Wind and rainfall data 27 December 2013

27 12 2013

As forecast, a deep area of low pressure developed over the Atlantic Ocean in the early hours of Friday morning bringing with it a further spell of wet and very windy weather across the UK as it tracked northeastwards, crossing northwest Scotland.

Below you can see the highest gusts of wind and rainfall totals recorded at Met Office observing sites from midnight to 2.30pm on 27 December.

Maximum gust speeds:

Site Area Elevation (m) Max gust speed (mph)
Aberdaron Gwynedd 95 102
Capel Curig Gwynedd 216 87
Mumbles Head West Glamorgan 43 85
St Bees Head Cumbria 124 85
Inverbervie Kincardineshire 134 81
Valley Gwynedd 10 81
Lake Vyrnwy Powys 360 78
Mona Anglesey 60 78
Needles Old Battery Isle of Wight 80 78
Dundrennan Kirkcudbrightshire 113 77
Pembry Sands Dyfed 3 76

Rainfall totals:

Site Area Rainfall (mm)
Tulloch Bridge Inverness-shire 38
Tyndrum Perthshire 37.8
Charterhouse Roxburghshire 37.8
Kiedler Castle Northumberland 33.2
Achnagart Ross and Cromarty 32.8
Redesdale Camp Northumberland 28.6
Cluanie Inn Ross and Cromarty 26.2
Eskdalemuir Dumfriesshire 24.2
Dalwhinnie Inverness-shire 24.2
Newton Rigg Cumbria 22
Banagher, Caugh Hill Londonderry 19.4

Winds will slowly ease from tonight and we are expecting a brighter and less windy interlude over the course of Saturday and for most of Sunday with overnight frosts and sunny spells and a wintry mix of showers.

Another active atlantic frontal system is expected to swing eastwards across the country on Sunday night and Monday morning. A combination of strobng winds and moist air has the   potential to give locally significant amounts of rain which could cause the risk of further flooding.  The wind and rain are expected to clear eastward on Monday morning.

During this period of unsettled weather, people are advised to stay up to date with the latest Met Office forecasts and National Severe Weather Warnings and find out what to do in severe weather so they can plan ahead for the weather in store and make the most of the festive season. We would also encourage you to stay up to date with the latest news on flooding by checking the Environment Agency’s website for the latest flood alerts and warnings.

 





Stormy weather in the Mediterranean

15 11 2013

The central and western Mediterranean will experience very unsettled conditions through the weekend and next week.

Very heavy rain is expected to affect the northeast of Spain, southern France, the Balearic Isles, Corsica, Sardinia, Italy and the Adriatic facing Balkan nations as the very unsettled conditions move slowly east through the region.

Rainfall totals could be as high as 250mm in places, with a risk of up to 200mm in 24 hours. The average rainfall for November in this region is between 50mm and 100mm.

The rain will be associated with thunderstorms which could also produce hailstorms, very strong gusty winds and the possibility of tornadoes in a few places.

Storms developing over the western Mediterranean

Storms developing over the western Mediterranean

In addition to the rain, very strong winds are expected through the central and western Mediterranean, with widespread gales and a risk of storm force winds for a time. This will lead to rough seas that could pose a threat to shipping in the region.

There is also the risk of strong or gale force southeasterly winds affecting the Adriatic during Tuesday and Wednesday next week. These strong winds, combined with very heavy rainfall across the Venice region over the next few days could bring the risk of flooding in Venice.





Typhoon Haiyan makes landfall over the Philippines

8 11 2013

As predicted Typhoon Haiyan made landfall late yesterday evening (UK time) over the central Philippines.

Typhoon Haiyan will have caused catastrophic damage near the centre of its track through the Philippine islands of Samar, Leyte and Panay. In addition to the strong winds, the storm surge and heavy rain will also have caused major impacts in these regions. The typhoon is now moving out into the South China Sea. Over the next couple of days it is likely to lose some strength before making another landfall in northern parts of Vietnam on Sunday, although is still expected to be a typhoon.

Typhoon Haiyan at 2230 UTC on 07 November 2013 as it made landfall. Image from NOAA.

Typhoon Haiyan at 2230 UTC on 07 November 2013 as it made landfall. Image from NOAA.

At the time of landfall the estimated central pressure of the typhoon was 895 mb and sustained winds averaged over one minute estimated at 195 mph with higher gusts. These estimates are based on well attested satellite techniques, but without observations exactly in the path of the eye of the typhoon it is impossible to confirm their accuracy. However, this is likely to make Haiyan one of the most intense tropical cyclones to make landfall in history.

Forecast track of Typhoon Haiyan from the Japan Meteorological Agency. (http://www.jma.go.jp/en/typh/images/zooml/1330-00.png) NOAA.

