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Rhybuddion

Sadwrn 28 Chwefror Cyhoeddwyd am 00:00

Rhybuddion DU

Rhybudd Tywydd

Cyhoeddwyd gan y Swyddfa Dywydd

Mae'r cynnwys hwn ar gael yn Saesneg yn unig.

YELLOW WARNING of WIND for Northern Ireland and central and southern Scotland.

Updated: 0001 on Saturday 28th February.

Valid from: 1700 on Saturday 28th February

to: 0400 on Sunday 1st March

Very strong winds are expected on Saturday evening and overnight into Sunday, wind gusts of 50-60 mph quite widely, and in excess of 70 mph over headlands, hills and some bridges.

The public should be aware of the potential for disruption to travel and power supplies.

Rhybudd Llifogydd

Rhybudd gan Asiantaeth yr Amgylchedd neu gan SEPA yn yr Alban a Chyfoeth Naturiol Cymru yng Nghymru

Mae'r cynnwys hwn ar gael yn Saesneg yn unig.

Updated 28 February at 0001

There are no flood warnings currently in force

Ynglŷn â Rhybuddion Tywydd y Swyddfa Dywydd

Mae BBC Tywydd yn darparu dau fath o rybudd tywydd gan y Swyddfa Dywydd: Rhybuddion a Rhybuddion Cynnar.

Bydd Rhybuddion yn cael eu cyhoeddi pan disgwylir tywydd garw o fewn y 24 awr nesaf.

Bydd Rhybuddion Cynnar yn cael eu cyhoeddi mwy na 24 awr cyn tywydd garw.

Mae yna dri chategori o ddigwyddiad: Coch, Ambr a Melyn – y mwyaf difrifol yw Coch.

Mae Rhybudd a Rhybudd Cynnar yr un lliw yr un mor ddifrifol â’i gilydd ond eu bod wedi eu darogan i gyrraedd ar adegau gwahanol. Felly, y gwahaniaeth rhwng Rhybudd Coch a Rhybudd Coch Cynnar yw amseriad y digwyddiad.

Pan mae rhybudd mewn grym, ceir gwybodaeth lawn yn Rhybuddion Tywydd y Swyddfa Dywydd (dolen allanol Saesneg).

Ynglŷn â Rhybuddion Llifogydd

Mae’r rhybuddion llifogydd yn cael eu cyhoeddi gan Asiantaeth yr Amgylchedd, Scottish Environment Protection Agency a Chyfoeth Naturiol Cymru, a’u hanfon at Ganolfan Dywydd y BBC. Yna rydyn ni'n cyhoeddi crynodeb o rybuddion wedi eu seilio ar y wybodaeth ddiweddaraf sydd ar gael. Pan mae rhybuddion llifogydd difrifol yn cael eu rhyddhau, bydd rhain yn cael pwyslais ar ddarllediadau teledu.

Dysgwch mwy am Rybuddion Llifogydd

Mae yna nifer o ffyrdd y gallwch chi ddarganfod os yw eich ardal chi mewn perygl o lifogydd. Mae Asiantaeth yr Amgylchedd, Scottish Environment Protection Agency a Chyfoeth Naturiol Cymru yn diweddaru eu rhybuddion 24 awr y dydd trwy rif Floodline.

Floodline - 0345 988 1188

Rhagolwg Misol

Llun 23 Chwefror Cyhoeddwyd am 10:00

Rhagolwg Misol

Mae'r cynnwys hwn ar gael yn Saesneg yn unig.

Crynodeb
Goodbye Winter, Hello Spring?

This coming week marks the final week of meteorological winter and what has it got in store? Well, fairly standard winter weather with areas of low pressure lining up to the east of the USA aiming directly towards us. What to expect - spells of wind and rain interspersed by brighter and showery weather with a marked swing in the temperature day by day.

Llun 23 Chwefror—Llun 2 Mawrth
The final week of meteorological winter

Monday starts with a deep area of low pressure moving across the north of Scotland bringing strong winds to all and a mixture of sunshine and showers. The showers will have a wintry mix of rain, sleet and snow. Snow will mostly be confined to hills of England and Wales, though it could fall to low levels over Scotland and Northern Ireland temporarily. A very similar situation will persist into Tuesday with sunshine and scattered wintry showers. It will windy for all both days with gales possible anywhere, the winds most severe for the northwest. On Wednesday it is likely we will see a brief interlude of calmer weather with some brighter, drier weather before the next Atlantic system pushes in, late in the day. The associated band of rain is sluggish to clear on Thursday giving a fairly soggy start for the south and east though, even here, it should brighten up later with plenty of showers packing in from the northwest. And that is how we leave the week, with sunshine and showers on Friday awaiting the next bout of wind and rain at the weekend.

Llun 2 Mawrth—Sul 8 Mawrth
New month new weather pattern?

We start the first week of march with a continuing unsettled theme however as we progress though the week, pressure may start to build towards the south of the country with low pressure becoming increasingly confined to northern areas. It is likely that there will still be bouts of wet and windy weather with gales for north-western areas. But interspersed amongst the low pressure will be sunnier periods, these most frequent across the south of the UK.

Llun 9 Mawrth—Sul 22 Mawrth
The first signs of spring?

As we move into mid-march it looks like occasional signs of spring-like weather may start to appear over the UK, especially in the south. It looks as though there will still be spells of wet and windy weather from time to time but there is an increasing trend for high pressure to build in from the south. This would typically bring some sunny spells by day but chilly nights with the risk of overnight fog and patches of frost.

Wythnos nesaf

As the clocks spring forward to British Summer Time, what will the weather bring?

Rhagolygu Misol
Mae'r tywydd y tu hwnt i'r wythnos i ddod yn herio hyd yn oed yr arbenigwr tywydd mwyaf profiadol. Mae modelau rhagolwg rhifiadol y tywydd o'r Swyddfa Dywydd a'r Ganolfan Ewropeaidd ar gyfer Rhagolygon Tywydd Ystod-Canolig (ECMWF) yn cael eu rhedeg nifer o weithiau'r mis (a'r tymor) i ddod, er mwyn creu darlun o'r tebygoliaeth o'r gwahanol fathau o dywydd fydd yn effeithio'r DU.

Diweddariad nesaf am 10:00, Llun 2 Mawrth

Crynodeb

Sadwrn 28 Chwefror Cyhoeddwyd am 03:39

Crynodeb

Mae'r cynnwys hwn ar gael yn Saesneg yn unig.

Rather cloudy with some brighter spells. Wet, very windy later.
Today

Low cloud and mist slow to clear central/eastern England this morning. Rather cloudy elsewhere with some patchy light rain and drizzle, but also some brighter spells, especially in the northeast. Turning wet and very windy from the west later.

Tonight

Very windy with gales for many, locally severe across Northern Ireland and southern Scotland. Rain moving east, heaviest in the northwest. Clearer, colder, showery conditions spreading from the northwest later.

Sunday

Very windy, gales for many, locally severe in the north at first. Sunshine and blustery showers, heaviest and increasingly wintry in northwest. Longer spells of rain possible in the south.

Outlook for Monday to Wednesday

Cold and windy with further wintry showers through Monday and Tuesday. Showers merging into longer spells of rain and snow at times. Turning less unsettled from the southwest Wednesday.

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Rhagolwg UK Diweddarwyd 00:05, Sadwrn 28 Chw Mae’r fideo yma ar gael yn Saesneg yn unig.