Well the met office must be confident for friday
Yellow Alert of Snow for Yorkshire & Humber : North Yorkshire, South Yorkshire & West Yorkshire valid from 0005 Fri 22 Mar to 1800 Sat 23 Mar
An area of rain and sleet moving up from the south, will turn increasingly to snow as it does so. Some heavy and persistent snowfall is likely to develop across the higher parts of northern England and much of southern and eastern Scotland away from immediate coastal areas, with in excess of 10 cm of snow in many inland parts, and perhaps much more than this over hills. Taking into account the likelihood of strong to gale force winds, some atrocious conditions with drifting and blizzards are expected for some upland areas in particular, and it is possible that this warning will eventually be upgraded to Amber.
not often ive seen a warning issued 3 days before