Forecast track of Typhoon Haiyan from the Japan Meteorological Agency.

In 1969 Hurricane Camille made landfall over the southern USA with sustained winds near 190 mph and in 1935 a hurricane which passed over the Florida Keys had an observed central pressure of 892 mb.

In terms of all time records, Typhoon Tip in 1979 holds the record for the lowest pressure in a tropical cyclone measured at 870 mb and the strongest wind gust ever recorded in a tropical cyclone was 253 mph in Cyclone Olivia off the north-west coast of Australia in 1996. As things stand these records seem likely to remain for the time being.

Regional warnings for Typhoon Haiyan are produced by the Japanese Meteological Agency (JMA) and the Philippine Atmospheric Geophysical and Astronomical Services Administration (PAGASA). The Met Office routinely supplies predictions of typhoon tracks from its global forecast model to regional meteorological centres worldwide, which are used along with guidance from other models in the production of forecasts and guidance. Met Office model data and guidance is also used by Project NOAH in part for warning the government and the Filipino population.

Met Office StormTracker provides a mapped picture of tropical cyclones around the globe with access to track history and six-day forecast tracks for current tropical cyclones from the Met Office Unified Model and latest observed cloud cover and sea surface temperature. We also provide updates on current tropical storms via @metofficestorms on Twitter.





Heavy rain brings over 100mm of rain to parts of Scotland – rainfall totals across the UK

21 12 2012

There has been some very wet weather across much of the UK seeing well over an inch of rain in the last 24 hours. The wettest place in the UK, in the 48 hours to 6 am this morning is Tyndrum, Perthshire with 102.4 mm of rain, with 94.6 mm of this falling in the last 24 hours.

The wettest place in England was Cardinham, Cornwall with 62.8 mm, in Northern Ireland was Ballypatrick Forest, Antrim with 57.8 mm and in Wales it was Tredegar Park with 54.4 mm of rain.

Although there will continue to be some patchy outbreaks of rain across eastern parts of Scotland today, generally the rain will continue to ease leaving a drier day for many, before more heavy rain pushes into the southwest of England later this evening and across Scotland tomorrow morning.

48 hour UK Rainfall Totals 19 Dec 0600 am - 21 Dec 0600 am
Stations recording more than 40 mm

SITE NAME AREA PRECIP AMOUNT(mm)
TYNDRUM PERTHSHIRE 102.4
CARTERHOUSE ROXBURGHSHIRE 68.2
CARDINHAM, BODMIN CORNWALL 62.8
SHAP CUMBRIA 61.6
BALLYPATRICK FOREST ANTRIM 57.8
PLYMOUTH, MOUNTBATTEN DEVON 55.6
STRATHALLAN AIRFIELD PERTHSHIRE 54.6
TREDEGAR, BRYN BACH PARK GWENT 54.4
PATELEY BRIDGE, RAVENS NEST NORTH YORKSHIRE 53.8
RAVENSWORTH NORTH YORKSHIRE 53.4
BINGLEY WEST YORKSHIRE 51.8
DUNDRENNAN KIRKCUDBRIGHTSHIRE 50.8
THORNEY ISLAND WEST SUSSEX 49.4
SHOREHAM AIRPORT WEST SUSSEX 49.2
USK MONMOUTHSHIRE 48.4
NOTTINGHAM, WATNALL NOTTINGHAMSHIRE 48.4
CARDIFF, BUTE PARK SOUTH GLAMORGAN 48.2
HURN DORSET 47.8
MURLOUGH DOWN 46.6
THREAVE KIRKCUDBRIGHTSHIRE 45.8
WEST FREUGH WIGTOWNSHIRE 45.6
LEUCHARS FIFE 45
MUMBLES HEAD WEST GLAMORGAN 45
CAPEL CURIG GWYNEDD 44.8
RONALDSWAY ISLE OF MAN 44
BRAMHAM WEST YORKSHIRE 43.6
GLASGOW, BISHOPTON RENFREWSHIRE 43
DISHFORTH AIRFIELD NORTH YORKSHIRE 42.8
HAMPSTEAD GREATER LONDON 41.4
SWANAGE DORSET 41
CAMBORNE CORNWALL 40.8
SENNYBRIDGE POWYS 40.8
TRAWSGOED DYFED 40.4

As the wet weather continues into the weekend we have issued a number of severe weather warnings. It is important people are weather aware by staying up to date with these during this period of unsettled weather. Amber warnings mean you need to be prepared for the weather and take steps to change your plans and protect you and your family or community from the impacts of the severe weather based on the forecast from the Met Office. We’d advise people in the areas affected to expect some disruption and take precautions if they are in an area at risk from heavy rain and flooding.





