Some areas may remain dry, but thunderstorms are expected to develop later today and move slowly from east to west or northwest. These storms could bring heavy rain, lightning, and the possibility of hail, with up to 30 mm of rain falling in a short period in some places, and possibly even up to 50 mm in isolated spots. To prepare for potential flash flooding, consider creating a flood plan and emergency kit. Check road, bus, and train conditions to avoid delays and be ready for power outages by gathering essential items like torches, batteries, and a mobile phone power pack. If caught outside during a thunderstorm, seek shelter in a safe enclosed space such as a car, avoiding trees and elevated areas. Stay updated on weather warnings as they may change quickly, according to the Met Office recommendations.