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Disathairne 19 An Lùnasdal Air fhoillseachadh aig 00:21 uairean

Rabhaidhean airson an RA

Rabhadh aimsir

Bho Oifis na Sìde

Chan eil seo ri fhaighinn ach ann am Beurla a-mhàin

Saturday 19 August

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

Rabhadh Tuil

Bho Buidheann na h-Àrainneachd no SEPA ann an Alba agus Natural Resources Wales sa Chuimrigh

Chan eil seo ri fhaighinn ach ann am Beurla a-mhàin

Saturday 19 August

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

Mu Rabhaidhean Aimsir Oifis na Sìde

Bidh Oifis ns Sìde a’ toirt rabhadh dhan phoball agus na seirbheisean èiginn mu fhìor dhroch aimsir no aimsir chunnartach a dh’fhaodadh troimhe-a-chèile adhbharachadh no a bhith cunnartach do bheatha tron National Severe Weather Warning Service (NSWWS).

Sgaoilidh Oifis na Sìde rabhaidhean mu uisge, sneachda, gaoth, ceò is deigh. Tha dath nan rabhaidhean a rèir dè cho coltach is a tha e gun tig an tachartas gu buil agus a bhuaidh a dh'fhaodadh a bhith aige.

Airson tuilleadh fiosrachaidh, faic Iùl Rabhaidhean Aimsir Oifis na Sìde. (Ann am Beurla)

Mu Rabhaidhean Tuil

Tha rabhaidhean tuil air an gairm le Buidheann na h-Àrainneachd, Buidheann Dìon Àrainneachd na h-Alba agus Natural Resources Wales, agus air an cur gu Ionad na h-Aimsir aig a' BhBC. Tha sinne an uair sin a' sgaoileadh geàrr-chunntas de na rabhaidhean stèidhichte air an fhiosrachadh as ùire a tha ri fhaighinn. Nuair a tha rabhaidhean mu dhroch thuiltean ann, thèid iad cuideachd an craoladh air an telebhisean.

Faigh a-mach tuilleadh mu Rabhaidhean Tuil

Tha grunn dhòighean ann airson faighinn a-mach a bheil cunnart tuil anns an sgìre agad. Tha Buidheann na h-Àrainneachd, Buidheann Dìon Àrainneachd na h-Alba agus Natural Resources Wales ag ùrachadh nan rabhaidhean aca 24 uair gach latha tro àireamh Floodline.

Floodline - 0345 988 1188

Sealladh mìosail

Diluain 14 An Lùnasdal Air fhoillseachadh aig 10:00 uairean

Sealladh mìosail

Chan eil seo ri fhaighinn ach ann am Beurla a-mhàin

Geàrr-chunntas
Still no sign of any prolonged warmth!

If your preference is towards hotter and drier weather, you will doubtless be somewhat disappointed by recent meteorological proceedings across the UK! August has thus far been rather cool and unsettled in the main. Last week brought a prolonged spell of heavy rain for large parts of eastern and southern England. In particular, some areas of Lincolnshire received well in excess of 2 inches of rain in a 36 hour period through last Tuesday and Wednesday. In stark contrast, and at the same time, western Scotland saw plenty of sunshine and highs of 21 Celsius. In fact, throughout last week, we saw a good deal of day to day change in weather conditions across the UK, with a slightly cooler than average feel, and this theme will continue as we move further into August and the start of September.

Read on to find out the details...

Diluain 14 An Lùnasdal—Didòmhnaich 20 An Lùnasdal
Sunshine and showers, turning cooler later.

After a couple of cool nights through the course of the last weekend, the working week will get off to a similarly clear and chilly start across the extreme east of the UK. Further west though, a low pressures system and its attendant weather fronts will bring outbreaks of often heavy rain, particularly for Northern Ireland, southwest Scotland and later Wales. Many central and eastern areas will stay dry with hazy spells of sunshine through most of Monday though.

Through Monday night into Tuesday, the same area of rain will gradually traverse east, giving a cloudy and wet start to Tuesday in the east, and a brighter start across western areas of the UK. The rain in the east should clear into he North Sea fairly readily though, leaving a theme of sunshine and heavy, thundery showers in place for the rest of the day.

Wednesday will most likely be a dry and bright day for all, following another relatively chilly start. Indeed, despite the sunny spells, temperatures will only just about peak at average across the UK, although conditions should still feel relatively fine in the sunnier intervals.

Overnight into Thursday will bring a further weather system in from the Atlantic, in association with an Atlantic low pressure system. The rain will clear to the east early on Thursday, leaving a legacy of sunshine, heavy thundery showers and a slightly cool feel will follow in its wake. Winds will tend to strengthen across northwestern areas of the UK too.

