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Rhybuddion

Llun 30 Mai Cyhoeddwyd am 10:43

Rhybuddion DU

Rhybudd Tywydd

Cyhoeddwyd gan y Swyddfa Dywydd

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

YELLOW WARNING OF RAIN FOR PARTS OF EASTERN ENGLAND

Issued at 1021 on Mon 30 May 2016

Valid from 0015 on Tue 31 to 1200 on Tue 31

A band of rain, heavy and thundery in places, will spread westwards from the early hours of Tuesday morning. There is the risk that rain will turn torrential in places, with frequent lightning. Winds will also increase, with northerly gales on coasts. Whilst most places will miss the worst of the weather, please be aware of the risk of flash flooding.

YELLOW WARNING OF RAIN FOR PARTS OF EASTERN ENGLAND

Issued at:

1026 on Mon 30 May 2016

Valid from 2100 on Tue 31 May to 1200 on Wed 1 Jun

Outbreaks of rain will affect parts of eastern England through much of Tuesday night and Wednesday morning, with the rain becoming torrential at times with the risk of thunder, especially near coasts and over hills exposed to the northeast. Please be aware of the risk of local surface water flooding.

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.

Sunday 29 May

There are no flood warnings in force anywhere in the United Kingdom.

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 30 Mai Cyhoeddwyd am 10:00

Rhagolwg Misol

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

Crynodeb
Early June promises plenty of dry weather

For much of May, we've been looking to the east for weather systems affecting the British Isles. It looks like this pattern will continue for the first half of June, with high pressure sitting to the north of the country. This will bring a lot of dry weather, with northwestern parts expected to see the driest and often the sunniest weather. The second half of the month is likely to see more variable weather, and southeastern parts may see the best of any warmer spells.

Llun 30 Mai—Sul 5 Mehefin
Dry start. Rain for England and Wales midweek.

Bank holiday Monday will see another dry day for many places. Northwest Scotland and Northern Ireland will see a few heavy showers developing, and many eastern counties will be cloudy in the morning. Otherwise there will be plenty of fine, rather warm weather, but eastern coasts will be cool and breezy. For Tuesday and Wednesday, much of England and Wales will be cloudy with outbreaks of rain - some of these heavy and possibly thundery. Scotland and Northern Ireland will be mostly dry with some sunshine, the best of the sunshine over western Scotland. Later in the week, the drier weather will extend southwards with sunny spells in most places, while the northerly breeze will keep eastern coastal areas cooler and sometimes more cloudy. Southeast England keeps the threat of a few showers, even into the weekend, while most of the country should see the dry weather continue, always with the best of the sunshine, and highest temperatures, in the west.

Llun 6 Mehefin—Sul 12 Mehefin
More fine weather, especially in the northwest

The mainly fine weather will continue into the second week of June, with many parts of the country dry and warm with sunny spells, and it may become very warm for a time. East coastal parts may remain cooler with some cloudier periods and there's always the chance of a few showers extending from the continent into the south and southwest of England. Its uncertain whether this fine weather will last all week; later in the week the high pressure may weaken and allow more unsettled conditions to move in from the west.

Llun 13 Mehefin—Sul 26 Mehefin
Mixed weather most likely

At the moment, there is no strong signal from the computer forecasts of any particular weather pattern prevailing later in June. Winds are more likely to come from the west or southwest, for at least one spell of a few days. This would bring some rain and showers at times, with the rain more likely in the southwest and west, where it may be heavy. Eastern parts will see the best of the drier periods, with temperatures on the warm side at times.

Wythnos nesaf

Further into June, will the northwest keep the best weather?

Rhagolygu Misol
Mae rhagolygu’r tywydd hirach nag wythnos ymlaen llaw yn her i hyd yn oed yr arbenigwr tywydd mwyaf profiadol. Mae modelau rhagolwg rhifiadol y tywydd gan y 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 dyfalu sut dywydd fydd yn effeithio ar y DU.

Diweddariad nesaf am 10:00, Llun 6 Mehefin

Crynodeb

Llun 30 Mai Cyhoeddwyd am 00:39

Crynodeb

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

Some warm sunshine developing for many. Cloudier in the south-east.
Today

Early low cloud will gradually retreat to North Sea coasts to leave many with a fine day, particularly in the west. A few showers may affect western Scotland and in the south-east it will be cloudier and breezier.

Tonight

Daytime showers will ease clear spells for many. Cloudier and breezier conditions will continue to spread in with outbreaks of rain in the south-east, turning heavier later.

Tuesday

Rain and stronger winds will continue to edge westwards with some locally heavy bursts in the east; much cooler here. Further west it will remain dry with some warm sunshine.

Outlook for Wednesday to Friday

Unsettled on Wednesday with cloud and rain at times, but drier in the north-west. Gradually becoming drier elsewhere to give a settled end to the week, although cloudier at times.

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Fideo Rhagolwg: DU

Rhagolwg: DU Diweddarwyd 12:48, Llun 30 Mai Mae’r fideo yma ar gael yn Saesneg yn unig.