Weather Warnings Archive: Friday 18 Jul 2025 10:54 BST - UK

issued by the Metoffice at
   09:54, 18.07.2025

valid from
   04:00, 19.07.2025
until
   11:00, 19.07.2025

Region: London & South East England

Areas of heavy rain with embedded thunderstorms will move northwards during the early hours of Saturday, with torrential downpours in places. Accumulations of 20-40 mm are possible in 1 hour, and where heavy downpours persist then as much as 70-100 mm could accumulate in just a few hours. Significant impacts are possible if this occurs over more urban areas. The more widespread heavy rain should clear to the north during Saturday morning, but additional scattered heavy showers and a few thunderstorms could develop during Saturday afternoon and early evening, this risk covered by the much larger Yellow thunderstorm warning. What Should I Do? Keep yourself and others safe; prepare to avoid travelling by road during potentially dangerous road conditions. If you must travel, ensure you watch for possible danger and drive cautiously. It is not safe to drive, walk or swim through floodwater, avoid it where possible and if you are affected by fast flowing or deep-water call 999, and wait for help. Preparing a flood kit could save you from loss or damage due to flooding to your home or business. Include: insurance and any other important documents; a torch & spare batteries; first aid kit, prescription medicines and supplies for looking after your family members or pets such as warm, waterproof clothes, blankets, food, and water. Being outside in high winds and/or lightning makes you more vulnerable to injury. Stay indoors as much as possible. If outside, try not to walk, or shelter, close to buildings or trees, or other structures which could be struck by lightning. If you hear thunder, and are unable to get to a safe enclosed shelter (such as a car), crouch down in a ball-like position with your head tucked in and hands over your ears making minimal contact with the ground, away from objects that conduct electricity. 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. Consider checking on vulnerable people that you know including older people, those with underlying conditions and those who live alone; they may need support with food and medical supplies. If you are worried about your health or that of somebody you know, ring NHS 111. Stay up to date with the weather forecast for your area and follow advice from emergency services and local authorities.

Torrential rain, with thunderstorms in places, could lead to some significant surface water flooding during Saturday morning

The public is advised to take extra care, further information and advice can be found here: http://www.metoffice.gov.uk/weather/uk/links.html

issued by the Metoffice at
   09:54, 18.07.2025

valid from
   00:00, 19.07.2025
until
   21:00, 19.07.2025

Region: London & South East England

Areas of heavy rain with embedded thunderstorms will move northwestwards across a large swathe of central and eastern England through Friday night into Saturday. Rain will likely be torrential in places, bringing 20-30 mm in less than an hour, with 60-90 mm in 2-3 hours possible in a few places. Whilst more widespread heavy rain will gradually clear northwestwards during Saturday, additional scattered heavy showers and thunderstorms may develop in its wake during Saturday afternoon and early evening, before eventually decaying later. 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.

Heavy rain, with some thunderstorms, may lead to disruption in places on Friday night and through much of Saturday

The public is advised to take extra care, further information and advice can be found here: http://www.metoffice.gov.uk/weather/uk/links.html