Expect heavy showers and thunderstorms to develop in the afternoon across parts of southwest England, Wales, and the West Midlands, before gradually diminishing in the evening. While many areas may escape the worst of the weather, where storms do form, there is a chance of slow-moving and intense downpours, resulting in rainfall accumulations of 20-30 mm in just 1 hour, with a lower possibility of 40-50 mm within 2-3 hours in certain spots. Frequent lightning strikes and hail are also a possibility.
Consider the risk of flash flooding in your area and make preparations by creating a flood plan and emergency flood kit. Secure moveable objects and temporary structures, such as bins, garden furniture, trampolines, tents, gazebos, sheds, and fences, to prevent damage or injury before strong winds arrive. Check road conditions or public transport schedules to avoid potential delays in your travel plans. Be ready for power cuts by gathering essential items like torches, batteries, a mobile phone power pack, and other necessities.
If caught outside during a storm with thunder, seek shelter in a safe enclosed area, like a car. Avoid standing near trees or structures that could be hit by lightning. Move to lower ground if you are on an elevated area. Stay updated on weather warnings as they can change rapidly, and follow the advice of the Met Office to stay informed about the forecast in your locality.