Warning: Yellow

To expect: Thunderstorms

Affected areas: Northern Ireland

Start time estimate: Tuesday noon

End time estimate: Tuesday 9pm

The Met Office has issued a Yellow thunderstorm warning for Northern Ireland for Tuesday.

A Yellow weather alert is in effect during Tuesday, starting from around noon and running until 9pm. Forecasters say the affected region can expect to see frequent lightning strikes and heavy downpours.

The Yellow warning for thunderstorms was announced at 8:58am on Monday, August 3.

A Met Office forecast said: “Showers will develop Tuesday morning, becoming heavy and locally thundery into the afternoon. Whilst some areas will miss these, where they do develop they will be slow-moving, bringing 20-30 mm of rain in an hour or two. Strong and gusty winds and hail will also be possible with the heaviest showers. Showers should slowly ease from the west into the evening.”

What to expect

Some flooding of a few homes and businesses likely, leading to some damage to buildings or structures; There is a good chance driving conditions will be affected by spray, standing water and/or hail, leading to longer journey times by car and bus; Delays to train services are possible; Possibly some damage to a few buildings and structures from lightning strikes; Some short term loss of power and other services is likely.

What should you do during intense thunderstorms?

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. For further details see Met Office Warnings & Advice.

What is a yellow weather warning?

The Met Office has three categories of weather warning, depending on the likely impact of severe weather and also how likely it is to strike in a particular area.

A yellow warning is issued when weather conditions are expected to disrupt travel and traffic and may impact on daily routines but are not likely to pose a risk to life or property.

An amber warning is more severe and advises people to think about changing their plans to minimise the risk.

A red warning means weather conditions are expected to be dangerous with widespread damage to property and a risk to life, with the public usually advised to avoid travelling.

The Yellow weather alert for thunderstorms will remain in place until 9pm on Tuesday.