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Brecon Beacons mountain weather

Tywydd mynyddoedd Bannau Brycheiniog
Enhanced forecast / Rhagolygon manylach
Enhanced forecast / Rhagolygon manylach

 Forecast issued 1645 Friday, 25 July 2008 / Cyhoeddwyd 1645 Dydd Gwener, 25 Gorffennaf 2008

Forecast for daylight hours for Saturday / Rhagolwg ar gyfer oriau'r dydd Dydd Sadwrn
Hazards / Peryglon
Fog
General situation / Sefyllfa cyffredinol
Warm and quite humid air continues to affect the Brecon Beacons
Weather / Tywydd
The day may start quite misty, with local fog around the coasts and in the valleys, but otherwise it should be a bright day with sunshine at times. An isolated shower could still occur, however.
Visibility / Gwelededd
Good but moderate in any showers and locally poor in fog.
Cloud base / Gwaelod y cymylau
Locally 300m or less at first, otherwise on or above the summits
Wind and temperature at 800m / Gwynt a thymheredd at 800m
Variable at 10 to 15mph 12 degc
Freezing level / Lefel rhewi
Above the summits

Forecast for daylight hours for Sunday / Rhagolwg ar gyfer oriau'r dydd Dydd Sul
Weather/ Tywydd
Early mist or fog patches in the valleys will soon lift. Otherwise it should be a bright day with sunshine at times although again an isolated shower could still occur.
Visibility, cloud base / Gwelededd, Gwaelod y cymylau
Good visibility generally but locally moderate or poor in fog or showers. / Cloud base generally on or above the summits.
Wind, temperature, freezing level / Gwynt, thymheredd, lefel rhewi
Variable 10 to 15 mph / Plus 14 degc / Above the summits

Outlook for Monday / Rhagolygon ar gyfer Dydd Llun

Monday will start off rather misty. Otherwise it will be a bright day but with showers developing, some heavy and prolonged. Southeasterly winds will be quite light, up to 15 mph.

Outlook for Tuesday / Rhagolygon ar gyfer Dydd Mawrth

Tuesday will be another showery day, the showers again heavy and prolonged at times. However, the showers should ease off later in the afternoon. Southwesterly winds reaching 25 mph.

Outlook for Wednesday / Rhagolygon ar gyfer Dydd Mercher

Starting misty again in some of the valleys but soon brightening up although an isolated shower could still occur. Moderate southwesterly winds.

Weather forecast for Wales / Rhagolygon y tywydd i Gymru