Weather forecasts indicate varied conditions across the UK with predictions of a mini heatwave and potential travel disruptions due to thunderstorms. Next weekend, temperatures are expected to climb above 20C in areas such as Bristol, West Sussex, and Hampshire, with a peak of 21C. However, Manchester, Birmingham, and Liverpool may experience light rain amidst warmer conditions.

The Met Office defines a heatwave as three consecutive days with temperatures at least 25C, a benchmark unlikely to be met according to current forecasts. High pressure will predominantly bring dry and sunny weather to the UK, although the northwest might experience some rain and cloudiness.

Bank holiday Monday will see mixed weather, with warm temperatures up to 21C in East Yorkshire and Lincolnshire, while London and other parts of the South face thunderstorms and potential heavy downpours, affecting travel plans. The capital is expected to endure over 12 hours of rain, complicating the return from bank holiday breaks, especially with looming rail strikes by Aslef causing additional concerns for commuters.

Residents and travelers are advised to stay updated on weather developments and plan accordingly, particularly if involved in outdoor activities or travel during these times. Forecasts suggest fluctuating conditions, with opportunities for sunshine interrupted by showers and cooler spells, typical of early May in the UK.