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 13.40% 1.40%
1911 11.20% 3.30%
1912 0.00% 54.90%
1913 3.70% 15.80%
1914 2.30% 6.60%
1915 4.50% 16.20%
1916 2.30% 10.30%
1917 0.70% 40.10%
1918 0.30% 1.20%
1919 0.80% 9.00%
1920 0.50% 18.90%
1921 44.10% 0.20%
1922 0.30% 32.70%
1923 0.00% 8.00%
1924 2.40% 22.10%
1925 34.00% 0.00%
1926 15.90% 13.10%
1927 10.20% 0.50%
1928 1.50% 0.30%
1929 0.70% 27.00%
1930 2.60% 0.00%
1931 20.70% 3.40%
1932 9.00% 6.10%
1933 2.10% 13.20%
1934 42.10% 1.10%
1935 4.30% 1.20%
1936 0.90% 29.10%
1937 0.10% 49.50%
1938 18.80% 2.30%
1939 4.30% 0.90%
1940 1.00% 41.20%
1941 6.80% 7.60%
1942 3.00% 3.00%
1943 7.80% 1.50%
1944 0.00% 10.60%
1945 11.40% 0.30%
1946 44.70% 0.00%
1947 3.20% 6.20%
1948 0.00% 6.20%
1949 10.30% 27.80%
1950 10.50% 18.50%
1951 0.10% 4.60%
1952 0.60% 11.60%
1953 8.10% 0.00%
1954 38.70% 0.20%
1955 0.30% 19.00%
1956 0.00% 2.00%
1957 0.40% 4.90%
1958 1.80% 38.50%
1959 6.10% 1.10%
1960 0.00% 33.20%
1961 3.30% 0.40%
1962 0.00% 3.50%
1963 0.00% 0.00%
1964 0.00% 9.10%
1965 0.00% 9.50%
1966 0.20% 8.70%
1967 12.30% 3.90%
1968 1.60% 8.50%
1969 0.00% 17.40%
1970 0.30% 8.30%
1971 0.90% 3.80%
1972 19.30% 3.30%
1973 1.80% 22.60%
1974 12.60% 0.80%
1975 0.80% 23.10%
1976 28.70% 0.20%
1977 1.80% 0.80%
1978 0.40% 52.70%
1979 0.00% 58.50%
1980 0.30% 13.80%
1981 36.50% 0.20%
1982 0.20% 14.80%
1983 4.00% 19.60%
1984 1.80% 9.00%
1985 0.20% 2.30%
1986 37.50% 0.00%
1987 23.80% 2.20%
1988 5.60% 0.40%
1989 6.10% 0.60%
1990 43.30% 0.00%
1991 4.80% 0.40%
1992 37.30% 0.20%
1993 0.00% 18.70%
1994 10.40% 1.90%
1995 1.80% 0.00%
1996 8.80% 3.60%
1997 3.80% 0.50%
1998 15.80% 0.90%
1999 22.20% 0.50%
2000 56.60% 0.00%
2001 0.10% 0.60%
2002 19.30% 0.00%
2003 4.20% 0.60%
2004 10.40% 0.00%
2005 8.30% 0.70%
2006 58.80% 0.80%
2007 6.80% 0.70%
2008 2.40% 1.10%
2009 10.60% 0.00%
2010 12.70% 10.50%
2011 6.20% 2.10%
2012 80.60% 0.00%
2013 4.10% 0.80%
2014 18.90% 16.60%
2015 38.20% 11.10%

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.