Issued 0328 GMT Saturday, 21 November 2009
/
Cyhoeddwyd 0328 GMT Dydd Sadwrn, 21 Tachwedd 2009
 Sunrise / Codiad Haul : 0753 GMT, Sunset / Machlud Haul : 1612
GMT |
Hazards / Peryglon
Storm force winds. Gales. Persistent extensive hill fog. Heavy persistent rain. |
Forecast for daylight hours for Saturday / Rhagolwg ar gyfer oriau'r dydd Dydd Sadwrn
| General situation / Sefyllfa cyffredinol Outbreaks of light rain at first, followed by strengthening winds and heavy rain later this morning. Around sunset rain clearing away east. | ||
| Weather / Tywydd A cloudy start with outbreaks of mostly light rain. The rain becoming heavier later this morning as southerly gales develop over the higher ground, with hill fog becoming extensive. Late afternoon, around sunset, drier and clearer weather arriving from the west. | ||
| Visibility / Gwelededd Moderate or poor for much of the day in rain and very poor in hill fog. | ||
| Cloud base / Gwaelod y cymylau Occasional patchesof low cloud above around 300 metres at first, mainly in the east. Becoming widespread or blanket above around 600 metres later this morning, then clearing from the west around sunset. | ||
| Wind / Gwynt | Temperature / Thymheredd | |
| 300m | Southeast 15 mph increasing 20 to 30 mph with gusts around 40 mph. | Plus 13 Celsius. |
| 500m | Southerly 20 to 30 mph increasing 40 mph with gusts 50 to 60 mph this afternoon. | Plus 10 Celsius. |
| 900m | Wind gusting 60 to 70 mph this afternoon above around 600 metres. | Plus 8 Celsius. |
| Freezing level / Lefel rhewi Well above the summits. | ||
Forecast for daylight hours for Sunday / Rhagolwg ar gyfer oriau'r dydd Dydd Sul
| Weather / Tywydd A very windy day. Bright or sunny spells are likely at times with broken cloud but there will be frequent blustery showers, heavy and sometimes prolonged, especially in the afternoon. Gale or perhaps severe gale force south or southwest winds. Occasional hill fog. |
| Visibility and cloud base / Gwelededd a gwaelod y cymylau Moderate or good but occasionally poor in heavier showers and very poor in hill fog.. Occasional low cloud above around 600 metres with patches at 400 metres in heavier showers. |
| Wind, temperature and freezing level / Gwynt, thymheredd a lefel rhewi Wind gusts 70 to 80 mph possible at times above around 600 metres. / Plus 6 Celsius. / Well above the summits. |
Outlook for Monday / Rhagolygon ar gyfer Dydd Llun
Unsettled with further showers or perhaps some longer spells of rain. Strong to gale force westerly winds. Occasional hill fog.
Outlook for Tuesday / Rhagolygon ar gyfer Dydd Mawrth
Continuing unsettled with further showers or perhaps some longer spells of rain. Strong to gale force westerly winds. Occasional hill fog.
Outlook for Wednesday / Rhagolygon ar gyfer Dydd Mercher
Another unsettled and windy day with occasional blustery showers and occasional hill fog.
Produced by Met Office in association with
