Cornwall thunderstorm warning extended to cover THREE days
The Met Office says there is a risk of lightning strikes and downpours on Monday, Tuesday and Wednesday
Last updated 14th Aug 2022
It is the final day of an amber 'Extreme Heat' weather warning for parts of Cornwall, but that will be replaced THREE days' worth of thunderstorm warnings.
The Met Office has extended its yellow weather warning for thunderstorms in the Duchy to cover Tuesday as well Monday - and issued another for Wednesday.
Forecasters say that while some areas will remain dry, others are at risk of lightning strikes and downpours.
That could mean flash-flooding, possible power cuts and disruption on the roads and trains.
The thunderstorm warnings will be in force from 10am on Monday 15th August to 23.59pm on Tuesday 16th August and from 9am to 23.59pm on Wednesday 17th August.
For tomorrow, the Met Office says: "Hit-and-miss thunderstorms likely to develop through Monday, producing some torrential downpours for some spots, and possible disruption".
For Tuesday and Wednesday, forecasters say: "While some places stay dry, others are likely to see thunderstorms with torrential rain".
What can we expect?
Spray and sudden flooding could lead to difficult driving conditions and some road closures.
There is a chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater, lightning strikes, hail or strong winds.
There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost.
There is a small chance of fast flowing or deep floodwater.
Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to train and bus services.
Monday's forecast states: "Already some showers to start the day, but these likely to become more widespread and heavier through the late morning and afternoon, lasting into the evening in places.
"Some counties are likely to miss the worst of these storms but where they do occur, slow-moving torrential downpours could produce 20-30mm inside an hour, with 40-50mm falling in around 2-3 hours in a few spots. Hail and frequent lightning could pose additional hazards for some".
Tuesday's forecast states: "Whilst some places will miss them, thunderstorms and areas of heavy rain seem likely to develop quite widely on Tuesday across parts of England and Wales.
"20-30mm of rain is possible within an hour, but where areas of thundery rain become slow-moving, some places could see 50mm in less than three hours.
"There is a low probability that higher totals could occur in a few spots over the course of the day, while hail and frequent lightning are likely additional hazards for some places. There is considerable uncertainty at this stage in regional and county level focus".
Wednesday's forecast states: "Whilst some places will miss them, thunderstorms and areas of heavy rain will develop quite widely on Wednesday across the southern England.
"20-30mm of rain is possible within an hour, but where areas of thundery rain become slow-moving, some places could see 60mm in less than three hours. A few spots could see more rainfall than this still, whilst hail and lightning may be additional hazards".
You can check the latest weather warnings for Cornwall and the UK on the Met Office website.