A wet start to August

15 08 2014

The UK has already seen nearly its entire ‘normal’ rainfall for August in the first half of the month.

Figures up to the 13th of August show there has been 86.1mm of rain so far in the UK, just short of the 89.5mm long-term (1981-2010) average.

Looking at individual countries, Scotland has already seen more than its full-month average with 121.4mm of rain so far compared to the average of 116.7mm. The Inverness and Moray areas have been particularly wet, with significant flooding from ex-hurricane Bertha on 10 to 11 August.

Rainfall for England and Northern Ireland so far is just under the full-month average, while Wales has been the driest relatively speaking – with 83.2mm of rain making up 77% of its full-month average. Normally at this stage you would expect about 42% of the average to have fallen.

With regards to temperatures and sunshine, the month has been much closer to average so far.

The UK mean temperature is currently 15.2C, which is 0.3C above the full-month average.

UK sunshine hours are at 77.8 hours, which is 48% of the full-month average – so just ahead of where we’d expect after 13 days of the month.

While these figures are interesting, they don’t tell us where the month will end up overall – we’ll have to wait until the full-month figures are in before deciding where this August fits in to the records.

As we head in to next week there should be a good deal of drier weather but with northerly winds bringing in cooler air it will feel colder than of late, especially at night.

This will feel noticeably cool in the wind, so people heading out in the evening may want to take a few extra layers.

Mean temperature Sunshine Rainfall
1 – 13 August 2014 Actual

Diff from 81-10 average

Actual % of 81-10 average Actual % of 81-10 average
Celsius Celsius hours % mm %
UK 15.2 0.3 77.8 48 86.1 96
England 16.5 0.4 91.8 50 64.7 93
Wales 15.3 0.3 85.1 51 83.2 77
Scotland 13.2 0.2 55.3 41 121.4 104
N Ireland 14.5 0.2 61.9 46 92.7 95




Cyclone Quartet Straddle the Pacific Ocean

8 08 2014

In the last few days a quartet of tropical cyclones have been active across the Pacific Ocean. For a period of time all four were simultaneously of hurricane intensity (winds greater than 74 mph). This is the first time this has happened in the Pacific Ocean for 12 years. Here we take a look at each of the storms and their likely impact.

Typhoons Halong and Genevieve and Hurricanes Iselle and Julio seen on 7 August 2014 Original images courtesy of University of Wisconsin

Typhoons Halong and Genevieve and Hurricanes Iselle and Julio seen on 7 August 2014
Original images courtesy of University of Wisconsin

Typhoon Halong formed near the US island of Guam and has been active in the west Pacific for over 10 days. It is now heading north towards south-western Japan and is set to bring strong winds and heavy rain this weekend to the area only recently affected by Typhoon Neoguri.

Typhoon Genevieve originated in the east Pacific and for a long time was a weak storm, even weakening to a remnant low pressure area at one stage. However, in the central Pacific Genevieve rapidly strengthened as it traversed an area of warm waters and gained hurricane status. As it crossed the International Dateline Hurricane Genevieve became Typhoon Genevieve. There is no difference between hurricanes and typhoons except that the former is used to describe tropical cyclones east of the Dateline and the latter to the west of the Dateline. Genevieve looks set to end its life as a tropical cyclone in mid-ocean well away from land.

Hurricane Genevieve as it crossed the International dateline and became a typhoon on 7 August 2014.  Image courtesy of US Naval Research Laboratory.

Hurricane Genevieve as it crossed the International dateline and became a typhoon on 7 August 2014.
Image courtesy of US Naval Research Laboratory.

Hurricane Iselle formed in the east Pacific just over a week ago. Iselle was downgraded to a tropical storm just as it made landfall over Hawaii today, but is still bringing strong winds, surf and heavy rain. Tropical storm or hurricane strikes directly over Hawaii are very rare. The last hurricane to make landfall over Hawaii was Iniki in 1992.

Rainfall radar showing Tropical Storm Iselle approaching Hawaii 8 August 2014. Image courtesy of NOAA

Rainfall radar showing Tropical Storm Iselle approaching Hawaii 8 August 2014.
Image courtesy of NOAA

Hurricane Julio is following hard on the heels of Hurricane Iselle in the east Pacific and has become a ‘major hurricane’ with winds in excess of 115 mph.

 

Julio is also heading in the direction of Hawaii, but looks likely to track a little further north than Hurricane Iselle. However, the US state could still feel the affects of Julio as it passes by on Sunday.

Official warnings of west Pacific tropical storms are produced by the Japanese Meteorological Agency . Central Pacific warnings are issued by the Central Pacific Hurricane Center and east Pacific warnings by the US National Hurricane Center. The Met Office routinely supplies predictions of cyclone 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 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 global forecast model and latest observed cloud cover and sea surface temperature. We also provide updates on current tropical storms via @metofficestorms on Twitter.





