962 0.00% 4.00%
1963 0.00% 26.30%
1964 0.10% 23.00%
1965 0.00% 16.00%
1966 0.10% 5.50%
1967 2.10% 0.00%
1968 0.80% 15.10%
1969 0.10% 10.60%
1970 2.00% 18.20%
1971 0.20% 1.90%
1972 0.50% 2.10%
1973 13.20% 2.40%
1974 15.70% 0.60%
1975 0.50% 0.70%
1976 1.40% 1.70%
1977 0.00% 19.90%
1978 22.40% 49.70%
1979 0.10% 40.10%
1980 7.50% 0.20%
1981 12.60% 8.00%
1982 0.20% 8.90%
1983 46.50% 0.00%
1984 6.40% 4.30%
1985 0.00% 10.00%
1986 37.80% 0.00%
1987 20.70% 0.60%
1988 0.20% 4.70%
1989 2.30% 1.80%
1990 50.50% 0.20%
1991 5.10% 0.00%
1992 47.90% 0.20%
1993 6.10% 2.90%
1994 0.70% 6.90%
1995 26.40% 0.00%
1996 4.60% 5.40%
1997 5.40% 0.00%
1998 50.80% 0.00%
1999 26.50% 0.00%
2000 46.90% 0.00%
2001 0.60% 0.00%
2002 11.80% 2.00%
2003 19.40% 0.30%
2004 7.10% 0.10%
2005 28.80% 0.00%
2006 34.00% 0.50%
2007 2.20% 0.70%
2008 0.30% 0.60%
2009 3.40% 0.00%
2010 15.90% 7.90%
2011 0.10% 2.90%
2012 64.10% 0.00%
2013 1.60% 2.80%
2014 7.60% 36.50%
2015 33.30% 13.60%

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.