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 1.90% 0.00%
1911 8.70% 0.00%
1912 0.00% 22.80%
1913 0.00% 24.20%
1914 0.00% 8.70%
1915 0.00% 28.80%
1916 0.00% 0.00%
1917 0.00% 66.10%
1918 3.80% 0.00%
1919 0.00% 1.90%
1920 0.00% 26.60%
1921 6.60% 0.00%
1922 6.70% 0.00%
1923 0.00% 18.20%
1924 0.00% 84.30%
1925 29.40% 0.00%
1926 0.00% 35.20%
1927 44.10% 0.00%
1928 0.00% 1.90%
1929 21.20% 0.00%
1930 0.00% 0.00%
1931 0.00% 88.00%
1932 0.00% 6.90%
1933 3.90% 4.80%
1934 6.50% 2.00%
1935 19.50% 0.00%
1936 2.90% 0.00%
1937 0.00% 6.90%
1938 39.40% 0.00%
1939 0.00% 0.00%
1940 0.00% 4.70%
1941 3.50% 1.00%
1942 0.00% 5.80%
1943 0.00% 9.00%
1944 0.00% 9.50%
1945 5.70% 5.60%
1946 36.20% 0.00%
1947 0.00% 45.00%
1948 3.90% 0.90%
1949 0.00% 0.00%
1950 0.00% 17.10%
1951 0.00% 25.50%
1952 0.00% 30.70%
1953 8.90% 0.90%
1954 1.90% 0.90%
1955 33.50% 0.00%
1956 0.00% 0.00%
1957 0.00% 0.00%
1958 0.00% 8.50%
1959 0.00% 1.00%
1960 0.00% 51.80%
1961 0.00% 0.00%
1962 0.00% 2.00%
1963 52.70% 0.00%
1964 0.00% 0.00%
1965 0.00% 0.90%
1966 0.00% 0.90%
1967 34.90% 0.00%
1968 0.00% 1.80%
1969 0.00% 15.60%
1970 0.00% 10.70%
1971 0.00% 37.20%
1972 1.00% 0.00%
1973 0.00% 4.90%
1974 64.50% 0.00%
1975 0.00% 11.50%
1976 0.00% 0.00%
1977 37.40% 0.00%
1978 1.00% 0.90%
1979 0.00% 0.00%
1980 0.00% 31.10%
1981 16.40% 0.00%
1982 1.00% 0.00%
1983 0.00% 61.80%
1984 0.00% 11.90%
1985 68.40% 0.00%
1986 38.90% 0.00%
1987 6.20% 15.80%
1988 0.00% 20.30%
1989 6.70% 0.00%
1990 1.00% 0.00%
1991 74.20% 0.00%
1992 5.50% 0.00%
1993 0.00% 16.40%
1994 1.80% 0.00%
1995 3.90% 0.00%
1996 1.00% 6.30%
1997 0.00% 14.80%
1998 0.90% 0.00%
1999 3.00% 0.00%
2000 34.60% 0.00%
2001 13.90% 0.00%
2002 3.90% 2.70%
2003 7.50% 0.00%
2004 73.30% 0.00%
2005 0.00% 0.00%
2006 77.70% 0.00%
2007 43.20% 0.00%
2008 0.00% 1.80%
2009 1.00% 0.00%
2010 6.40% 1.00%
2011 8.80% 1.90%
2012 97.10% 0.00%
2013 0.00% 42.80%
2014 0.00% 32.30%
2015 15.50% 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.