Those planning to go walking
in the Brecon Beacons tomorrow (Friday January 18th) will need to be very well equipped - or give it a miss.
A red extreme weather warning has been issued by the Met Office for south Wales, indicating that there will be blizzards over high ground.
It stated: "Many parts of the Red Warning area are likely to have 20-30 cm of snow with strong southeasterly winds causing blizzards, severe drifting of lying snow and thus severe disruption."
People who need to get in their cars to drive to the start-point of their walks should certainly think twice, as the Met Office has advised against non-essential travel.
Those who are heading for the hills in the cold weather should be well prepared with clothing like winter jackets
, good walking boots
.Ordnance Survey maps
and compasses may also be crucial to help avoid getting lost if the visibility gets bad, something that can happen swiftly in snow and when, as now, the daylight hours are short.
Central Brecons Mountain Rescue Team recently helped a couple lost on the highest mountain in the national park - the 2,907 ft Pen-y-Fan - earlier this month.