The warning, covering all counties, is valid from 2pm on Sunday to 12am on Monday.
Members of the public have been advised to expect some travel disruption.
Forecasters said: "Showers will affect Northern Ireland and Northern England during Sunday and into Monday morning.
"These showers will fall increasingly as snow, particularly above 250m with a mixture of rain, hail, sleet and snow to lower levels. Accumulating snow may lead to travel disruption on routes over high ground, whilst icy stretches are also likely to form on untreated surfaces."
http://www.u.tv/News/Yellow-warning-for-snow-across-NI/b5c3873c-a584-4472-b851-d5d9ced3b40d
Personally I try to avoid yellow snow. 8)
Pah, I thought you lived life on the edge? ;)
Found my first snow of the season today, all white, no yellow 8)
(http://i1222.photobucket.com/albums/dd496/landyliam/Mobile%20Uploads/Image1Small_zps7a04db9a.jpg)