Did we have a White Christmas?
The majority of people in southern Wisconsin woke up to a white Christmas (defined as a snow depth of at least 1 inch on the ground). People in far southeast Wisconsin and those near the lake shore were least likely to experience a white Christmas, as snow depth reports in those areas ranged from a trace to an inch on Christmas Day. Elsewhere, those along and northwest of a line from Johnsonville, to Germantown, to Oconomowoc, to Palmyra, to Janesville saw snow depths that were generally greater than or equal to three inches. The graphic below is an analysis of snow depth as of 7 am CST on Christmas Day.
Milwaukee:
Records show that there has been a white Christmas approximately 48 percent of the time. Over the 119 year period of snow depth records, there have been 57 occurrences of an inch or more of snow on the ground on Christmas Day.
Below are the last 10 years on record for when we had a Christmas Eve or a Christmas Day without any snow on the ground and no snowfall occurring on that day. Snowfall records go back to 1884 and snow depth records go back to 1893.
Year
Dec. 24 2011
Dec. 24 2006
Dec. 24 2004
Dec. 24 1998
Dec. 24 1996
Dec. 24 1990
Dec. 24 1986
Dec. 24 1982
Dec. 24 1971
Dec. 24 1946
Year
Dec. 25 2011
Dec. 25 2006
Dec. 25 1998
Dec. 25 1995
Dec. 25 1986
Dec. 25 1982
Dec. 25 1955
Dec. 25 1943
Dec. 25 1939
Dec. 25 1938
Dec 24 2012 30 23 T T 1
Dec. 24 2011 39 22 0.00 0.0 0
Dec. 24 2010 32 26 T T T
Dec. 24 2009 37 32 0.44 0.1 4
Dec. 24 2008 36 9 0.14 1.4 13
Dec. 24 2007 23 18 0.00 0.0 2
Dec. 24 2006 45 27 0.00 0.0 0
Dec. 24 2005 38 32 T 0.0 3
Dec. 24 2004 10 -4 0.00 0.0 0
Dec. 24 2003 28 16 T T T
Dec. 24 2002 30 20 T 0.1 0
Data for Christmas Day over the past 11 years...
Milwaukee climate statistics for Christmas Day (normals are derived from 1981-2010 data):
Records show that there has been a white Christmas approximately 68 percent of the time. Over the 107 year period of snow depth records, there have been 73 occurrences of an inch or more of snow on the ground on Christmas Day.
Below are the last 10 years on record for when we had a Christmas Eve or a Christmas Day without any snow on the ground and no snowfall occurring on that day. Snowfall records go back to 1884 and snow depth records go back to 1905.
Year
Dec. 24 2006
Dec. 24 2002
Dec. 24 1982
Dec. 24 1971
Dec. 24 1957
Dec. 24 1943
Dec. 24 1939
Dec. 24 1932
Dec. 24 1917
Dec. 24 1913
Year
Dec. 25 2006
Dec. 25 1982
Dec. 25 1979
Dec. 25 1971
Dec. 25 1955
Dec. 25 1943
Dec. 25 1939
Dec. 25 1936
Dec. 25 1931
Dec. 25 1917
Data for Christmas Eve over the past 11 years...
Dec. 24 2012 24 11 T T 9
Dec. 24 2011 39 20 0.00 0.0 T
Dec. 24 2010 28 23 0.01 2.0 7
Dec. 24 2009 35 32 0.46 T 7
Dec. 24 2008 31 4 0.28 2.9 13
Dec. 24 2007 20 15 T T 6
Dec. 24 2006 42 21 0.00 0.0 0
Dec. 24 2005 35 28 T 0.0 5
Dec. 24 2004 12 -6 0.00 0.0 T
Dec. 24 2003 25 12 0.00 0.0 T
Dec. 24 2002 26 11 0.00 0.0 0
Data for Christmas Day over the past 11 years...
Madison climate statistics for Christmas Day (normals are derived from 1981-2010 data):
Normal high.................28 degrees
Normal low..................13 degrees
Normal precip..............0.04 inches
Normal snowfall...........0.4 inches
Warmest high...............56 in 1982
Coldest low..................-21 in 2000
Coldest high.................-5 in 1983
Warmest low................45 in 1936
Most precipitation.........0.67 in 1876
Most snowfall...............3.5 in 1950
Highest snow depth.....16 in 1985
A white Christmas is defined as a snow depth of at least 1 inch on the ground on Christmas day. The map below shows the climatological probability (in percent) that a snow depth of 1 inch will be observed on Christmas day for the Continental United States (from the National Climatic Data Center). This probability is based on the 1981-2010 Climate Normals. Note: this is a climatological probability and the actual conditions observed can vary. In southern Wisconsin, southeast Wisconsin lies in the 40 - 50 % range and northwest corner of southern Wisconsin lies in the 60 - 75% range. Essentially, this map shows that roughly 1 out of 2 Christmas holidays would meet the conditions for a white Christmas in the far southeast -- with chances increasing as you go northwest.