Sat, June 21, 2025 15:00 - Sun, June 22, 2025 04:00 Whilst many places will likely remain dry and unaffected, scattered thunderstorms may develop during Saturday afternoon, lasting through the evening hours, moving northeastwards before eventually clearing to the North Sea by the early hours of Sunday. The most intense thunderstorms could produce frequent lightning, large hail and gusty winds, along with some heavy downpours for a time. This may lead to some surface water impacts in places.
For further details see https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings (UK Met Office)
Sat, June 21, 2025 17:00 - Sun, June 22, 2025 03:00 Information on update: Warning area has been extended into southeast Scotland whilst parts of East Midlands have been removed. The warning start time has been delayed slightly and end time an hour earlier. Whilst some showers and isolated thunderstorms are expected during Saturday afternoon, further and potentially intense thunderstorms are likely to develop during Saturday evening across northwest England and perhaps northeast Wales. Whilst there is still some uncertainty in when and where these develop, thunderstorms could produce a combination of frequent lightning, large hail, strong winds and heavy rain (in places, 30-40 mm in less than 2 hours) as they move northeast into northeast England and perhaps southeast Scotland overnight. Thunderstorms are expected to move offshore into the North Sea during the latter part of Saturday night.
For further details see https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings (UK Met Office)