A amber thunderstorm warning covers parts across England and Wales starting at 6am on Friday, July 17. Powerful gusts of 30 to 40 mph are expected, with some large hail possible. The main hail risk focuses on East Midlands and London corridors during morning and late travel times. The alert lasts from dawn to dusk until evening but heavy rain could still lead to localized floods in places where drains are clogged in low‑lying areas.