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Rhybuddion

Iau 11 Chwefror Cyhoeddwyd am 13:36

Rhybuddion DU

Rhybudd Tywydd

Cyhoeddwyd gan y Swyddfa Dywydd

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

YELLOW warning of Snow for NE Scotland

Issued at 1038 on Thu 11 Feb 2016

Valid from 0900 on Fri 12 Feb 2016 to 2350 on Fri 12 Feb 2016

A band of sleet or snow showers will affect parts of northern Scotland during Friday before moving slowly southwards. Snow will be initially confined to high ground but will start falling to lower levels away from coasts. 2-6 cm of snow down to low levels locally and up to 10 cm on hills.

YELLOW warning of WIND in SW England

Issued at 1010 on Thu 11 Feb 2016

Valid from 0500 on Sat 13 Feb 2016 to 1200 on Sat 13 Feb 2016

An area of very strong winds and large waves is expected to pass close to southwest England on Saturday morning. The most likely scenario is that winds will remain light over the bulk of the area. However, please be aware that there is a low risk of gusts of 60-80 mph and large waves affecting coastal Devon and Cornwall .

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.

FLOOD WARNINGS

Updated at 13:00 on 11th Feb 2016

There are flood warnings in force in the following regions:

ANGLIAN (1)

NORTHWEST (2)

SOUTHWEST (8)

SOUTHEAST (1)

MIDLANDS (20)

WALES (1)

NORTHEAST (4)

Further updates will appear here.

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 8 Chwefror Cyhoeddwyd am 10:00

Rhagolwg Misol

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

Crynodeb
Blowing hot and cold

As we went through the first week of February, the last month of the meteorological winter, there were some early signs of spring. Temperatures last Monday reached 15 Celsius in Hull, and again on Thursday at Usk in Wales. As well as the milder temperatures, there was a changeable look to early February. Storm Henry, a very deep area of low pressure passed just to the north of Scotland on Monday and brought a gust of 90mph at South Uist in the Outer Hebrides of Scotland .

There were also some colder nights, especially Tuesday night with wintry showers resulting in a covering of snow on higher parts of the M62 motorway. This past weekend saw further spells of wet and windy weather across the country, a gust of 76mph was recorded at Plymouth on Saturday afternoon.

Llun 8 Chwefror—Sul 14 Chwefror
Wind problems look set to continue

A lot going on weather-wise this week. Storm Imogen will cross the UK during Monday bringing very strong winds to southern areas and showers in many places, continuing into Tuesday. Then a quieter period of weather mid-week before another deep area of low pressure moves in from the Atlantic late in the week bringing strong winds and outbreaks of rain.

So looking at this week in a bit more detail. Monday will be a showery day and very windy in the south, severe gales or even storm force winds will affect south Wales and southern England. The centre of the low pressure will be over Scotland and here winds will remain light. To the south of the low centre, showers will be frequent and heavy with hail and thunder. Showers becoming fewer during Tuesday but still frequent over northeast Scotland where it will be windy. Winds veering into a northwesterly direction introducing colder air to all parts with the showers in the north falling as snow on high ground. The weather will draw a breath on Wednesday with something altogether quieter with fewer showers and lighter winds. It will be a colder night on Tuesday night and Wednesday night with a frost developing.
The weather is set to turn more unsettled again during Thursday and into Friday with another area of low pressure moving in from the Atlantic. It is again expected to bring wet and windy weather to many areas although Scotland will be drier, brighter and colder with wintry showers. The low pressure will remain close by over the weekend with showers in many areas, wintry on high ground.

Llun 15 Chwefror—Sul 21 Chwefror
Weather rollercoaster continues

It looks like an unsettled and cold start to the week with strong northerly winds and blustery showers, falling as snow on higher ground in the north. Then a brief ridge of high pressure will follow from the west during the early part of the week bringing drier conditions. The settled weather is not expected to last for too long before we begin to see further areas of low pressure coming our way across the Atlantic Ocean. At this stage it looks as though the track of the low pressure systems will move back to the north of the British Isles. This will mean the wettest and windiest weather is likely to be over parts of Scotland and Northern Ireland.
There are also indications as we go towards the end week that high pressure will begin to build up from the south with something in the way of more settled conditions reaching many parts of England and Wales.

Llun 22 Chwefror—Sul 6 Mawrth
Will February finish on a high?

As we head towards the end of February, there is a signal for further areas of low pressure to come our way across the Atlantic. However the various weather forecast models do show a large variety of tracks of these low pressure systems but mostly expected to pass to the north of the UK. This will allow high pressure to build at times, especially in the south bringing longer drier, brighter spells with lighter winds. This will also mean some cold and frosty nights. However we are still likely to see spells of wet and windy weather crossing from the west, more especially over the north of the country. These unsettled conditions will make their way southwards from time to time.

Wythnos nesaf

As we move into the meteorological spring will winter have a sting in its tail?

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 15 Chwefror

Crynodeb

Iau 11 Chwefror Cyhoeddwyd am 15:37

Crynodeb

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

Frost and scattered showers. Some snow across eastern Scotland tomorrow.
This Evening and Tonight

Cold with scattered showers. The showers mainly towards the south and near the coast, but falling briefly as sleet or snow on high ground. Becoming widely frosty with fog patches, especially across northern, eastern and central Britain.

Friday

Cold with broken cloud and scattered showers. The showers falling as sleet or snow on higher ground. More persistent sleet or snow potentially edging southwards across eastern Scotland.

Outlook for Saturday to Monday

Wet and breezy with hill snow in the south Saturday, but brighter with wintry showers in north. Colder with brisk northerly winds and occasional sleet or snow showers Sunday onwards.

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