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Rhybuddion

Mawrth 29 Gorffennaf Cyhoeddwyd am 00:05

Rhybuddion DU

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

Rhybudd Tywydd

Issued by the Met Office

Tuesday 29th July 2014

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

Further updates will appear here.

Rhybudd Llifogydd

Issued by the Environment Agency (or by SEPA in Scotland)

Tuesday 29th July 2014

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

Further updates will appear here.

Am Rybuddion Tywydd y Swyddfa Dywydd

Mae BBC Tywydd yn darparu dau fath o rybuddion tywydd a ddosbarthwyd gan y Swyddfa Dywydd: Rhybuddion a Rhybuddion cynnar.

Pan disgwylir tywydd garw, bydd Rhybuddion yn cael eu cyhoeddi o fewn y 24 awr nesaf.

Bydd Rhybuddion cynnar yn cael eu cyhoeddi mwy na 24 awr o flaen tywydd garw.

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

Mae Rhybudd a Rhybudd Cynnar sydd â'r un lliw yr un mor ddifrifol ond 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 manwl ar Rybuddion Tywydd y Swyddfa Dywydd.

Am Rybuddion Llifogydd yr Asiantaeth Amgylchedd

Cyhoeddwyd y Rhybuddion Llifogydd gan yr Asiantaeth Amgylchedd ac Asiantaeth Gwarchod Amgylchfyd yr Alban a danfonwyd nhw i Ganolfan Dywydd y BBC. Rydym ni'n cyhoeddi crynodeb o rybuddion wedi eu seilio ar y gwybodaeth diweddaraf 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 ddarganfod os mae'ch ardal chi mewn perygl o orlifo. Mae'r Asiantaeth Amgylchedd (ar gyfer Lloegr a Chymru) ac Asiantaeth Gwarchod Amgylchfyd yr Alban yn diweddaru eu rhybuddion 24 awr y dydd trwy rif.

Floodline - 0845 988 1188

Rhagolwg Misol

Llun 28 Gorffennaf Cyhoeddwyd am 10:00

Rhagolwg Misol

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

Crynodeb
Respite from the heat and humidity?

The Commonwealth Games opened to high temperatures and strong sunshine, with a maximum temperature of 25C (77F) being recorded in Glasgow on the opening day.

Last week both Scotland and Northern Ireland recorded their highest temperature of the year so far. But the heat and humidity continued to produce thunderstorms and spectacular lightning. With heavy downpours in places and gusty winds reported, impacts included localised flooding whilst lightning caused disruption especially on some trainlines.

However slow changes in our weather pattern were taking place over the weekend.

Llun 28 Gorffennaf—Sul 3 Awst
Cooler with showers

Over recent weeks high pressure over Scandinavia has been responsible for keeping rain-bearing fronts out over the Atlantic and allowing the strong July sunshine a chance to really raise the temperatures.

This week the pattern is set to change with low pressure sitting to the northwest of the UK. We are expecting the majority of showers to be focused across the northwest where they could be heavy and thundery. Southern and eastern areas may see very few showers at the start of the week but the showers become more widespread by the weekend. The day by day detail in the forecast and positioning of showers will be crucial because we will still experience plenty of dry and sunny weather in between the showers, especially in the south and east.

It will stay warm in the southeast but elsewhere temperatures are forecast to be down on recent weeks although still close to, if not, above average at times. The good news is that we will finally lose the muggy nights and sleeping should be much easier!

Llun 4 Awst—Sul 10 Awst
More of the same

At the moment the week starts with low pressure still positioned to the north of the UK. The wettest of the weather is always more likely in the northwest and the southeast stands a better chance of staying dry and bright. Strong winds could also be a feature of the weather this week.

Even though the weather will have an unsettled feel there will still be dry days with sunshine and respectable temperatures. So maybe it's balloons in Bristol or comedy in Edinburgh for your holiday plans - don't despair not every day will bring rain!

By the end of this week there are signs that pressure may start to build and bring some more consistent dry and warm conditions to the south. Northern parts are more likely to keep a greater variety in the weather.

Sul 10 Awst—Sul 24 Awst
Typical summer weather

The big question...will the more unsettled weather pattern at the start of August last or turn out to be a brief interlude in what has, so far, been a warm, sunny summer? Currently, the computer models that we use to generate medium to long term weather forecasts are producing a large variety of possible weather scenarios for the last 2 weeks of August. With that in mind, the most likely set up is for cloudy skies in the north and west with rain or showers at times. Further south and east, there is a better chance of drier, brighter and slightly warmer than average conditions.

Wythnos nesaf

Shorts or trousers for a new term in Scotland and Bank Holiday elsewhere?

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 4 Awst

Crynodeb

Mawrth 29 Gorffennaf Cyhoeddwyd am 02:41

Crynodeb

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

Mainly fine. Some rain in the north and west.
Today

Eastern and southern England remaining fine, dry and warm with plenty of sunny spells. Generally cloudier further north and west with some fragmenting patchy rain moving slowly southeastwards through the day. Scattered showers moving into the far northwest later.

Tonight

Remaining breezy in the northwest with further showers. The band of fragmenting cloud gradually clearing southeastwards to leave a fine and dry night elsewhere with clear spells and light winds.

Wednesday

Most places fine and dry with sunny spells, Still breezy in the northwest with scattered showers, most frequent across parts of Northern Ireland, northern England and southern Scotland.

Outlook for Thursday to Saturday

Showers in the north and west on Thursday, elsewhere generally fine and dry. Turning increasingly unsettled through Friday and Saturday across all areas with sunny spells and scattered heavy showers.

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UK Fideo Rhagolwg

Rhagolwg UK Diweddarwyd 22:52, Llun 28 Gor Mae’r fideo yma ar gael yn Saesneg yn unig.