Heavier snowfall than expected falls across the south-west of England
Many schools across Devon and Cornwall are closed
Several incidents and delays reported on A30
Yellow weather warning in place until 15:00 GMT
Listen to advice from Jen Murphy, from Devon Highways, for anyone travelling today.
She also warns once the snow has gone there will be very wet roads across the county, which could cause flooding and then freeze overnight.
The Cornish village of Minions has recorded a snow depth of 20cm.
Image source, CornwallSkies
Heavy snow has fallen on Dartmoor in Devon
Peter Parsons, owner of the Warren House Inn, near Yelverton on Dartmoor, says he did not open the historic pub today due to the snow.
"We didn't open today purely for the safety of our staff," he says.
"Tomorrow will be fine but today just wasn't wise."
Mr Parsons says there has barely been any traffic on the moors today.
"There's been nothing much moving yet," he says.
Major roads in Devon and Cornwall remain covered in snow and ice.
Snow has settled around the A395 between Launceston and Otterham, while BBC reporter Angela Kalwaites says the A39 through Camelford and Otterham is shut due to heavy snow.
National Highways is warning drivers to be aware of snowfall on the A30, with several incidents already reported along sections of the road.
It says traffic was held on the east-bound carriage on the A30, between the A38 near Bodmin and the A395 Kennards House, due to a stranded lorry.
Image source, Angela Kalwaites/BBCSnow covers the the A395 from Launceston to Otterham
A blanket of heavy snow has fallen on north and east Cornwall, causing serious problems on the roads and forcing the closure of dozens of schools.
BBC Radio Cornwall's James Churchfield has a round-up of how the county has fared.
Image source, Met OfficeStorm Bert will bring heavy rain and strong winds to the South West at the weekend, the Met Office says.
It says 50-75mm of was expected to fall "fairly widely" across both days, adding there was a chance some places over Dartmoor could see between 100-125 mm.
"Strong southerly winds will accompany the heavy rain and may locally exacerbate impacts," it says.
Named by Ireland's Met Éireann, Storm Bert is the second named storm of the season.
Jen Murphy, from Devon County Council Highways, says additional gritters are due to set out in the next hour in the Okehampton and Whiddon Down areas.
She says a "troubleshooting" gritter is also travelling around Exeter.
"Fallen trees are something that we are seeing quite a few of across the county," she says.
"Between the rain in the north and the south [and] the weight of the snow on them... we have quite a few routes with fallen trees."
The Met Office has issued further yellow warnings for ice and rain covering parts of Devon and Cornwall.
It says icy patches may lead to travel disruption in both counties, with a warning in place from 17:00 GMT on Thursday until 10:00 on Friday.
As Storm Bert hits, a yellow warning for heavy rain comes into force from 06:00 on Saturday, expiring at 23:45 on Sunday.
The current warning for snow is active until 15:00.
Image source, Met OfficeThe current warning for snow is active until 15:00
Miles Davis
BBC News, South West
With no school for some Devon children, people are taking advantage of the snowy conditions.
I was in Heavitree Park, where the snow really picked up at about 07:00 GMT and has been coming down steadily since then.
With lots of local schools closed, Heavitree Park is busy with children building snowmen, dogs enjoying a run in the white stuff and the occasional snowball fight.
David Braine
BBC South West senior broadcast meteorologist
St Mary's in the Isles of Scilly and Berry Head, near Brixham, are experiencing wind gusts of 60mph (96km/h)
Strong easterly winds are also affecting travel, and blowing the snow around on the moors.
The area of low pressure that has brought the snow is also giving strong and gusty easterly winds, with gusts of between 45-55mph (70-88km/h).
There are currently high tides on east facing coasts.
Heavy snow is falling in Exeter. It has blanketed Exeter Cathedral's Christmas Market.
Image source, Harry MedwayPeople across Devon and Cornwall have woken to a blanket of snow in parts.
Devon and Cornwall Police has advised drivers to check the weather before travelling, adding it had received numerous calls from motorists involved in collisions.
The force's roads and policing team said the "majority" of roads across the two counties were covered in "snow and ice".
More than 100 schools have shut across the region, with one resident claiming a school bus has been abandoned near Exeter due to the weather.
BBC senior weather reported David Braine said the snow has been heavier and more widespread than forecast.
"The Met Office has extended the area covered by the snow warning and increased the forecast amount to 10-15cm," he said.
Image source, Sam UglowSteve Bayley, network manager for Cornwall Highways, said gritters were deployed this morning.
"We expected cold temperatures overnight so we were treating overnight, then we got a fair amount of snow this morning so we went out again," he said.
Speaking to Radio Devon, Jen Murphy from Devon County Council's highways control said the worst of the problems were on Dartmoor.
"However, it is very widespread," she added.
Image source, TomTOne woman told BBC Radio Devon a school bus had become trapped in the snow.
Chloe, from Upton Pyne, near Exeter, said: "Basically, it got stuck and it just had to park up. It is still here.
"The driver is not in it, I think someone came to pick him up."
David Braine
Senior weather presenter
This morning's snow was heavier and more widespread than forecast, with a fine line between rain/sleet and snow being perhaps only one degree or so in temperature difference.
Any higher ground seems to have had sleet or snow this morning and the met office have extended the area covered by the snow warning and increased the forecast amount to 10-15cm.
In some areas we have already had this amount.
Kirk England
Environment & Tourism Correspondent, BBC South West
There may be several inches of snow on the ground in Exbourne but residents in the West Devon village are still having their rubbish collected.
“We’re just taking it steady and we’re still managing to get around,” said Johnathan Mann, from the local council’s Waste and Recycling Team.
He added it was very quiet on the roads with “lots of cars abandoned at the side of the road all over the place”.
Image source, Johnathan MannResidents living in Sidmouth have been treated to a blanket of snow.
Image source, DevonjackieBBC Devon reporter Richard Green, who is on the M5 motorway overbridge at Sandy Park in Exeter, says more snow is falling there.
"There is another wave of snow coming down here in east devon at the moment.
"The motorway is passable, but the outside lane is almost covered in snow and the other lanes are tracked with slushy snow.
"The M5 motorway is starting to get covered, I haven't seen any salt and grit vans.
"The A30 is slow but moving but there are big queues of people trying to get in to Exeter."
"It’s awfully cold and the wind is absolutely biting," Andy in Bodmin told BBC Radio Cornwall.
"It is snowing significantly, it’s not going to take long to get a depth going.”
He added: “When they say snow for Cornwall you always take it with a pinch of salt as you don’t know how its going to develop.
“I said to my wife last night if it does meet that cold air, then it’s going to be nasty and obviously it has.”