A band of heavy snow has moved across north Wales overnight, bringing more disruption Heavy snow has fallen across north Wales overnight, closing more than 100 schools.
A Met Office warning for Gwynedd, Anglesey, Conwy, Denbighshire, Flintshire and Wrexham until 0900 GMT
Up to 10 ins (25cms) of snow fell on higher ground and police say drivers should take care, especially on the A55.
Meanwhile, the assembly government has tried to allay concerns about grit as councils report dwindling supplies.
Some 8-10 ins (20-25cms) of snow has fallen on Anglesey overnight, with around 8in (20 cms) in Gwynedd and Conwy.
The A470 Crimea Pass between Blaenau Ffestiniog and Dolwyddelan and Pen-Y-Pass mountain pass in Gwynedd are closed.
The Arriva Trains Wales service between Blaenau Ffestiniog and Llandudno Junction is also suspended due to adverse weather conditions.
More than 90 schools are closed in Powys, with others shut in Carmarthenshire, Ceredigion, and Conwy.
Holyhead coastguard said its crews its are to take 10 nurses who live on Anglesey to Ysbyty Gwynedd on Wednesday.
North Wales Fire and Rescue Service are advising people to take extra care when using heaters to prevent pipes in sheds and other outbuildings from bursting in the current freezing temperatures.
Crews were called to incidents on Anglesey owhere a blower heater and bar heater being used to stop pipes freezing resulted in the outbuildings catching fire.
Royal Mail said two Gwynedd postcodes, LL55 and LL54, will have vehicles outside post offices between 1000 GMT and 1400 GMT for people to pick up parcels.
Vans will go to the villages of Bethel, Llanrug, Deiniolen, Llanberis, Cwm-y-glo, Bontnewydd, Groeslon and Penygroes.
Vehicles will also be stationed at Llandwrog, Maesincla, Lonybryn and Hendre post offices. Royal Mail said callers may be asked for identification.
A St John 4×4 ambulance clearing roads in the Claerwen Valley The Welsh Local Government Association (WLGA) says, in all, Wales only has 12,000 tonnes in reserve with four or five days of grit left before more supplies were due to arrive.
Anglesey council has warned it has just 20% of its grit stock left, down to 700 tonnes from 3,800 tonnes in October.
Conwy had 10,500 tonnes of grit before the start of the winter season but that now stands at 4,500 tonnes, including an extra 130 tonnes which was delivered on Tuesday.
Gwynedd council said it had six days of supplies left – or two days if it had further snowy conditions.
WLGA bosses want Welsh ministers to ask the UK Government to release some of the 150,000 tonnes of grit English councils have in reserve.
An assembly spokesperson said they were in close contact with the WLGA and the UK Government’s Department of Transport to review the distribution of salt and “ensure that Wales receives adequate supplies”.
Volunteer crews from St John Ambulance Wales are using 13 specialist 4×4 vehicles to get to places deemed inaccessible for normal road ambulances.
They are on standby, responding to calls from Welsh Ambulances Service NHS Trust.
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