24 – 25 November rainfall update

25 11 2012

Overnight rainfall recorded at Met Office observing stations from 6pm Saturday 24 November to 8am Sunday 25 November:

Station     Amount
Fylingdales, North Yorkshire 36.6 mm
Pershore, Hereford & Worcester 32.6 mm
Sheffield, South Yorkshire 32.6 mm
Gingley-on-the-Hill 31.8 mm
Leek, Staffordshire 31.6 mm
High Mowthorpe, North Yorkshire 31.4 mm
Exeter Airport, Devon 31.2 mm
Dunkeswell, Devon 30.8 mm
Scarborough, North Yorkshire 30.6 mm
Normanby Hall, Humberside 30 mm

Below are the highest rainfall totals recorded at Met Office observing stations between midnight on Saturday and 8am this morning:

Station     Amount
St Mary’s Airport, Isles of Scilly 58.2 mm
Plymouth, Devon 56.8 mm
Cardinham, Cornwall 49.2 mm
Exeter Airport, Devon 48 mm
Dunkeswell, Devon 47.8 mm
Camborne, Cornwall 44.6 mm
Culdrose, Cornwall 41 mm
Pershore, Hereford & Worcester 40.6 mm
Astwood Bank, Hereford & Worcester 39.6 mm
Liscombe, Somerset 38.4 mm

 





Rainfall totals 24 November 2012

24 11 2012

It has been another wet day across much of the southern half of the UK. Here are some rainfall totals between midnight and 9pm from Met Office reporting stations:

Station     Amount
St Mary’s Airport, Isles of Scilly 57 mm
Plymouth, Devon 49.2 mm
Camborne, Cornwall 42.8 mm
Culdrose, Cornwall 40 mm
Cardinham, Cornwall 39.2 mm
Exeter Airport, Devon 31.6 mm
Dunkeswell, Devon 27.6 mm
North Wyke, Devon 26 mm
Bournemouth Airport, Dorset 24 mm
Liscombe, Somerset 21.4 mm

There is more rain to come over the rest of the weekend and into the start of next week.





Last night’s heavy rain

21 11 2012

As forecast, heavy rain fell across parts of southern and southwestern Britain last night.

Here are some rainfall totals between midnight and 8am from Met Office reporting stations:

Station     Amount
Exeter Airport, Devon 39.2 mm
Dunkeswell, Devon 35.6 mm
Okehampton, Devon 33.8 mm
North Wyke, Devon 32.6 mm
Liscome, Somerset 23 mm
Pembrey Sands, Dyfed 22.8 mm
Mumbles Head, West Glamorgan 21.2 mm
Libanus, Powys 20.8 mm
Yeovilton, Somerset 20.4 mm
Cardiff, South Glamorgan 20.2 mm

More heavy rain, and strong to gale force winds are expected across the UK over the next few days.





What’s bringing the stormy weather to the UK?

24 09 2012

The UK has seen some very wet and windy weather since the early hours of Sunday morning and that is set to continue in places for the next couple of days – but what has brought these disruptive conditions?

As is the norm, a low pressure which moved in from the Atlantic is to blame, bringing bands of heavy rain and strong winds (as you can see from the tightly packed isobars on the image below).

Forecast synoptic chart for 12:00 on Tuesday 25 September showing the low pressure over the UK.

Despite some reports to the contrary, this low is not what’s left of tropical storm Nadine, but is a completely separate entity – the remnants of Nadine are currently sitting close to the Azores far to the south of the UK.

Some warm tropical air dragged over by Nadine was sucked up into the low pressure, however, giving it some extra energy – essentially increasing its potential for strong winds and rain.

This isn’t unusual though, virtually every weather system we see will have had some input of sub-tropical air during its evolution.

There are two more notable features of this low pressure, however. Firstly, it has remained unusually active as it sits over the UK, leading to the strong winds and heavy rain.

This is due to the fact that, as the low pressure system moved north across the UK, it has also pulled in cooler polar air from the north.  This cold air has come up against the warm sub-tropical air, re-invigorating the depression and allowing it to continue to deepen over the UK.

Secondly this low pressure is lingering for longer than we would often see. The reason for this is down to the position of the jet stream, a narrow band of fast moving winds high up in the atmosphere which ‘steers’ weather systems.

Normally the jet stream runs fairly directly from east to west and pushes weather systems through quite quickly. Similar to earlier this year, the steering flow of the jet stream is currently in a meandering mood – looking much like a river, curving north and south as it heads west across the Atlantic (we call this a meridional flow, with the more linear west to east flow being called a zonal flow).

When it meanders, weather systems can get stuck in the ‘peaks and troughs’ it creates – so they get stalled in one spot rather than moving on. The below picture of the jet stream as at 12:00 today shows with the steering flow of the jet over France and the UK in the resulting trough.

