Along with that snowflake of truth, the National Weather Service posted a graphic, "White Christmas History for Philadelphia, PA," with 70 trees. The graphic tells the story of white Christmases ...

It is an interesting idea raised in the documentary. A white Christmas only needs a single snowflake to be recorded at an official weather station on the big day. Northern Ireland has seen just ...

Wrong on all those I'm afraid. That's because according to the Met Office, the definition used to define a 'white Christmas' is "for one snowflake to be observed falling in the 24 hours of 25 ...

Yes. One single snowflake is enough. The most recent official white Christmas in Britain was last year, with 11 percent of stations recording snow falling, though none reported snow actually lying ...

According to the Met Office, a white Christmas is officially recorded whenever a snowflake falls on Christmas day – even if it doesn’t stick on the ground. The most recent time London had a ...