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Rhybuddion

Mercher 28 Ionawr Cyhoeddwyd am 13:25

Rhybuddion DU

Rhybudd Tywydd

Cyhoeddwyd gan y Swyddfa Dywydd

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

YELLOW WARNING OF SNOW for northern England, The Midlands, Scotland, central Wales and Northern Ireland.

Updated 12:00 on Wednesday 28th January.

Valid from: 1130 on Wednesday 28th January.

To: 2355 on Thursday 29th January.

Showers of snow across parts of Scotland and Northern Ireland on Wednesday morning will extend to parts of northern England and Wales by evening, then continue overnight and into Thursday.

Over Scotland, Northern Ireland and parts of northern England 5 cm or more may fall even at some lower levels, with more than 15 cm possible over higher ground. See separate amber warning for main risk areas. Over Wales only 1-3 cm is likely in places at low levels with 5-10 cm possible over higher ground. Strong, gusty winds will lead to drifting and temporary blizzard conditions over high ground, while icy surfaces and lightning pose additional risks in some areas.

This is an update to the warning issued on Monday to extend the warning a little further south into parts of Wales.

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

AMBER WARNING OF SNOW for western and southern Scotland, northwest England and Northern Ireland.

Updated 10:58 on Wednesday 28th January.

Valid from: 1700 on Wednesday 28th January.

To: 1100 on Thursday 29th January.

Snow showers will become widespread and heavier across Scotland, Northern Ireland and northern England during Wednesday evening and will continue through the night into Thursday morning. Snow amounts will be very variable but over 5 cm will accumulate at lower levels in places with over 15 cm on high ground. Strong and gusty winds will lead to drifting and blizzard conditions at times, especially over higher routes.

The public should be prepared for travel disruption and hazardous driving conditions.

YELLOW WARNING OF SNOW for northern Scotland and Northern Ireland.

Updated 13:22 on Wednesday 28th January.

Valid from: 1200 on Saturday 31st January

To: 2355 on Saturday 31st January

Further snow showers will affect parts of Scotland and Northern Ireland from Saturday afternoon and through Sunday leading to some locally large accumulations. These will be associated with strong winds so drifting and temporary blizzard conditions are likely.

The public should be aware of the potential for disruption from these conditions. This alert is likely to be updated in the coming days.

YELLOW WARNING OF SNOW for northern Scotland, Northern Ireland and both western and eastern coastal zones.

Updated 13:22 on Wednesday 28th January.

Valid from: 0015 on Sunday 1st February

To: 2345 on Sunday 1st February

Further snow showers will affect parts of Scotland and Northern Ireland on Sunday leading to some locally large accumulations and the showers may spread along eastern and western coasts of England and Wales. The showers will be associated with strong winds so drifting and temporary blizzard conditions are possible as well as icy stretches. The public should be aware of the potential for disruption from these conditions. This alert is likely to be updated in the coming days.

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.

Wednesday 28 January

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 26 Ionawr Cyhoeddwyd am 10:00

Rhagolwg Misol

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

Crynodeb
A cold spell on the horizon.

Last week brought some of the coldest weather the UK has seen for some time. With the winter of 2013/2014 being the 5th mildest winter on record (and records began back in 1910!), it's not that surprising that many areas of the UK saw their coldest nights since way back in March 2013. Temperatures dipped to -14 Celsius on Monday across the snow fields of the Highlands of Scotland, and -9 across western Berkshire on Friday morning.

The weekend saw the return of some milder conditions from the west though, and as we head into the start of this week, it looks like temperatures will stay around the average for late January, with some spells of wet and windy weather at times. By late week though, strong northwesterly winds look set to usher in some rather cold weather that will likely last for several days.

Beyond that, a spell of quietr but still rather cold weather is currently thought most likley. A return to broadly westerly winds driving a succession of Atlantic weather systems across the UK is then anticpated as we head into mid-february.

Read on to find out the details...

Llun 26 Ionawr—Sul 1 Chwefror
Breezy and damp giving way to cold and very windy!

The last week of January will get off to a breezy and damp start as weather fronts and some relatively mild Atlantic air clear away into the continent. This process should leave the remainder of Monday as a fairly dry and bright day for most, save for a few wintry showers that will affect the far northwest of Scotland at times. Conditions will be a little chilly overnight into Tuesday with perhaps a slight frost for rural areas, but during Tuesday another fairly weak Atlantic weather system will be ushered in by brisk westerly winds to bring cloudy, milder conditions with some further patchy rain, chiefly for western hills of the UK.

Cloudy, wet and windy weather is likely to be the order of the day on Wednesday with further Atlantic weather fronts moving in from the west.

By late Wednesday though, the UK weather looks as if it will take on a much colder and windier theme, with strong to gale force northwesterly winds bringing cold air across the UK, and the risk of some periods of snowfall, particularly for Scotland, Northern Ireland and northern areas of England, but possible just about anywhere for a time. There will also likely be an increase in overnight frost risk and icy patches as we move through the remainder of the week and into the weekend. February looks like it will get off to a very cold and windy start!

Llun 2 Chwefror—Sul 8 Chwefror
Cold through the first week of February.

The cold and strong northwesterly winds that developed towards the end of January look likely to continue through the first week of February, with many areas seeing strong to gale force winds at times, particularly in the north, with even the risk of severe gales around some exposed coastlines of the north and west. Low pressure systems may also be picked up in the northwesterly wind and be driven across the UK, bringing the threat of some spells of snowfall.

By the end of the period, most of the forecasting computer models suggest that an area of high pressure, initially anchored over the mid-Atlantic, will drift eastwards to be positioned over the UK. This process will likely result in a continuation of the cold theme and the associated risk of frosty nights, but the weather is likely to become significantly drier and less windy. Indeed, freezing overnight fog patches are also a likely issue as we head towards the end of first week of the month.

Llun 9 Chwefror—Sul 22 Chwefror
Returning to a changeable theme.

At the time of writing, the majority of the medium to long range forecasting computer models are suggesting that this period will begin on a changeable note, with a swift return to Atlantic lows crossing the country from the west (a very familiar theme so far this winter of course!). At this range, it is difficult to assign any specific details to the forecast regarding such features. However, it looks most likely that all areas of the UK will experience some wet and windy intervals, with further cold incursions of air from the north or northwest from time to time.

We await further forecast information with interest!

Wythnos nesaf

Will winter bow out on a cold or mild note? Be sure to get the up-to-date medium range forecast details next week.

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 Chwefror

Crynodeb

Mercher 28 Ionawr Cyhoeddwyd am 15:37

Crynodeb

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

Cold with snow showers, heaviest in northwest. Frost overnight. Windy.
This Evening and Tonight

It will be a windy night with frequent snow showers, locally thundery, across northern and northwestern parts. Scattered wintry showers elsewhere, these mainly in west. Drier and clearer conditions in the southeast, this will allow a frost to develop.

Thursday

Another cold day with sunny spells, sleet and snow showers. However, across southern parts snow primarily falling over hills. Strong winds, mainly in the west, will accentuate the cold feel.

Outlook for Friday to Sunday

Sunshine and showers on Friday, wintry over hills. Thereafter, colder northerly winds will bring snow showers to northern parts and windward coasts, with drier conditions further inland.

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Rhagolwg UK Diweddarwyd 19:05, Mercher 28 Ion Mae’r fideo yma ar gael yn Saesneg yn unig.