Thunderstorms and heavy showers are predicted for today and Wednesday, leading the Met Office to issue a yellow weather warning.
The Met Office said the showers and thunderstorms are expected to develop from 9am and last until 6am on Wednesday across northern and central England and much of Wales.
It said they could be prolonged storms in the North West of England in particular., adding that 20mm to 30mm of rain is possible in around one or two hours, and a few places could see around 60mm in three to six hours.
Lightning and hail may pose additional hazards in a few locations, it added and the storms may lead to flooding and transport disruption.
What to expect
- Spray and sudden flooding could lead to difficult driving conditions and possibly some road closures
- Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to train and bus services
- There is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater or lightning strikes.
Advice from the Met Office
There are many myths surrounding lightning – such as lightning never strikes the same place twice or it always strikes the tallest object. Both are false, as lightning strikes the best conductor on the ground – whether it has been struck before or not.
Make sure you know what to do
Before the thunderstorm
- Lightning can cause power surges, unplug any non-essential appliances if not already using a surge protector.
- Seek shelter if possible. When you hear thunder you are already within range of where the next ground flash may occur, lightning can strike as far as 10 miles away from the centre of a storm.
During the thunderstorm
- Telephone lines can conduct electricity so try to avoid using the landline, unless in an emergency
- If outside avoid water and find a low-lying open place that is a safe distance from trees, poles or metal objects
- Avoid activities such as golf, rod fishing or boating on a lake
- Be aware of metal objects that can conduct or attract lightning, including golf clubs, golf buggies, fishing rods, umbrellas, motorbikes, bicycles, wheelchairs, mobility scooters, pushchairs, wire fencing and rails. If you are in a tent, try to stay away from the metal poles
- If you find yourself in an exposed location it may be advisable to squat close to the ground, with hands on knees and with head tucked between them. Try to touch as little of the ground with your body as possible, do not lie down on the ground
- If you feel your hair stand on end, drop to the above position immediately
After the thunderstorm
- Avoid downed power lines or broken cables
- If someone is struck by lightning, they often suffer severe burns. The strike also affects the heart, so check if they have a pulse.
Driving in a thunderstorm
If you are caught out in thunder and lightning it is advised that you wind up the windows and stay inside your car. This is because in the vast majority of cars with a metal roof and frame, the frame will act as a conductive Faraday cage, passing the current around the passengers inside and on to the ground.
- Soft-top convertibles, with their fabric roofs, are the most at risk and could catch fire if struck by lightning
- Be aware that current can travel through other parts of many modern cars, including GPS and radio systems. Cars with metal interior handles, foot pedals and steering wheels can also carry current
- Cars can be damaged both internally and externally by lightning strikes
Thunderstorms can also bring a risk of sudden gusty winds, those most at risk would include cyclists, motorcyclists and high sided vehicles.
- Remember to give vulnerable road users including cyclists, motorcyclists and pedestrians more room than usual. They are more likely to be blown around by side winds – always keep a safe distance.
- Keep your speed down, lowering your speed will lower the distance you travel when buffeted around by the wind.
Hail storms can be extremely dangerous to drive in reducing your ability to see and be seen, as well as causing damage to your vehicle. If hail is severe, stop and pull over to a safe place and remain inside the vehicle.