Rain totals for 19th July 2014

20 07 2014

As forecast there were severe thunderstorms across the UK on the 19th July bringing heavy rain and gusty winds. See the tables below for the largest rain totals across the UK.  Gloucestershire recorded the highest rainfall with 66mm between 6am and 6pm yesterday, the counties monthly average rainfall is 60.6mm.

The Heat-health watch put in place in parts of southern and eastern England in conjunction with Public Health England has now been downgraded. Temperatures in parts of the area covered topped 28C during 19 July, see table below.

Today, 20 July, temperatures are expected to reach low to mid 20’s across central, south and south east of England, with London seeing around 27C.  Northern England will reach mid to high teens and Scotland and Northern Ireland mid to low teens.

More thundery downpours are expected to develop today over some eastern and central parts of the UK.  A yellow, be aware, weather warning for rain is in place for the areas likely to be affected. Not everywhere will see a storm but where they do occur, torrential downpours are possible with lightning, hail and strong gusts of wind. The areas most likely to be affected are across eastern and southeastern England.

Many places will have a good deal of fine and very warm weather this working week although there is the risk of some heavy showers in parts of the south and west later in the week.

 

UK MAX TEMPERATURE 19 JULY 2014
TIME SITE NAME AREA MAX TEMP (Celsius)
16:22 London St Jamess Park GREATER LONDON 28.5
15:13 Northolt GREATER LONDON 28.4
15:22 Heathrow GREATER LONDON 28.3
15:59 Santon Downham SUFFOLK 28.3
13:29 Gravesend, Broadness KENT 28.1
16:51 Cambridge NIAB CAMBRIDGESHIRE 27.7
15:49 Marham NORFOLK 27.7
13:55 Hampton W Wks GREATER LONDON 27.6
16:52 Writtle ESSEX 27.6
14:51 Frittenden KENT 27.5

 

 

12hr UK RAINFALL 19 JULY
SITE NAME AREA PRECIP. (MM)
WESTONBIRT GLOUCESTERSHIRE 66.0
PERSHORE COLLEGE HEREFORD & WORCESTER 36.4
PERSHORE HEREFORD & WORCESTER 30.8
NEWPORT (SALOP) SHROPSHIRE 29.4
KEELE STAFFORDSHIRE 28.2
ASTWOOD BANK HEREFORD & WORCESTER 27.6
NOTTINGHAM, WATNALL NOTTINGHAMSHIRE 26.0
LIBANUS POWYS 25.8
NANTWICH, REASEHEATH HALL CHESHIRE 22.6
MARKET BOSWORTH, BOSWORTH PARK LEICESTERSHIRE 22.6




First half of July is… average?

18 07 2014

With the recent run of generally fine, dry and warm weather you’d be forgiven for thinking this July so far would be anything but average – but the statistics tell a different story.

The UK mean temperature for 1-16 of the month is 15C, just 0.1C above average. UK rainfall is perhaps surprisingly close to the average too, with 36.3mm of rain making up 46% of the whole-month average – we’d expect to see about 52% of the average by now.

Sunshine is the only measure which is notably above average, with 111.4 hours for the UK which is about 65% of the whole-month average (again, we’d expect about 52% at this point in the month).

These figures might not fit in with how many have perceived this month so far, which has seen a good deal of dry and fine weather.

One possible reason for this is that UK day-time maximum temperatures have been slightly higher than average (19.7C), while the night-time minimums have been slightly lower than average (10.4C). So we’ve experienced warmer days, and cooler nights, which adds up to a very average mean temperature (which includes day and night-time temperatures).

Another reason for the statistics bucking the expectation is because, with the exception of last year, the preceding few summers have been generally a little disappointing.

While last year’s July was drier than average, five out of the six previous to that were wetter than average and three were cooler than average.

So perhaps we feel that the recent fine and dry weather is more unusual than it really is because of recent history.

Obviously it’s far too early to judge how this July will finish overall, with half of the month still to add in to the statistics.

You can explore all kinds of climate information, including monthly summaries back to 2001, and climate data back to 1910, on our climate pages.

  Mean temperature Sunshine Rainfall
1 – 16 July 2014 ** Actual Diff from 81-10 average Actual % of 81-10 average Actual % of 81-10 average
  degC degC hours % mm %
UK 15.0 0.1 111.4 65 36.3 46
England 16.3 0.2 120.2 62 29.0 46
Wales 14.7 -0.3 110.6 62 29.5 32
Scotland 13.1 0.0 101.1 72 50.0 50
N Ireland 14.5 0.1 88.1 63 36.7 45

** Please note these are half month statistics from 1-16 July. The final figures will change once statistics from the second half of the month are included.





