The latest named storm is forecast to bring heavy rain and gale force winds, bringing potential disruption to parts of the UK.
An amber weather warning is in place for parts of England and Northern Ireland with heavy rain and severe gale-force winds set to strike.
There is also potential for 80mph gusts in some areas and a less severe yellow warning is also in place in parts.
This latest storm follows hot on the heels of the disruptive Storm Ciarán, which brought misery to many around the UK, although London did not feel the worst of it.
Here are the details of the latest named weather event set to hit the isles.
What storm is coming?
Storm Debi, as it has been named, is being felt across the UK already.
Power outages have been reported across the island of Ireland, with tens of thousands of homes left without electricity after the storm made landfall overnight into Monday.
Met Office chief meteorologist Matthew Lehnert said: “Storm Debi has developed rapidly overnight and will bring impacts across parts of the UK today.”
The Met Office goes through the alphabet with its storm names and the next one, whenever it comes, will be called Elin.
Where will it impact?
The storm has already hit Northern Ireland and the Republic on Sunday evening into Monday. According to the Met Office, it will then sweep into Wales and the UK.
An amber warning for wind is in place from 10am to 6pm on Monday for wind in the northeast of England.
The Met Office has warned people in those areas should be wary of solid and disruptive winds with the possibility of flying debris.
Damage to buildings and structures is likely, and heavy items such as tiles blown from roofs may present a potential danger to life.
The Met Office also warned that roads and bridges are likely to close, meaning longer journey times and public transport and other cancellations are possible, with road, rail, air and ferry services to be affected.
People are also warned that cuts to power, mobile phone reception, and more may occur as the storm batters power and telecommunication lines.
A less severe yellow warning for wind and rain will be in place from 4am until 6pm for areas including Bangor and St Davids in Wales and Manchester, Sheffield, and Liverpool in England, bringing a potential danger to life from flying debris.
London weather forecast this week
The capital is not, currently, subject to any weather warnings with the southernmost part of the yellow warning being in Wales.
However, “gusty winds and heavy rain” have been forecast by the BBC for London - with both set to peak at around 11am to midday.
There is set to be “light rain showers and a moderate breeze” on Tuesday, again peaking over lunchtime. Wednesday will be fine but Thursday and Friday could also be quite wet.
