The weather warning, issued by the Met Office, concerns parts of southwest England and south Wales, where up to 50mm of rain is expected in an 18-hour period this week
More flooding is feared across the UK as further downpours are expected on Friday night and throughout Saturday.
The Met Office says up to 50mm of rain will fall across southwest England and south Wales, which is nearly half of the average rainfall Cardiff typically sees in November. A yellow weather warning has been issued from 9pm on Friday until 3pm on Saturday as forecasters are concerned homes and businesses will be liable to flooding.
This is because ground is saturated in parts of the regions affected following frequent downpours at the start of the month. At the time of writing, 10 flood warnings and a further 84 flood alerts were in place for England by the Environment Agency.
There is particular concern for Curry Moor and Hay Moor near Bridgwater, Somerset, and the nearby River Tone. There are multiple flood alerts in the southwest of England, including Rivers Clyst and Culm and their tributaries.
Writing on its website, the Met Office says: “Another area of rain will cross the UK starting from Friday evening, before it clears to the east during Saturday. Some of that rain, especially in southwestern parts of the UK, is likely to be heavy at times, and follows many weeks of above-average rainfall in this area.
“The associated weather system should clear to the east during Saturday afternoon, with more showery conditions following. 10 to 15mm is expected widely in the warning area, with a few places near southern coasts and over high ground seeing 20 to 30mm, with a chance that the southern slopes of Dartmoor and the hills of southwest Wales could see 40 to 50mm.”
Spray and flooding could lead to difficult driving conditions and some road closures. Delays or cancellations to train and bus services are possible and flooding of a few homes and businesses is likely, the Met Office adds.
Although the weather warning concerns southwest England and parts of Wales, it is widely expected to be a wet Saturday across the UK. New weather maps by WXCharts show the movement of the low pressure across the UK. The Met Office’s model is similar, although it anticipates the heaviest rainfall at or around 9am for many. However, it believes the rain will move quickly and by 3pm, skies will clear in most regions.