Spells of heavy and persistent rain are expected over some areas of western and northern Britain accompanied by strong winds at times on Sunday and Monday.
There is a small chance that homes and businesses could be flooded, causing damage to some buildings and that some communities could become cut off by flooded roads.
Where flooding occurs there is a slight chance of delays to train and bus services whilst spray and flooding could lead to difficult driving conditions and some road closures.
There is a small chance of fast flowing water or deep floodwater causing danger to life.
In addition, strong winds may be an additional hazard at times with a slight chance of trees falling, power cuts and loss of other services to homes and businesses.
A spokesman for the Met Office said: “Spells of heavy rain are likely to reach western Britain later on Saturday and may become prolonged by the early hours of Sunday, only clearing southeastwards later on Sunday.
“Many places, particularly high ground will see 25-50 mm of rain, but where the rain becomes prolonged as much as 100 mm could fall over upland areas.
“The exact location of where the largest rainfall totals will occur is currently uncertain.
“Although it looks as if the more persistent rain should clear away southeastwards later on Sunday, further heavy persistent rain is possible in places on Monday; this appears more likely across the more southwestern parts of Britain. Strong winds are likely at times, with gusts of 50-60 mph possible in some exposed coastal areas.”