Expect heavy showers and thunderstorms to develop in the afternoon in parts of southwest England, tapering off in the evening. Some areas may experience slow-moving downpours, resulting in accumulations of 20-30 mm in an hour, with a few locations potentially seeing 40-50 mm in 2-3 hours. Lightning strikes and hail are also possible.
To prepare, determine if your location is at risk of flash flooding and create a flood plan and emergency flood kit if necessary. Secure moveable objects and temporary structures before strong winds arrive. Check road conditions and transportation schedules to avoid delays. Gather necessary items like torches, batteries, and a mobile phone power pack in case of power outages.
If caught outdoors during a thunderstorm, seek shelter in a safe enclosed area like a car. Avoid trees or other structures that may be hit by lightning. Stay informed of changing weather warnings by following the Met Office forecasts.