A yellow thunderstorm warning has been issued by the Met Office, affecting significant portions of the UK as temperatures are set to climb as high as 27C in some areas. The warning, which came into effect from early afternoon, highlights the potential for disruptive weather including heavy downpours, lightning, hail, and strong winds.
For England, the warning covers a broad swathe from the South West up through the Midlands, into parts of the North West and North East. Wales is also largely included, with the potential for intense, localised storms. In Scotland, southern regions are under the warning, while Northern Ireland also faces a risk of thunderstorms. These conditions follow a period of warmer weather, which is often a precursor to such atmospheric instability.
The Met Office has detailed several potential impacts of the anticipated thunderstorms. These include a small chance of localised flooding of homes and businesses, which could lead to damage to buildings and infrastructure. There is also a risk of power cuts and other disruptions to services. Travel could be significantly affected, with possible delays or cancellations to train and bus services, and difficult driving conditions due to surface water and reduced visibility.
In terms of temperatures, the mercury is expected to reach around 27C in parts of southern England, particularly ahead of the storm fronts. Even in areas further north, temperatures are forecast to be in the low to mid-20s Celsius. Wind speeds during the storms could gust to between 30-40 mph, exacerbating the risk of falling branches and other hazards. The public is advised to stay updated with local forecasts and be prepared for rapidly changing weather conditions.
Practical safety advice issued by authorities includes avoiding open water during storms due to the risk of lightning, and seeking immediate shelter indoors if thunder is heard. It is also recommended to unplug non-essential electrical appliances and to avoid using landline phones during a thunderstorm. Drivers should exercise extreme caution, reduce speed, and be aware of potential hazards such as standing water and debris on roads.