Early figures suggest one of the warmest Junes on record

27 06 2014

Early statistics from the Met Office National Climate Information Centre show that this has been one of the warmest Junes in records dating back to 1910.

Based on figures up until 25 June the mean temperature for the UK for the month is 14.4 °C, making it joint 6th at the moment and more than likely one of the top ten warmest once final figures are in. The warmest June on record is 1976 with 15 °C.

This continues a run of seven months where the UK mean temperature was warmer than average, with all the months from December through to April each being at least 1 °C warmer than the long-term average.

Looking at specific countries it is currently the second warmest June on record in Scotland with 13.2 °C – the warmest being 1940 with 13.5 °C. For England, Wales and Northern Ireland it’s currently the 9th warmest.

Rainfall totals have been below normal as a whole and sunshine totals have been near normal, brightest over south-west England and Wales but duller over Scotland.

  Mean temperature Sunshine Rainfall
1 – 25 June 2014 ** Actual Diff from 81-10 average Actual % of 81-10 average Actual % of 81-10 average
  degC degC hours % mm %
UK 14.4 1.4 161.1 95 45.9 63
England 15.2 1.2 184.3 101 33.0 53
Wales 14.2 1.0 203.1 117 43.9 51
Scotland 13.2 1.9 113.6 76 67.0 75
N Ireland 14.0 1.2 146.8 98 50.5 66

** Please note these are preliminary statistics from 1-25 June. The final figures will change once statistics from the final few days of the month are included.





Rain over the Bank Holiday Weekend, with more to come

27 05 2014

The Bank Holiday weekend saw a good deal of dry and bright weather in places, but there was also heavy rainfall in some spots over the three days with some significant rainfall totals.

Much of England and Wales had a wet Saturday as rain pushed northwestwards with heavy, and thundery showers following.

Sunday brought heavy showery rain to western and northern parts of the UK, with 25 mm of rain falling in three hours around the Edinburgh area.

Heavy rain pushed in from the southeast on Bank Holiday Monday, whilst to the west and north of this there was some sunny weather, but also heavy and thundery showers for Cornwall, Northern Ireland and Scotland.

Here are the highest UK rainfall totals for each of the three days of the Bank Holiday:

 

Rainfall totals from 0900 Saturday 24 May – 0900 Sunday 25 May
Site Area Amount (mm)
Liscombe Somerset 32.2
Usk Monmouthshire 29.0
Tredegar Gwent 23.4
Okehampton Devon 22.5
Waddington Lincolnshire 22.0
Sheffield South Yorkshire 22.0

 

Rainfall totals from 0900 Sunday 25 May – 0900 Monday 26 May
Site Area Amount (mm)
Edinburgh, Gogarbank Midlothian 26.2
Cardinham Cornwall 17.8
Edinburgh, Royal Botanic Garden Midlothian 17.4
Tyndrum Perthshire 17.2
Camborne Cornwall 14.2

 

Rainfall totals from 0900 Monday 26 May – 0900 Tuesday 27 May
Site Area Amount (mm)
Wattisham Suffolk 31.2
Brooms Barn Suffolk 25.4
Cavendish Suffolk 21.8
Charsfield Suffolk 19.2
Cambridge Cambridgeshire 17.0

 

Looking ahead through the rest of this week there is more rain to come, particularly for eastern and northeastern England, while Scotland (especially the north) has the best of the warm, sunny weather.

Suffolk has already seen heavy rainfall through Tuesday morning with over 30 mm of rainfall at Wattisham through the first 9 hours of the day.

This is going to push northwards through Tuesday into Norfolk and Lincolnshire. A Met Office yellow warning has been issued to warn of rainfall amounts reaching around 30mm in some spots which could lead to some localised flooding.

There are also going to be some heavy showers over southern parts of Wales and parts of the West Country.

Wednesday will again be wet for many, especially around northeast England with parts of Yorkshire at risk of over 30 mm, for which another yellow rainfall warning has been issued. With strengthening winds this will make it feel quite unpleasant at times.

More showers or longer spells of rain are expected for Thursday, before things should turn generally drier, brighter and warmer by the weekend.





Balkan flooding

19 05 2014

Over 100mm of rainfall was recorded over Bosnia and Serbia during Wednesday and Thursday last week (14th & 15th May 2014), with media reports of much higher rainfall accumulations in places.

The heavy rainfall was caused by a slow moving area of low pressure through the whole depth of the atmosphere

The subsequent flooding was reported to be the worst in 120 years in Bosnia since records began in 1894. A state of emergency has been declared in 18 towns and cities, including Belgrade. The Serbian Prime Minister declared this the greatest flooding disaster ever, with more than four months worth of rain falling on one day. Rivers across the region are now believed to be at record levels.

