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Rhybuddion

Iau 30 Hydref Cyhoeddwyd am 02:55

Rhybuddion DU

Rhybudd Tywydd

Cyhoeddwyd gan y Swyddfa Dywydd

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

Thursday 30 October

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

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.

Thursday 30 October

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 27 Hydref Cyhoeddwyd am 10:00

Rhagolwg Misol

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

Crynodeb
Typical autumn if it wasn't so mild

After the remnants of Hurricane Gonzalo gave the United Kingdom its windiest weather of the autumn so far, subsequent low pressure systems from the Atlantic have maintained this changeable weather pattern. This looks set to continue as we go into November. Whilst that may seem business as usual for the time of year, prevailing southwesterly winds look to keep things unusually mild with Jack Frost struggling to find work.

Llun 27 Hydref—Sul 2 Tachwedd
Scotland's soaker heads south

The week starts with a soaking in northwest Scotland from a slow-moving weather front and potential impacts from some places receiving well over 100mm of rain. The front will finally move south through Wales on Tuesday reaching southern England by Wednesday but giving totals significantly lower than seen in Scotland. Behind it higher pressure will on Wednesday give a welcome spell of dry, sunnier weather for Scotland, Northern Ireland and northern England but only after a colder night with a frost for some to start the day. Overall, though, this week's temperatures are expected to be mild or very mild. Cloudier, wetter weather returns from the west by the end of the week as another low pressure system arrives from the Atlantic.

Llun 3 Tachwedd—Sul 9 Tachwedd
Still mild but drier for some

High pressure may push a little further north giving a drier spell of weather for parts of England and Wales. Weather systems will still bring rain at times though so it won't be completely dry and above average rain is signalled for northwest Scotland. Confidence is moderate to high that it will be mild in all areas. Where pressure is higher some nights will be cooler than of late but even here temperatures by day are expected to remain on the mild side.

Llun 10 Tachwedd—Sul 23 Tachwedd
Staying mild

Winter may be approaching but it looks like winter weather isn't.... yet. There is moderate confidence that most parts will be unseasonably mild with temperatures above average by day and night in winds from the south or southwest. There will be some rain at times although the northeast of Scotland will perhaps stay drier with plenty of shelter from the Highlands in the southwesterly flow. With that flow above average rain is signalled for the Highlands. Also some rain may drift up from the continent at times with indications of above average rain in southeast England.

Wythnos nesaf

Will the mild weather give way to something more winter-like? Just don't ask if it's going be a white Christmas yet!

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 3 Tachwedd

Crynodeb

Iau 30 Hydref Cyhoeddwyd am 03:38

Crynodeb

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

Rain clearing to the north, very mild for most.
Today

Rain over Scotland and the north of England first thing will gradually clear northwards leaving most places rather cloudy and mild, with a few brighter spells. However, patchy rain will continue in some western parts through the day.

Tonight

Remaining rather cloudy and very mild, the best of clear spells in the east. Patchy rain will continue in some western areas, perhaps turning heavy and persistent over northwest Scotland.

Friday

Dry across much of the country with warm sunny spells, especially in the south and east. Winds strengthening in the west, with rain spreading into some western parts later.

Outlook for Saturday to Monday

Rain and brisk winds in the northwest spreading southeastwards during the weekend, with cooler showery weather following through Sunday afternoon and continuing through Monday.

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UK Fideo Rhagolwg

Rhagolwg UK Diweddarwyd 12:42, Iau 30 Hyd Mae’r fideo yma ar gael yn Saesneg yn unig.