Main Points:
• Motorists warned of dangerous driving conditions
• Bus Éireann services mostly operating as normal (see below)
• Iarnród Éireann services continuing, M3 Parkway to Clonsilla service remains suspended.
• Dublin Bus says last buses at 9pm
• Luas operating normally
• Dublin Airport is fully operational
• Submit your comments (click on comments tab above)
• Send your weather pics to yourphotos@rte.ie for use on RTÉ.ie and RTÉ News Now

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Regional weather round-up

2300 That's it for our live updates for tonight. Avoid any unnecessary journeys, and drive carefully if you have to travel.

2214 AA Roadwatch says road temperatures are below zero, with heavy freezing fog in many areas across the country adding to the already very poor conditions

Gardaí advise against driving on N5 Westport to Swinford Rd and N26 Castlebar the Ballina Rd in Mayo due to black ice´.

Extreme caution advised on all routes around Sligo, with heavy fog & black ice. In Leinster, road conditions are treacherous on N51 Navan to Athboy Rd. Take care on M3 Dublin to Cavan Rd between J6 Dunshaughlin and J9 Navan due to black ice.

It's a similar picture across the country, so don't make any unnecessary journeys.

2204 Don't blame the messenger, but the latest update from Met Éireann does not paint a pretty picture.

(I'm wearing fingerless mittens as I write this) There will be widespread ice and locally dense freezing fog with temperatures falling to between -4 and -9 C generally. Outbreaks of rain and sleet will spread to northern and western parts of Ulster and Connaught and will freeze on contact with surfaces, adding to the ice hazard.

The freezing fog will be slow to clear tomorrow, and rain, sleet and snow will spread gradually southeastwards. Temperatures a balmy -1 to 3C generally.

2159 Institute of Technology Tallaght will re-open tomorrow (Mon), but public transport is your only option as there will be no parking on campus due to snow.

2041 Bus Éireann have said school closures combined with weather and road conditions, particularly on secondary and minor roads, are also likely to result in some disruption to school transport services in affected areas tomorrow morning.

Bus Éireann local inspectors in consultation with local schools will assess the situation in each area of the country tomorrow morning.

Road passenger services are being curtailed in many parts this evening.

2013 Sligo County Council have said freezing temperatures have left Sligo's roads in a very dangerous condition, including the treated national primary routes, with black ice on many roads.

1948 Donegal County Council is appealing to the widespread public to refrain from travelling if at all possible over the coming days.

They have further advised that where travel cannot be avoided, a much reduced speed should be used and increased care taken, as motorists can expect black ice and treacherous conditions, even where roads have been treated.

They have asked drivers not assume that roads are gritted or ice-free, and to stay a safe distance from other traffic.

1854 The recent snow has affected blood supplies according to the Irish Blood Transfusion Board.

Today, donors attended clinics to rebuild stocks ahead of Christmas and the New Year.

People that wish to donate blood over the coming weeks should log onto www.giveblood.ie.

1847 In a message to the public Gardaí are asking motorists to continue to exercise extreme caution on the roads over the coming days.

'With snow beginning to thaw and below zero temperatures black ice and freezing fog is posing a serious challenge to the motoring public. Ice, although not as visible can snow, makes driving conditions particularly dangerous as it does not provide the same warning as snow and motorists may not be driving at an appropriately slow speed.

'Weather and motoring conditions vary across the country and local and minor roads continue to be particularly hazardous.

'Surfaces and driving conditions on national routes differ greatly to those being experienced on minor routes and motorists are again advised to adjust their speed appropriate to the prevailing conditions.

'Unnecessary journeys should not be undertaken. Drivers should be conscious of the safety of pedestrians. Pedestrians should avoid walking on the road and wear hi-visibility jackets. Current indications are that below zero temperatures are again expected over night.

'Gardaí are also reminding people to be mindful of people living alone and call in on vulnerable people. Don’t presume someone else will do it.'

1813 Iarnród Éireann say full services are operating throughout the network across Intercity, DART and Commuter routes this evening except M3 Parkway to Clonsilla which are suspended due to points problems.

However, it says M3 Parkway to Clonsilla will reopen from first service tomorrow morning.

1749 The water situation is still critical throughout West Cork and consumers are asked to search for and eliminate leaks on all water supplies.

Water will be off overnight in Bantry High Level serving higher areas in Bantry, Ballylickey, Snave, Gurteen, Rooska and Gortacloona from around 10pm to 8am (Mon) to build up reservoir levels.

1746 Bus Éireann is curtailing services in the east of the country due to poor road conditions.

Road passenger services curtailed this evening include:

Route 100X Dundalk Drogheda Dublin – Last bus 19:30 from Dundalk to Dublin. Last bus 22:00 from Dublin to Dundalk, from Custom House Quay.

Route 101 Drogheda Dublin – Last bus 17:30 from Drogheda to Dublin. Last bus 19:00 from Dublin to Drogheda.

Route 177 Monaghan Dublin – via M1 from Ardee, not serving Collon, Slane or Ashbourne.