The system that caused the heavy rainfall has now moved away eastwards with predominately dry weather expected for the rest of this week. Temperatures are expected to be close to normal for the time of year with relatively light winds.  However the longer range forecast shows the potential for further heavy rainfall next week.

There have been reports in the media that the flooding has sparked a mass evacuation with fears that flooding and mudslides could expose landmines left by the Bosnian war.

River gauges show many of the rivers have peaked, but despite the dry forecast for the next few days there are concerns (from local hydromet departments) that river levels may rise again on Tuesday evening (20th May) and Wednesday morning(21st May) on the River Sava and River Danube.  Further flooding could threaten a major power station on the River Sava.





Spring has sprung

5 03 2014

Warmer, drier weather is on the way for parts of the country.  As we move through the week a north–south divide develops across the UK with Scotland, Northern Ireland, northern England and parts of Wales being changeable and windy. However in the south high pressure will dominate  bringing dry weather for the weekend, with the best of the weather in the Southeast.

Temperatures are expected to reach mid to high teens in the South this weekend (8th – 9th March), while northwest England and Scotland are likely to see spells of strong winds and rain and there is a risk of overnight frosts.

This is in sharp contrast to the record breaking winter we have just experienced.  It was the wettest winter for the UK, England, Wales and Scotland, and the second wettest winter for Northern Ireland in the record series dating from 1910. It was the stormiest UK weather for 20 years with at least 12 major winter storms affecting the UK in two spells from mid-December to early January, and again from late January to mid-February.

For a time early next week the temperatures are expected to return to nearer normal, or slightly above, the average for the time of year (9 °C).  High pressure is again expected to dominate through next week leaving largely settled conditions it should continue to feel “spring like” with some sunshine around and light winds.

When does Spring start?

Meteorologically speaking spring stretches from 1 March to the end of May. Astronomically, spring typically starts on the day of spring equinox, around the 20 March in the Northern Hemisphere.

Weather in spring is often calm and dry with temperatures rising in the day but staying cool at night.





Winter so far – 18th February rainfall update

18 02 2014

As the UK heads into a period of more normal unsettled winter weather weather, the Met Office’s National Climate Information Centre has looked at statistics for this winter so far (from 1 December 2013 to 13 February 2014).

These add to previous facts and figures we put out earlier this month, and show a picture of continuing exceptional rainfall across many areas.

Looking at regions around the UK, these provisional figures show the region of central southern and southeast England has already exceeded its record winter rainfall in the series back to 1910. Rainfall here currently at 459.3mm*, 22mm above the previous record of 437.1mm set in 1915 with two weeks still to go to the end of the season. This winter also currently ranks as the 4th wettest winter (if there is no further rain) for southwest England and south Wales combined and the 3rd wettest for England South.

Both the UK as a whole and Wales are fairly close to exceeding their respective record wettest winter levels in the national series dating back to 1910 (see table below). Average rainfall for the rest of the month could see those records broken.

All countries across the UK have already exceeded their typical average rainfall for the whole winter (according to the 1981-2010 long-term averages). Normally at this stage of the season, you’d expect to have seen only around 80% of that whole season average.

All areas are also on target for a significantly wetter than average winter, with typically around 130-160% of normal rainfall if we get average rainfall for the rest of February.

All countries and areas are also on target for a warmer than average winter.

Current record wettest winters:

Country Year Rainfall Winter 2014 to date*
UK 1995 485.1mm 452.6mm
ENGLAND 1915 392.7mm 345.6mm
WALES 1995 684.1mm 645.1mm
SCOTLAND 1995 649.5mm 590.4mm
NORTHERN IRELAND 1994 489.7mm 386.2mm

*These are provisional figures from 1 December 2013 to 13 February 2014 and could change after final quality control checks on data.





January weather summary

14 02 2014

January saw a succession of weather systems tracking across the UK from the Atlantic which brought high winds, at times gale force, and persistent rain to the country. This extended a sequence of deep lows that began in mid-December. The worst of these were over by the 7th to give some brief respite, but rain continued through the remainder of the month with very few dry days. For the period from 12th December to the end of January some stations in the south of England had recorded over five months worth of rainfall.

The UK mean temperature for January was 4.8 °C, which is 1.1 °C above the 1981-2010 average. The UK overall received 151% of average rainfall making it the third wettest in the series. A broad region from east Devon to Kent and up to the central midlands received well in excess of 200 % and some more localised regions were closer to three times the average. Visit our climate section for a full written summary of the month.

Our infographic and video provide a summary of the weather throughout January:

14_0062-jan-summary-infog








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