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Dydd Llun: Rhybudd am law trwm i’r de

Gallai glaw trwm achosi llifogydd a phroblemau teithio mewn mannau o nos Lun i nos Fawrth, mae’r Swyddfa Dywydd, dolen allanol wedi rhybuddio.

Mae’r rhybudd yn berthnasol i dde Cymru, gyda’r bygythiad o adeiladau yn cael llifogydd a cholli cysylltiad trydan yn bosib i nifer o ardaloedd.

Gallai’r glaw effeithio ar ardaloedd Blaenau Gwent, Pen-y-bont, Caerffili, Caerdydd, Sir Gâr, Ceredigion, Merthyr Tudful, Sir Fynwy, Castell-nedd Port Talbot, Casnewydd, Sir Benfro, Powys, Rhondda Cynon Taf, Abertawe, Torfaen a Bro Morgannwg.

Mae 20-40mm o law yn debygol mewn cryn dipyn o ardaloedd, 60-80mm dros dir uchel ac mae siawns fach y gallai 80-100mm ddisgyn dros y bryniau mwyaf agored.


BBC News

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