Overview

• The UK's prolonged dry spell has ended, with heavy rain and thunderstorms forecast to sweep the country starting May 24, marking a significant weather shift.
• The Environment Agency has issued a flood alert for the River Mimram in Hertfordshire due to high groundwater levels and expected rainfall.
• Forecasters predict downpours across multiple regions, including Greater Manchester, Lancashire, and Greater London, with localized rainfall rates reaching 10mm per hour in some areas.
• Thunderstorms and strong winds are possible, particularly in southern England and Wales, as low-pressure systems move in from the Atlantic.
• Despite the unsettled weather, the Bank Holiday weekend is not expected to be a complete washout, with periods of sunshine and dry spells anticipated alongside the rain.