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The Grounds and Meteorological Officer, Shane Kelly, and other staff members, have continued to take daily measurements of the weather at Armagh throughout the year. Despite the warming trend of recent years, falling snow at the Observatory on 25 December made 2004 the fourth White Christmas at Armagh in nine years. Previous recent instances of snow at Armagh on Christmas Day have been 1995, 1999 and 2001, prior to which we must go back to 1980 for another example. Figure 4 illustrates the 2004 White Christmas.

Figure: 4 The 2004 White Christmas at Armagh Observatory. Image courtesy of Miruna Popescu.