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Dydd Sadwrn, 21 Tachwedd 2009: Wawr hyd Machlud
Printable view Cyhoeddwyd: 0323 on Dydd Sadwrn, 21 Tachwedd 2009
Outbreaks of light rain at first, followed by strengthening winds and heavy rain later this morning. Around sunset rain clearing away east.
| Peryglon | Risgiau | Eglurhad |
|---|---|---|
| Stormydd eira | No Risk | |
| Eira trwm | No Risk | |
| Gwyntoedd nerth storom | Medium | A risk of gusts increasing to around 70 mph this afternoon. |
| Tymhestloedd | High | Southerly winds strengthening this morning. Gusts in excess of 50 mph likely by this afternoon. |
| Effaith oeri difrifol | No Risk | |
| Niwl hirbarhaol ac eang dros y bryniau | High | Hill fog is likely to become extensive above around 600 metres this morning, clearing later. |
| Stormydd o daranau | No Risk | |
| Glaw trwm di-baid | High | Rain is likely to be heavy and persistent from late morning. |
| O'r Wawr hyd 0900 | 0900 hyd 1200 | 1200 hyd 1500 | 1500 hyd Machlud |
![]() Light rain |
![]() Light rain |
![]() Heavy Rain |
![]() Heavy Rain |
| 20% | 80% | 90% | 40% |
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.
Moderate or poor for much of the day in rain and very poor in hill fog.
Occasional patches 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 gusting 60 to 70 mph this afternoon above around 600 metres.
| Dyffrynnoedd | Plus 13 Celsius. |
| 900 m | Plus 8 Celsius. |
| Lefel rhewi | Well above the summits. |
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.
Moderate or good but occasionally poor in heavier showers and very poor in hill fog.
Occasional above around 600 metres with patches at 400 metres in heavier showers.
Wind gusts 70 to 80 mph possible at times above around 600 metres.
| Dyffrynnoedd | Plus 10 to plus 12 Celsius. |
| 900 m | Plus 6 Celsius. |
| Lefel rhewi | Well above the summits. |
Unsettled with further showers or perhaps some longer spells of rain. Strong to gale force westerly winds. Occasional hill fog.
Continuing unsettled with further showers or perhaps some longer spells of rain. Strong to gale force westerly winds. Occasional hill fog.
Another unsettled and windy day with occasional blustery showers and occasional hill fog.
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