As we progress through the end of this week, it looks like the low pressure system that arrived close to northwestern regions on Thursday will edge away east, perhaps allowing a more settled start the weekend. At time of writing, most of the forecasting tools at our disposal are indicating that a further Atlantic low will move in to northwestern areas again to bring spells of showery weather, but there are signs that southern and eastern parts of the UK could stay drier and brighter for longer.

Diluain 21 An Lùnasdal—Didòmhnaich 27 An Lùnasdal
Events in the western Atlantic affect our forecast

It should be noted that this forecast period is beset with an unusual level of uncertainty. At time of writing, the overwhelming majority of forecast solutions offered by a range of computer models suggest that a relatively deep area of low pressure will be positioned just to the northwest of the UK. Such an eventuality would mean that northwestern regions of the UK would again be under threat of further showers or longer spells of rain, relatively low temperatures for the time of year and strong west to southwesterly winds. Conversely, such a synoptic pattern would mean that southern England will most likely enjoy the best of the weather, with lengthy dry spells and temperatures edging up into the mid-twenties.

As we move through the period, most models suggest a continuation of the theme of low pressure to the north of the UK, with pressure remaining higher to the south, which will translate to weather conditions in the UK being roughly in line with the themes mentioned above.

The source of the uncertainty in forecast details throughout this period lies in the potential for significant tropical storm activity that is anticipated across the warm waters of the Caribbean and western Atlantic. This factor may at first seem rather inconsequential to the weather closer to our shores. It should be noted though that such tropical disturbances can inject a good deal of moisture and energy into the prevailing Atlantic synoptic pattern. The knock on effect is that small perturbations can form in the Atlantic jet stream, which are often missed by the forecasting models. These perturbations can have a large effect on the track of any Atlantic lows that pass close to or over the UK. As a consequence, there is a unusually low level of confidence for the forecast details for this period. Stay in touch with the BBC weather team to find out how the forecast develops over the coming days!

Diluain 28 An Lùnasdal—Didòmhnaich 10 An t-Sultain
Uncertainty continues into climatological autumn

The relatively high level of uncertainty in the forecast details described in the previous section unfortunately continue to be an issue throughout the remainder of August and into the first week of September, which is the start of the climatological autumn. At time of writing, the most likely scenario is that a strong Atlantic jet stream will continue to push weather systems in from the west to bring spells of rain, followed by intervals of sunshine and showers. Models continue to hint that high pressure will on occasion become established across the the southern half the UK, meaning that lengthier dry spells and slightly warmer than average conditions will most likely prevail across southern and eastern England, and perhaps southern areas of Wales at times.

An ath sheachdain

With summer slowly coming to an end, and at this stage no real sign of any extended periods of hot weather, can we perhaps look into September and hope that early autumn will bring us a warmer spell? Stay across the latest developments in the longer term forecast here at BBC Weather!

Tuairmse aimsir mìosail
Tha e doirbh fiù 's don neach as eòlaiche tuairmse a thoirt air an aimsir barrachd air seachdain air thoiseach. Tha modailean iomadh-fhillte bho Oifis na Sìde agus bho Ionad Eòrpach airson Tuairmsean Aimsir Meadhan-ùineil (ECMWF) air an ruith airson a' mhìos (agus an ràith) air thoiseach, a' togail dealbh de aimsirean eadar-dhealaichte a dh'fhaodadh a bhith buailteach buaidh a thoirt air an RA.

An ath ùrachadh aig 10:00 uairean, Diluain 21 An Lùnasdal

Geàrr-chunntas

Disathairne 19 An Lùnasdal Air fhoillseachadh aig 15:57 uairean

Geàrr-chunntas

Chan eil seo ri fhaighinn ach ann am Beurla a-mhàin

Mostly dry with clear spells tonight. Turning chilly in places.
This Evening and Tonight

Largely dry overnight with clear spells and turning chilly, particularly in rural spots. Some showers continuing in northern Scotland through the night. Meanwhile, cloud and outbreaks of patchy light rain and drizzle may reach the far southwest by dawn.

Sunday

Cloud, rain and drizzle spreading across southern and western parts of Britain, locally heavy bursts possible. Dry elsewhere with some pleasantly warm sunshine, but turning increasingly cloudy later.

Outlook for Monday to Wednesday

Outbreaks of rain in the northwest, some heavy with thundery downpours possible. Becoming largely dry, very warm and feeling humid in the south, with increasing amounts of sunshine.

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Air ùrachadh aig 17:54 BST, Disathairne 19 LùnBhidiothan aimsir ann am Beurla a-mhàin