Parts of Greater Manchester could be hit by 18 hours of torrential rain on Monday and Tuesday.
The Met Office has issued a yellow weather warning for rain for much of the North West of England.
Forecasters are warning the downpours could begin at around 6pm on Monday and continue until noon the following day.
And with the ground already saturated from the wettest February on record, the Met Office say it could lead to 'some flooding and disruption'.
The warning covers parts of Bolton , Bury , Rochdale , Oldham and Tameside .
Downpours will be heaviest over high ground.
The Met Office warning says: "Rain, heavy at times, will arrive from the west later on Monday and persist until Tuesday late morning or early afternoon.
"20 to 40 mm rain is likely to fall widely, with a chance of 50 to 70 mm in a few places over higher ground.
"Given saturated ground and high river levels, this may be enough for some flooding and disruption."
The Met Office forecast says there's at least a 95 per cent chance of heavy rain from 6pm on Monday until 6am on Tuesday, dropping to an 80% chance by noon.
Temperatures are set to be quite mild though, with highs of 9C on Monday and 13C on Tuesday.
There are no current flood warnings in place for our region.
