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Met Office weather warning for risk of heavy downpours

The Met Office has issued a yellow weather warning for the risk of heavy and thundery downpours in the Anglia region on Saturday afternoon.

Area covered by a Met Office yellow weather warning on Saturday 11 June 2016. Credit: Met Office

The weather warning is in force from 11am until 8pm on Saturday 11 June 2016

The Met Office says scattered, heavy downpours will develop today across England and Wales, turning thundery in places.

It says that although many places will miss the worst, (some even staying dry) there is the risk of localised surface water flooding and disruption to travel.

"A moist, unstable air mass across most of England and Wales will again lead to the development of some heavy showers and localised thunderstorms.

"15-25 mm of rain could fall locally within an hour, with 30 to 40 mm possible within 3 or 4 hours.

"These amounts could generate some surface water flooding, especially if they affect urban areas."

– Met Office Chief Forecaster's assessment

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Met Office weather warning for heavy rain in Essex and Suffolk

The area covered by a yellow weather warning for heavy rain. Credit: Met Office

The Met Office has issued a yellow weather warning for heavy rain in parts of Suffolk and Essex.

It's valid until 5pm on Bank Holiday Monday.

The Met Offices says further areas of heavy rain or thundery showers are likely to affect parts of southeastern England and East Anglia at times on Bank Holiday Monday.

The main risk periods would seem to be before dawn and again during the middle of the day and into the afternoon. The evening should see a slow transition to drier conditions from the west.

"Parts of East Anglia and southeast England will still be affected by a warm, humid and unstable airmass during much of Monday, which leaves the opportunity for thundery downpours to spread from Northern France.

As in many such cases, only a minority of places will see the heaviest rain, but there is a chance that some locations could see 20 to 25 mm of rain in an hour and perhaps 40 mm in a few hours."

– Met Office Chief Forecaster's assessment

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Viewer pictures: Thunderstorms in the East

Lightning striking over Happisburgh Lighthouse in Norfolk Credit: Russell Waite

So the early hours of Saturday 4 July saw widespread electrical storms across East Anglia.

It seemed some of you took a few shots of the storms.

Credit: Russell Waite
This was taken by 12 year old Abigail from Luton in Bedfordshire Credit: Abigail Lacey
Credit: Philip Thulbourn
Gavin took this from his bedroom window from Bury St Edmunds Credit: Gavin C
This was taken in Bury St Edmunds as the storm moved away Credit: Simmy Knight
Lightning over the new cap at St Helena Windmill in Horsford Credit: Melanie Smith

Thunderstorms produce a fortnight's worth of rain

Lightning captured in the village of Croydon between Cambridge and Biggleswade. Credit: Bob Burling

With every good heatwave in the British summer there is nearly always a spectacular thunderstorm or two.

The early hours of Saturday 4 July saw widespread electrical storms across East Anglia.

At Hitchin in Hertfordshire there was 35 mm of rain, which is more than normally falls in two weeks in July.

The overnight deluge make it the wettest day of the year so far in the East of England.

Rainfall totals in the Anglia region in the 12 hours to 10am on Saturday

  • 21.4 mm in Bedford
  • 21.2 mm in Woburn, Bedfordshire
  • 17.6 mm in Monks Wood near Sawtry, Cambridgeshire
  • 15.0 mm in Harpenden, Hertfordshire
  • 13.6 mm in Holbeach, Lincolnshire
  • 11.8 mm in Wattisham, Suffolk
  • 8.0 mm in Writtle, Essex
  • 7.2 mm in Cambridge
  • 3.8 mm in Norwich

Met Office weather warning for heavy rain on Friday night

The Met Office has issued a yellow weather warning for the risk of heavy rain, hail and lightning on Friday night into Saturday.

There is a chance of some very localised significant disruption, mainly from surface water flooding. Lightning and hail could also cause some impacts.

The warning is valid from noon on Friday 12 June until 7am on Saturday 13 June 2015

Area covered by a Met Office yellow weather warning for heavy rain on Friday night into Saturday. Credit: Met Office

"An area of warm, very humid air is expected to move northwards across France into southern Britain later on Thursday and into Friday. Whilst isolated thunderstorms are possible from Thursday, these become more likely and potentially more severe by Friday afternoon, with the potential for 20 to 30 mm falling within an hour or so, probably on a very localised basis.

"Indications are that a more organised band of heavy rain and thunderstorms will follow by Friday evening and overnight into Saturday, bringing 25 to 50 mm of rain more widely, again with the potential for some very high short-period totals."

– Met Office Chief Forecaster's Assessment

The Met Office says given the complexity of the developments leading up to this event, ideas on areas at greatest risk of heavy rainfall and severe thunderstorms may well change, and this warning will be updated accordingly.

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