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 2.00% 1.60%
1911 22.30% 6.00%
1912 0.80% 50.00%
1913 4.60% 34.80%
1914 5.80% 2.90%
1915 4.30% 3.40%
1916 5.90% 12.80%
1917 0.50% 46.90%
1918 0.40% 25.10%
1919 0.30% 4.00%
1920 0.80% 10.80%
1921 42.50% 0.80%
1922 9.10% 31.40%
1923 0.80% 9.90%
1924 0.00% 17.00%
1925 12.10% 1.00%
1926 10.80% 4.40%
1927 23.70% 0.20%
1928 0.60% 0.70%
1929 2.60% 35.60%
1930 1.00% 1.10%
1931 12.90% 3.30%
1932 10.00% 4.20%
1933 4.00% 20.80%
1934 30.10% 8.70%
1935 13.80% 0.00%
1936 1.00% 44.80%
1937 1.90% 47.20%
1938 32.30% 0.20%
1939 0.50% 3.10%
1940 11.90% 34.70%
1941 10.20% 4.20%
1942 2.60% 10.10%
1943 1.30% 2.40%
1944 0.00% 5.00%
1945 10.60% 0.50%
1946 25.90% 1.00%
1947 0.00% 8.00%
1948 0.50% 10.10%
1949 14.50% 33.60%
1950 5.70% 21.00%
1951 1.60% 8.30%
1952 2.20% 4.80%
1953 14.10% 0.00%
1954 6.30% 0.20%
1955 0.40% 26.50%
1956 0.00% 4.60%
1957 16.30% 4.00%
1958 4.10% 17.70%
1959 0.50% 3.10%
1960 0.00% 12.00%
1961 5.90% 0.80%
1962 0.00% 2.30%
1963 0.00% 13.20%
1964 0.00% 22.10%
1965 0.30% 9.40%
1966 0.10% 6.70%
1967 1.90% 1.10%
1968 0.00% 12.70%
1969 0.20% 8.10%
1970 0.30% 7.40%
1971 0.20% 10.80%
1972 0.70% 3.20%
1973 12.30% 4.30%
1974 11.30% 1.00%
1975 0.30% 6.00%
1976 3.00% 2.70%
1977 0.00% 14.90%
1978 21.30% 46.40%
1979 0.10% 38.60%
1980 6.10% 3.30%
1981 24.20% 3.10%
1982 0.20% 19.50%
1983 31.50% 2.50%
1984 5.80% 7.40%
1985 0.00% 5.80%
1986 41.00% 0.20%
1987 22.50% 1.50%
1988 0.00% 10.90%
1989 2.10% 1.30%
1990 46.10% 0.00%
1991 18.00% 0.00%
1992 57.00% 0.20%
1993 5.80% 1.80%
1994 4.10% 3.70%
1995 17.30% 0.00%
1996 6.20% 15.40%
1997 2.20% 0.20%
1998 43.00% 0.20%
1999 29.70% 0.00%
2000 45.50% 0.00%
2001 2.90% 0.00%
2002 13.30% 0.70%
2003 15.30% 0.70%
2004 11.00% 0.10%
2005 23.90% 0.00%
2006 49.10% 0.00%
2007 1.00% 0.40%
2008 1.00% 2.50%
2009 1.90% 0.40%
2010 14.80% 7.70%
2011 0.30% 2.30%
2012 68.70% 0.00%
2013 1.40% 2.40%
2014 8.50% 36.00%
2015 30.50% 10.50%

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.