Forecast issued 1645 Monday, 06 October 2008 / Cyhoeddwyd 1645 Dydd Llun, 06 Hydref 2008
| Forecast for daylight hours for Tuesday / Rhagolwg ar gyfer oriau'r dydd Dydd Mawrth |
| Hazards / Peryglon Heavy rain, gales and hill fog. |
| General situation / Sefyllfa cyffredinol Mild, cloudy and disturbed weather covers the UK on Tuesday, improving overhead and cooler for Wednesday, but shortlived with more poor conditions developing later this week |
| Weather / Tywydd An overcast rainy day with the rain often persistent and occasionally heavy. Hill fog will also be extensive. |
| Visibility / Gwelededd Mostly moderate but occasionally poor. 200 metres in hill fog. |
| Cloud base / Gwaelod y cymylau Overcast base mostly 300 to 500 metres. Occasionally patches 150 metres. Tending to lift marginally to broken 500 to 700 metres by dusk. |
| Wind and temperature at 900m / Gwynt a thymheredd at 900m Southeast 25 to 40mph, swinging through Southwest to West by late afternoon, then West 50mph gusts 65mph by dusk. 12 reducing 7 Celsius. |
| Freezing level / Lefel rhewi Above summits. |
| Forecast for daylight hours for Wednesday / Rhagolwg ar gyfer oriau'r dydd Dydd Mercher |
| Weather/ Tywydd A brighter day with blustery showers and sunny spells. Most showers brief in nature with patchy hill fog. Showers most likely during the morning and early afternoon. |
| Visibility, cloud base / Gwelededd, Gwaelod y cymylau Excellent briefly reducing moderate during showers. 200 metres in hill fog. Well broken or broken 800 to 1000 metres, some temporary banks 600 metres in showers. Some gaps to limited patches around 1300 metres, especially well inland across eastern parts of Snowdonia and later in the day. |
| Wind, temperature, freezing level / Gwynt, thymheredd, lefel rhewi West 30mph, gusts 40mph, easing Southwest 20mph later. Temperature 6 Celsius with freezing level above summits. |
Outlook for Thursday / Rhagolygon ar gyfer Dydd Iau
Starting dry and bright with good sunny spells through till lunchtime. However cloud will rapidly thicken to bring rain in from the west coast later, turning heavy by dusk. Hill fog will develop widely later, especially on west facing hills. Southwest winds will increase to near gale force over hills with gusts 45mph. Turning much milder.
Outlook for Friday / Rhagolygon ar gyfer Dydd GwenerDull, wet and windy with widespread hill fog and drizzly rain. The rain turning heavier later in the day. Strong Southwesterly winds or gales will persist over summits and hill fog will remain quite extensive.
Outlook for Saturday / Rhagolygon ar gyfer Dydd SadwrnA bright mainly dry day with some good sunny intervals. West to Southwest winds expected to be moderate or fresh over hills with just limited patchy hill fog.
Weather forecast for Wales / Rhagolygon y tywydd i Gymru
