Summary
Many train and bus services cancelled or reduced
Flights from Cardiff Airport also cancelled
Prime minister and first minister thank public services for their efforts
Hospitals call on staff with 4x4 vehicles to help colleagues get into work
Yellow "be aware" warning for snow and ice for the whole of Wales until 23:55 GMT
Four flood alerts in place, three in south west Wales and one in the north east
More than 1,100 schools closed throughout the day
Mid Wales too...published at 09:37 Greenwich Mean Time 2 March 2018
Travel advicepublished at 09:36 Greenwich Mean Time 2 March 2018
River Wye freezespublished at 09:26 Greenwich Mean Time 2 March 2018
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End of twitter postAmbulance service issues appealpublished at 09:23 Greenwich Mean Time 2 March 2018
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End of twitter post'Worst weather for 36 years'published at 09:18 Greenwich Mean Time 2 March 2018
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End of twitter postPassengers stuck in broken-down trainpublished at 09:17 Greenwich Mean Time 2 March 2018
Passengers were trapped in frosty carriages overnight after a broken-down train caused tailbacks on the rest of the tracks.
The 4:30pm service from Cardiff to Bournemouth was stuck at Christchurch, Dorset, until about 8am this morning.
Shane White, who was on the train, said "apparently one train near Christchurch has welded itself to the track trying to move".
"They have been trying all night to come up with a solution but trains have ran out of battery power etc, there was some rain that has frozen points and other electrical connections, with all the roads blocked and vehicle snowed in there is no road transport available," he added.
'Game off'published at 09:15 Greenwich Mean Time 2 March 2018
Sporting fixtures across Wales are being postponed this weekend:
RUGBY
Pro 14:
Cardiff Blues v Benetton Treviso
Zebre v Ospreys
Scarlets v Leinster
FOOTBALL
League Two:
Newport v Accrington Stanley
National League:
Ebbsfleet United v Wrexham
ICE HOCKEY
Elite League:
Cardiff Devils v Manchester Storm
'Hazardous' weather conditionspublished at 09:15 Greenwich Mean Time 2 March 2018
Media caption, Storm Emma: Warning of hazardous weather conditions
Quote MessageSome hazardous conditions out there this morning.... risk of snow and ice. If that wasn't enough, we've got gusty winds of 60 -70mph likely for exposed areas in the north and west"
Behnaz Akhgar, BBC Wales weather presenter
'Considerable damage' to marinapublished at 09:11 Greenwich Mean Time 2 March 2018
Holyhead Marina has taken a bit of a battering during last night's weather.
The RNLI says it had to move its all weather lifeboat to a safer berth in the inner harbour area.
"There is considerable damage and disruption at the marina, so for now we will stay berthed within the inner harbour, ready to respond (slower than usual, but able) to a shout," a spokesman said.
Wales snow - your morning briefingpublished at 08:58 Greenwich Mean Time 2 March 2018
- Yellow "be aware" warning for snow and ice for Wales in place until 23:55 GMT
- Biggest UK snowfall overnight was at St Athan with 51cms (20 in)
- More than 1,100 schools closed
- Vehicles abandoned or parked on M4 motorway
- Major routes in Wales blocked or difficult to pass
- Flights grounded as Cardiff Airport currently shut
- Trains and buses suspended
- More than 2,500 properties without power
Image source, gettySnow forces lane closurespublished at 08:49 Greenwich Mean Time 2 March 2018
Motorway struggling this morning
Meanwhile, the M4 between Cardiff and Newport is down to one lane
'Biggest UK snowfall in Wales'published at 08:49 Greenwich Mean Time 2 March 2018
Greatest drifts in the Vale of Glamorgan
St Athan had the deepest overnight snow in the UK with 51cm (20 in), according to the Met Office.
Bryn Bach Park in Tredegar was the second coldest place in the UK overnight, behind Baltasound in Shetland, with -5.5 degrees centigrade at 04:00 GMT
Image source, Getty ImagesM4 deserted of carspublished at 08:35 Greenwich Mean Time 2 March 2018
Now that's a sight you don't often see - drivers near Cardiff seem to have taken heed of travel warnings.
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End of twitter postYellow weather warning issuedpublished at 08:32 Greenwich Mean Time 2 March 2018
The amber "be prepared" weather warning for Wales has now ended.
But we're afraid we're not out of it yet - the whole of Wales is now covered by a yellow "be aware" warning for snow, ice and wind.
Image source, Met OfficeA white-out in Newportpublished at 08:30 Greenwich Mean Time 2 March 2018
'Phenomenal response' to stranded couplepublished at 08:24 Greenwich Mean Time 2 March 2018
Flights at Cardiff Airport groundedpublished at 08:20 Greenwich Mean Time 2 March 2018
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End of twitter post'Urge caution'published at 08:12 Greenwich Mean Time 2 March 2018
South Wales Police warning
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End of twitter postPower outage updatepublished at 08:09 Greenwich Mean Time 2 March 2018
Scottish Power says about 2,000 homes are without power in mid and north Wales - most in and around Aberystwyth, Ceredigion and parts of Gwynedd.
Western Power confirms 852 properties in south Wales also have power outages.
Image source, Getty ImagesWhat's behind the current cold snap?published at 08:03 Greenwich Mean Time 2 March 2018
As Wales shivers this morning, what's behind this freezing weather?
Image source, James BullardImage caption, Snow scenes at Llyn Ogwen in Snowdonia