A transporting band of Atlantic storms hits the southwest with official yellow warnings of wind and rain from the Met office.
The Met Office has told DevonLive that the rain is raining the worst on Saturday afternoon and into the evening, making the driving conditions very difficult.
Meteorologist Sophie Yeomans from the Met office in Exeter listed the places that are likely to experience the strongest winds – starting on Saturday at 4am and continuing all day.
She said, "Both the south and north coasts of Devon can see very strong winds.
"The winds come from the southwest so that strong winds of up to 70 km / h can be seen on exposed coasts or higher areas, including inland.
"Places like Hope Cove and Thurlestone, which are really south-westerly, are getting the worst of the wind, and even further inland in Exeter and off the coast 5, there will still be winds of 50 to 60 miles per hour.
"On Dartmoor and Exmoor, the strongest wind will again be seen somewhere on a southwest-facing hill, as well as on the northern shores of Devon, which point in that direction.
"It will be very windy, but there will be heavy rain, which will make the conditions on Saturday afternoon and in the evening very difficult."
Extreme weather, which could see winds of 70 km / h in parts of Devon and Cornwall, will not be a Storm Hannah, according to the Met office.
The weather service has been issuing yellow weather alerts with extreme wind, rain and snow forecasts for parts of the UK all Saturday.
In Devon and Cornwall, wind speeds of up to 70 km / h are expected on Saturday between 4:00 and 21:00.
A spokesperson for the Met Office said, "The gravure system that will lead through Britain tomorrow was not named, and it seems unlikely that the Met Office will name it at the moment."
According to the Met Bureau, "The criteria we use to designate storms are based on our National Severe Weather Warnings service, based on a combination of weather effects and the likelihood of these impacts occurring.
"A storm is named if it can have the warning that amber is ready" or "red".
"Other types of weather are also being considered, especially rainfall, when the impacts, as recommended by the Environmental Protection Agency, SEPA and Natural Resources Wales, can cause flooding, so" storm systems "due to wind effects could be mentioned of rain and snow. "
Throughout Wales and the northwest of England, there are yellow warnings of rain that are in effect from Saturday morning until midnight and Saturday night until 11:59 pm.
And Northern Ireland, the far north of England, and parts of Scotland have received a yellow warning about snow.
In a series of tweets, the Met office said, "There are many weather warnings for the rest of this week #WeatherAware ,
"And the reason for the weather warnings … A conveyor belt of weather systems that block our way …
The accompanying video shows an Atlantic "conveyor belt" of extreme, wet and windy weather moving in this direction from America.
Wind charts from the surfing prediction site Magic Seaweed show that Devon and Cornwall's strongest winds are expected by 3pm on Saturday afternoon.
The Met Office weather for South West England
On Saturday wet and windy, with heavy storms. On Sunday brighter and sunny with hail and snow. Monday then looks sunshine and light winds.