26/08/2026
⚠️🟡 WEATHER WARNING ISSUED/UPDATED 🟡⚠️
📌 All Wales - Blaenau Gwent, Bridgend, Caerphilly, Cardiff, Carmarthenshire, Ceredigion, Conwy, Denbighshire, Flintshire, Gwynedd, Isle of Anglesey, Merthyr Tydfil, Monmouthshire, Neath Port Talbot, Newport, Pembrokeshire, Powys, Rhondda Cynon Taf, Swansea, Torfaen, Vale of Glamorgan, Wrexham
🟡 YELLOW Warning: Thunderstorms
🗓️ 27/08/2026
⏰ 05:00 - 22:00
⚠️ Matrix: Low Likelihood, Medium Impact
ℹ️ A broad band of thunderstorms and heavy rain will move north across England and Wales on Thursday, perhaps becoming slow moving in the afternoon and evening. Accumulations of 20-30mm in an hour is possible locally, while 30-40mm can be expected fairly widely and up to 50mm in a 12 hour period in places. There is a small chance that some places may see more than 50mm in three hours and more than 75mm through 12 hours, especially over east facing high ground. Lightning and hail of 1-2cm will also be hazards.
🌊 We’re asking residents to prepare for flooding as a precautionary measure - this is an unofficial warning from SARS Cymru to residents. Due to dry land, significant rainfall in a short period will result in localised flooding.
🚘 If travelling tonight (26/08) and tomorrow (27/08), allow extra travel time - Remember, wipers on? Lights on. Keep your distance from the vehicle in front.
✅ We’re currently on the border of Ceredigion & Pembrokeshire - we can see the storm front from here with the occasional flashes.
⚠️ Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to train and bus services
⚠️ Spray and sudden flooding could lead to difficult driving conditions and some road closures
⚠️ Some communities might become cut off if roads flood
⚠️ Flooding of homes and businesses could happen quickly, with damage to some buildings from floodwater, lightning strikes
⚠️ Power cuts might occur and other services to some homes and businesses could be lost
ℹ️ Once again, it is much better to be safe than sorry. If you’re in a high risk flood area, please prepare.
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