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
1911 15.60% 3.60%
1912 0.20% 32.30%
1913 3.90% 24.80%
1914 2.80% 2.10%
1915 0.20% 2.80%
1916 3.50% 9.70%
1917 0.20% 44.60%
1918 4.80% 53.10%
1919 12.10% 9.60%
1920 4.90% 18.90%
1921 23.50% 1.90%
1922 5.90% 14.50%
1923 11.80% 4.40%
1924 0.20% 2.00%
1925 1.00% 7.10%
1926 14.10% 0.00%
1927 18.10% 0.00%
1928 0.00% 1.10%
1929 0.00% 45.60%
1930 1.30% 2.00%
1931 26.20% 1.80%
1932 44.30% 10.40%
1933 8.70% 33.30%
1934 26.80% 5.10%
1935 4.70% 1.60%
1936 0.20% 52.70%
1937 14.40% 39.70%
1938 14.40% 0.00%
1939 0.00% 1.50%
1940 15.30% 16.00%
1941 23.30% 0.20%
1942 2.70% 1.90%
1943 1.70% 0.30%
1944 0.50% 1.00%
1945 0.90% 1.50%
1946 0.20% 5.00%
1947 0.30% 0.20%
1948 0.20% 9.00%
1949 22.30% 39.70%
1950 25.30% 16.30%
1951 3.50% 2.60%
1952 18.00% 2.20%
1953 27.60% 0.20%
1954 7.20% 0.60%
1955 0.00% 12.70%
1956 1.40% 2.60%
1957 27.40% 3.10%
1958 16.80% 8.10%
1959 4.70% 14.90%
1960 2.60% 1.40%
1961 3.60% 6.70%
1962 0.00% 2.90%
1963 0.50% 38.80%
1964 0.00% 37.20%
1965 1.30% 4.90%
1966 0.00% 2.70%
1967 6.60% 2.10%
1968 0.20% 2.50%
1969 0.30% 8.60%
1970 9.00% 16.10%
1971 0.80% 1.00%
1972 7.80% 2.40%
1973 0.00% 5.70%
1974 6.10% 1.90%
1975 2.60% 1.80%
1976 5.50% 0.70%
1977 0.30% 47.20%
1978 23.20% 50.10%
1979 0.00% 63.80%
1980 11.60% 0.00%
1981 22.30% 6.40%
1982 0.30% 10.10%
1983 43.60% 0.00%
1984 1.00% 18.60%
1985 0.20% 11.30%
1986 10.60% 0.80%
1987 24.70% 0.60%
1988 0.00% 1.30%
1989 0.20% 8.40%
1990 1.30% 3.50%
1991 5.40% 2.90%
1992 49.00% 0.40%
1993 2.50% 9.70%
1994 1.30% 6.80%
1995 34.10% 0.00%
1996 12.00% 0.50%
1997 8.30% 0.00%
1998 53.20% 0.00%
1999 39.80% 0.30%
2000 36.20% 0.00%
2001 0.20% 2.20%
2002 28.10% 0.80%
2003 20.10% 0.30%
2004 0.80% 0.30%
2005 31.70% 0.00%
2006 20.80% 0.40%
2007 1.80% 1.70%
2008 1.30% 0.60%
2009 1.90% 0.30%
2010 1.90% 6.20%
2011 0.40% 7.50%
2012 38.10% 0.50%
2013 16.60% 2.30%
2014 3.00% 27.00%
2015 34.70% 1.60%

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.