Met Office - Winter weather advice​​​​​​​​​ ​ ​​​​​​​​​​​External link opens in a new window ​ ​ ​
Gwefan Met Office​​​​​​​​​​​​​​​​​ ​ ​​​​​​​D​olen allanol yn agor mewn ffenest newydd ​ ​