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What do the warning colours mean?

Red warning

  • Dangerous weather is expected and, if you have not done so already, you should take action now to keep yourself and others safe from the impact of the severe weather.
  • It is very likely that there will be a risk to life, with substantial disruption to travel, energy supplies and possibly widespread damage to property and infrastructure.

Amber warning

  • There is an increased likelihood of impacts from severe weather, which could potentially disrupt your plans.
  • This means there is the possibility of travel delays, road and rail closures, power cuts and the potential risk to life and property.

Yellow warning

  • Yellow warnings can be issued for a range of weather situations.
  • It is important to read the content of yellow warnings to determine which weather situation is being covered by the warning.

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UK weather warnings

Yellow warning
Thunderstorm
11:00
Sun 12
UTC+1
19:00
Sun 12

Heavy showers and isolated thunderstorms may develop across western Northern Ireland during Sunday day time.

What to Expect

  • Spray and sudden flooding could lead to difficult driving conditions and some road closures
  • There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost
  • There is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater, lightning strikes, hail or strong winds

What should I do?

Further Details

Slow moving, heavy showers with a risk of isolated thunderstorms may develop over the west of Northern Ireland from late on Sunday morning. Many areas will miss the heaviest showers altogether, but a few places could see 30-40 mm in the space of an hour or two, possibly accompanied by some hail. Should they develop, the showers are likely to fade and die out during the evening. What should I do? Consider if your location is at risk of flash flooding. If so, consider preparing a flood plan and an emergency flood kit. Prepare to protect your property and people from injury. Before gusty winds arrive, check to ensure moveable objects or temporary structures are well secured. Items include; bins, garden furniture, trampolines, tents, gazebos, sheds, and fences. Give yourself the best chance of avoiding delays by checking road conditions if driving, or bus and train timetables, amending your travel plans if necessary. People cope better with power cuts when they have prepared for them in advance. It’s easy to do; consider gathering torches and batteries, a mobile phone power pack and other essential items. If you find yourself outside and hear thunder, protect yourself by finding a safe enclosed shelter (such as a car). Do not shelter under or near trees, or other structures which may be struck by lightning. If you are on an elevated area move to lower ground. Be prepared for weather warnings to change quickly: when a weather warning is issued, the Met Office recommends staying up to date with the weather forecast in your area.


Warning impact matrix

This warning has a very low likelihood and a medium impact.

Very
likely
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
to
Unlikely
Very low
impact
to High
impact

Regions and local authorities affected:

Northern Ireland

  • County Armagh
  • County Fermanagh
  • County Londonderry
  • County Tyrone
Yellow warning
Thunderstorm
12:00
Sun 12
UTC+1
22:00
Sun 12

Heavy showers and thunderstorms could lead to some disruption in places, especially to travel. Isolated property flooding is possible.

What to Expect

  • Spray and sudden flooding could lead to difficult driving conditions and some road closures
  • Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to train and bus services
  • There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost
  • There is a small chance of fast flowing or deep floodwater causing danger to life, particularly in places such as road and railway underpasses.
  • There is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater, lightning strikes, hail or strong winds

What should I do?

Further Details

Heavy showers and thunderstorms are likely to break out in the south of this area late Sunday morning and early Sunday afternoon, moving steadily north whilst growing into larger areas of rain before clearing the area. Some intense downpours are possible in a few places, giving up to 30 mm in less than hour and perhaps 40-50 mm over 2 to 3 hours leading to surface water flooding. Hail, frequent lightning strikes and strong wind gusts will be additional localised hazards. What should I do? Consider if your location is at risk of flash flooding. If so, consider preparing a flood plan and an emergency flood kit. Prepare to protect your property and people from injury. Before gusty winds arrive, check to ensure moveable objects or temporary structures are well secured. Items include; bins, garden furniture, trampolines, tents, gazebos, sheds, and fences. Give yourself the best chance of avoiding delays by checking road conditions if driving, or bus and train timetables, amending your travel plans if necessary. People cope better with power cuts when they have prepared for them in advance. It’s easy to do; consider gathering torches and batteries, a mobile phone power pack and other essential items. If you find yourself outside and hear thunder, protect yourself by finding a safe enclosed shelter (such as a car). Do not shelter under or near trees, or other structures which may be struck by lightning. If you are on an elevated area move to lower ground. Be prepared for weather warnings to change quickly: when a weather warning is issued, the Met Office recommends staying up to date with the weather forecast in your area.


Warning impact matrix

This warning has a very low likelihood and a medium impact.

Very
likely
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
to
Unlikely
Very low
impact
to High
impact

Regions and local authorities affected:

East Midlands

  • Derby
  • Derbyshire
  • Leicester
  • Leicestershire
  • Northamptonshire
  • Nottingham
  • Nottinghamshire

London & South East England

  • Buckinghamshire
  • Hampshire
  • Oxfordshire
  • Reading
  • Southampton
  • West Berkshire
  • Windsor and Maidenhead
  • Wokingham

North West England

  • Blackburn with Darwen
  • Blackpool
  • Cheshire East
  • Cheshire West and Chester
  • Cumbria
  • Greater Manchester
  • Halton
  • Lancashire
  • Merseyside
  • Warrington

South West England

  • Bath and North East Somerset
  • Bournemouth Christchurch and Poole
  • Bristol
  • Devon
  • Dorset
  • Gloucestershire
  • North Somerset
  • Somerset
  • South Gloucestershire
  • Swindon
  • Torbay
  • Wiltshire

Wales

  • Blaenau Gwent
  • Bridgend
  • Caerphilly
  • Cardiff
  • Carmarthenshire
  • Ceredigion
  • Conwy
  • Denbighshire
  • Flintshire
  • Gwynedd
  • Isle of Anglesey
  • Merthyr Tydfil
  • Monmouthshire
  • Neath Port Talbot
  • Newport
  • Powys
  • Rhondda Cynon Taf
  • Swansea
  • Torfaen
  • Vale of Glamorgan
  • Wrexham

West Midlands

  • Herefordshire
  • Shropshire
  • Staffordshire
  • Stoke-on-Trent
  • Telford and Wrekin
  • Warwickshire
  • West Midlands Conurbation
  • Worcestershire

Yorkshire & Humber

  • North Yorkshire
  • South Yorkshire
  • West Yorkshire
Warnings are in force for:

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