Yellow warning of thunderstorm affecting Wales

Met Office sent this bulletin at 12-06-2025 10:30 AM BST
 
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Yellow warning for Wales
Thunderstorm
Between 18:00 (UTC+1) on Fri 13 Jun 2025 and 23:59 (UTC+1) on Fri 13 Jun 2025

Headline

Heavy rain and thunderstorms may lead to some disruption on Friday evening

What to expect

  • Spray and sudden flooding could lead to difficult driving conditions and some road closures
  • There is a small chance that some communities become cut off by flooded roads
  • 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 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?

Issued: 10:24 (UTC+1) on Thu 12 Jun 2025

Further Details

Areas of heavy rain and some thunderstorms are likely to move northwards into southwest England and Wales on Friday evening.

Rainfall amounts and thunderstorm activity will vary across the area however there is the potential for 20 mm of rain to fall in an hour and 30-40 mm to fall in 3 hours or less in a few places. As well as this there is a small chance of frequent lightning and hail within the rain area as additional 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.

View full warning details and map view

Regions and local authorities affected

London & South East England

  • Bracknell Forest
  • Hampshire
  • Isle of Wight
  • Oxfordshire
  • Portsmouth
  • Reading
  • Southampton
  • Surrey
  • West Berkshire
  • West Sussex
  • Wokingham

South West England

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

Wales

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

West Midlands

  • Herefordshire
  • Shropshire