Weather Warnings Archive: Tuesday 30 Jun 2026 09:29 BST - UK

issued by the Metoffice at
   08:29, 30.06.2026

valid from
   12:00, 30.06.2026
until
   18:00, 30.06.2026

Region: Northern Ireland

Following overnight rain, showers and thunderstorms are expected to develop across much of Northern Ireland. These showers and thunderstorms will become slow-moving for a time this afternoon, leading to the potential for some large rainfall accumulations to build up in a few places. 10-15 mm of rain likely in less than an hour for some, and perhaps 25-30 mm in 2-3 hours. This could cause some temporary flooding and difficult driving conditions. Hail and lightning will be additional hazards in the heaviest showers. What Should I Do? Consider if your location is at risk of flash flooding. If so, consider preparing a flood plan and an emergency flood kit. Give yourself the best chance of avoiding delays by checking road conditions if driving, or bus and train timetables, amending your travel plans if necessary. People cope better with power cuts when they have prepared for them in advance. It’s easy to do; consider gathering torches and batteries, a mobile phone power pack and other essential items. If you find yourself outside and hear thunder, protect yourself by finding a safe enclosed shelter (such as a car). Do not shelter under or near trees, or other structures which may be struck by lightning. If you are on an elevated area move to lower ground. Be prepared for weather warnings to change quickly: when a weather warning is issued, the Met Office recommends staying up to date with the weather forecast in your area.

Slow-moving thunderstorms this afternoon may cause travel disruption and flooding in a few places.

The public is advised to take extra care, further information and advice can be found here: http://www.metoffice.gov.uk/weather/uk/links.html