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 2.50% 1.90%
1911 21.50% 7.40%
1912 0.70% 45.20%
1913 2.60% 30.30%
1914 6.40% 2.50%
1915 3.30% 2.40%
1916 3.00% 15.50%
1917 0.00% 63.40%
1918 0.40% 12.60%
1919 1.00% 3.60%
1920 0.80% 16.70%
1921 40.00% 1.00%
1922 11.20% 29.80%
1923 0.40% 11.80%
1924 0.00% 36.80%
1925 11.50% 0.20%
1926 10.90% 9.70%
1927 25.60% 0.40%
1928 1.70% 1.00%
1929 3.10% 41.10%
1930 0.50% 2.80%
1931 11.00% 6.80%
1932 5.10% 3.80%
1933 12.20% 25.80%
1934 37.50% 7.50%
1935 6.20% 1.00%
1936 1.30% 32.90%
1937 1.40% 36.50%
1938 32.40% 0.20%
1939 0.00% 1.40%
1940 14.20% 37.20%
1941 15.40% 4.10%
1942 2.00% 13.00%
1943 0.80% 6.20%
1944 0.50% 4.90%
1945 1.60% 0.70%
1946 17.40% 1.00%
1947 0.00% 11.10%
1948 0.30% 10.70%
1949 13.50% 27.00%
1950 8.60% 25.90%
1951 1.00% 6.40%
1952 0.60% 3.00%
1953 15.90% 0.40%
1954 3.60% 0.10%
1955 2.30% 28.20%
1956 0.00% 2.90%
1957 14.20% 0.50%
1958 7.80% 13.30%
1959 0.30% 0.50%
1960 0.30% 22.00%
1961 5.00% 0.80%
1962 0.00% 0.60%
1963 0.00% 12.60%
1964 0.00% 22.40%
1965 0.00% 6.50%
1966 0.00% 8.30%
1967 0.80% 1.50%
1968 0.00% 12.40%
1969 0.20% 5.00%
1970 0.30% 4.00%
1971 0.00% 22.20%
1972 0.20% 2.00%
1973 6.70% 5.60%
1974 14.50% 0.90%
1975 0.80% 10.00%
1976 0.60% 1.20%
1977 1.50% 8.70%
1978 15.20% 44.30%
1979 0.50% 40.10%
1980 2.90% 2.30%
1981 19.30% 6.80%
1982 0.20% 8.90%
1983 18.60% 3.20%
1984 3.70% 5.10%
1985 0.00% 4.80%
1986 41.20% 0.20%
1987 30.50% 1.10%
1988 0.00% 16.80%
1989 1.60% 0.80%
1990 33.90% 0.00%
1991 36.90% 0.20%
1992 56.60% 0.00%
1993 5.60% 0.60%
1994 5.90% 5.80%
1995 12.90% 0.00%
1996 7.30% 4.60%
1997 7.00% 0.10%
1998 50.70% 0.30%
1999 30.30% 0.30%
2000 59.20% 0.00%
2001 5.90% 0.00%
2002 9.20% 1.20%
2003 17.10% 0.40%
2004 15.90% 0.00%
2005 19.60% 0.10%
2006 49.60% 0.00%
2007 3.70% 0.40%
2008 0.30% 3.20%
2009 3.90% 0.40%
2010 13.30% 2.80%
2011 0.60% 4.00%
2012 70.30% 0.20%
2013 2.00% 2.20%
2014 9.20% 31.00%
2015 29.40% 7.10%

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.