The weather system will move on during the day on Wednesday, but that still means the UK will have had three days of unsettled weather.

Like our weather, the jet stream can change rapidly and it’s difficult to forecast precisely what it will do for more than a few days ahead – so there’s no reason to expect it to continue to behave in this way and there’s plenty still to play for in terms of our autumn weather.

The low pressure system that is affecting the UK is unusually deep for September, with the lowest air pressure recorded so far being 973mbs. To find a similarly intense low pressure system in September you need to go back to 1981, when pressures below 970mb were reported over a period of 24 hours. Like this week’s, this low pressure system brought unsettled weather as it crossed the British Isles – starting in the Isle of Man and tracking east and then north to cover Cumbria, Northumberland, eastern Scotland, Orkney and Shetland. There have been other times when pressures as low as 970mb were recorded in some parts of the British Isles in September, such as in the Isles of Scilly in 1995 and others across the far north or west of Scotland or Northern Ireland, however none were as widespread as the low that pushed across the UK in 1981.





Heaviest rain moves away after wet day in South West

7 07 2012

It has been another very wet day across parts of the UK, resulting in widespread flooding across parts of the south west of England. Severe Flood Warnings were issued by the Environment Agency for several rivers through the day. This followed the Met Office issuing a Red Severe Weather Warning on Friday evening  for heavy rain in parts of south west England.

The heavy rain that had affected parts of the north Midland and northern England on Friday pushed further north bringing heavy rain to parts of the far north of England and southern and central Scotland.

The table below shows the amount of rain that fell between 7.00 pm on Friday and 4.00 pm on Saturday.

UK RAINFALL 06 July 7.00 pm – 07 July 4.00 pm

SITE NAME

AREA

RAINFALL        AMOUNT ( MM)

DUNKESWELL AERODROME

DEVON

56.2

ISLE OF PORTLAND

DORSET

52.6

NETTLECOMBE, BIRDS HILL

SOMERSET

46.8

EXETER AIRPORT

DEVON

44.8

EDINBURGH, ROYAL BOTANIC GARDEN

MIDLOTHIAN

42.8

LISCOMBE

SOMERSET

40

CHARTERHALL

BERWICKSHIRE

38.8

CAMBORNE

CORNWALL

37.8

PLYMOUTH, MOUNTBATTEN

DEVON

36.6

HURN

DORSET

35.6

WIGHT: ST CATHERINES POINT

ISLE OF WIGHT

34.4

ST ATHAN

S. GLAMORGAN

33.8

CULDROSE

CORNWALL

31.8

SWANAGE

DORSET

30

CARDINHAM, BODMIN

CORNWALL

29.6

YEOVILTON

SOMERSET

28.4

STORMONT CASTLE

DOWN

26

NORTH WYKE

DEVON

24.6

SAUGHALL

AYRSHIRE

23.8

HELENS BAY

DOWN

23.8

 

The forecast for the rest of tonight is for outbreaks of rain to continue in both far northern and southeastern parts of the UK. Showers in many other areas should die away, with western parts in particular becoming largely dry. Some eastern and central parts may continue to see isolated heavy showers. The forecast for the rest of tonight is for outbreaks of rain to continue in both far northern and southeastern parts of the UK. Showers in many other areas should die away, with western parts in particular becoming largely dry. Some eastern and central parts may continue to see isolated heavy showers.





Heavy rainfall across parts of the UK

23 06 2012

The past two days have seen some exceptional rainfall across the UK, with the heaviest and most persistent rain falling in the North West of England, parts of Northern Ireland and parts of southern Scotland.

Across this area there have been fairly widespread rainfall totals of about 25-50mm of rain in the past 24 hours – from 10am yesterday (22 June) to 10am this morning.

However, some spots saw even more rain in the same period. Here are the wettest places in the past 24 hours:

Blencathra, Cumbria – 93.8mm

Keswick, Cumbria – 88.6mm

Stonyhurst, Lancashire – 74.4mm

Levens Hall, Cumbria – 58.2mm

Morecambe, Lancashire – 57mm

Walney Island, Cumbria – 55.8mm

Preston, Lancashire – 54.8mm

Myerscough, Lancashire – 52.2mm

Bingley, West Yorkshire – 50.2mm

This is in line with the yellow and amber Severe Weather Warnings issued by the Met Office for yesterday’s rain, which forecast 25-50mm of rain across a wide area and up to 100mm possible in some spots.

Rainfall has eased this morning, however heavy rain is expected to sweep in across the UK later this evening and into tomorrow morning and the Met Office has issued further weather warnings.

You can stay up to date with the latest situation by looking at the warnings pages on our website and by staying up to date with our forecasts.

Later on Sunday the weather is expected to improve, giving way to a drier and brighter start to the week with sunny spells and improving temperatures.








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