WALKERS taking part in Edinburgh’s MoonWalk have been warned that torrential thunderstorms are expected to sweep across the Lothians on Saturday into Sunday morning.
Flood alerts are in place for the Edinburgh and the Lothians and the Scottish Borders, which are expected to be hardest hit.
The alerts, issued by Sepa, are currently at the lowest of three warning levels, meaning that “flooding is possible” and the public should “be prepared”.
The Met Office has also urged the public to be aware of the potential for localised flooding due to the intensity of the storms.
They say they expect heavy showers to worsen throughout Saturday with torrential downpours between 4pm and midnight.
A yellow severe weather warning has been issued, meaning there is a moderate risk of some damage to infrastructure and local disruption.
Thousands of walkers are expected to take part in the annual breast cancer charity event which starts at 8:30pm in Inverleith Park on Saturday night. Forecasters are predicting that is when the worst of the storms will arrive in central Scotland.
Many fundraisers are planning to complete a double marathon distance of over 50 miles.
The Scottish branch of the MoonWalk has raised £16 million since it launched in 2006.
Eddy Carroll, Met Office chief forecaster, said: “Warm, humid air is likely to be pulled northwards from France late on Friday and during Saturday.
“Within this air mass, there is an increasing likelihood that heavy, thundery showers will break out. It will remain warm”.