1724 NASA has released a very impressive photograph of Ireland taken last Thursday, when it was firmly trapped in the cold snap's icy, snowy grip. You might be pleased to know the good folks in NASA refer to us as 'The green gem of northwestern Europe'.

1700 Latest update from Met Éireann: Continuing very cold this afternoon with freezing fog persisting in places, otherwise mostly dry with bright or sunny spells and just a few wintry showers affecting northern and western coastal counties. Highest temperatures just 0 to 5C degrees, coldest where fog lingers.

Bitterly cold again this evening and tonight. Widespread dense and freezing fog with a widespread severe frost will make for extremely hazardous driving conditions countrywide.

Mostly dry overnight but outbreaks of rain or sleet will develop in northern and northwestern coastal areas late in the night and turn to snow in inland parts of Ulster and north Connacht in the early morning. Lowest temperatures -4C to -9C.

1656 Dun Laoghaire Institute of Art Design and Technology campus will reopen at 8am tomorrow. The campus remains under a layer of snow and ice and due care is advised when driving and walking on campus.

1652 Dublin Bus says due to the adverse weather conditions there are curtailments to a number of bus routes.

Taking account of the weather forecast for tonight for severe frost and freezing fog, last buses will operate at 9pm tonight both from the city centre and the suburbs.

Customers should check www.dublinbus.ie or www.transport.ie in the morning for updates on services.

1625 You can now watch the Severe Weather Co-ordination Committee's briefing here

1515 Word from a passenger is that the 3pm Dublin-Cork train is absolutely jammers. Lots of people opting for the train over the car this weekend, sure if nothing else at least it's good for the environment!

1503 Off home for me Sunday dinner but never fear some other lovely people are taking over for the rest of the day. Stay safe!

1436 Things seem to be getting quiet out there, will take that as good news so. Why not check out our ever-growing photo gallery.

1425 The 1300 Enterprise Connolly to Central train is 53 mins delayed this is due to a broken down train.

1356 Meath County Council is continuing to reduce water pressure in areas of Navan and asks people to conserve water for essential purposes.

Army personnel are assisting Council staff today with snow clearance in Navan, Enfield and Ashbourne.

1320 Westmeath County Council is appealing to people to conserve water, adding that it is 'making every effort to maintain an uninterrupted water supply to all its customers'.

The local authority says that the current severe weather is making it difficult to repair leaks, and is also slowing the output of treated water from the water plants.

1258 The Severe Weather Co-ordination Committee has warned inappropriate driving is now the biggest problem on Ireland's roads.

The Committee warned ice is now causing a major hazard and people are 'driving way too fast'.

The Committee appealed for people to exercise extreme caution on footpaths also.

They say there has been a huge effort by communities across Ireland to clear footpaths and housing estates and this had led to a dramatic reduction in injuries being reported to hospitals.

The NRA say salt supplies are being maintained and 28,000 tonnes are still available.

All major transport operators say services are operating with minor disruptions.

Met Éireann say the severe cold temperatures should ease towards the end of this week.

1250 In Galway city, some houses in Knocknacara, Salthill, Rahoon, and Claremont currently have no water supply because of reduced water pressure.

This is because of 'exceptionally high demand on water from the Clifton Hill resevoir to the west of the city since Friday', according to a spokesman for Galway City Council.

1233 Westmeath County Council says regional roads are passable with extreme care. Due to the severe overnight frost, patches of black ice may persist on all roads.

1227 South Dublin County Council has urged caution due to localised fog on roads. SDCC traffic camera network can be viewed at http://bit.ly/f0ibi3

1226 Wexford County Council reports that traffic is moving well on the N11 and other main roads, snow has been cleared from many footpaths around towns but they are icy from melt waters.

1053 Saw a very interesting BBC report today on people who live in Siberia. It's so cold that when the reporter threw a glass of water into the air it instantly turned to snow as it fell to the ground!!

But on the bright side they do have gold mines, which is why people continue to live there.

1050 A jack-knifed truck has been cleared to the side of road at Bruckless between Donegal town and Killybegs off the N56.

1034 AA Roadwatch says it is treacherous on N7/Naas Rd particularly outbound from Newlands Cross to J3 Citywest. Drive with extreme care.

1033 Galway, Knock and Kerry airports operating as normal.

1021 Today's photo gallery is available to view. Some great photographers out there.

1000 Representatives of national agencies will give a briefing update on the severe weather situation at midday in Dublin.

0948 Many homes in Galway city are without water. Galway City Council says emergency teams are trying to remedy this, but water supplies might not be restored until this evening.

The areas most affected are Knocknacara, Salthill, Rahoon, and Claremont, which currently have no water supply.

0932 Gardaí say the N7 and N9 are hazardous this morning due to freezing conditions.

0930 Report from Eileen Magnier, North West Correspondent: Roads and footpaths around Sligo town are dangerous this morning after another night of severe frost.

The town centre's streets are passable with care but Sligo County Council is warning that hilly areas of the town are difficult especially Gallows Hill, Cairns Road, Cleveragh, Churchill and the Riverside area.

0923 My taxi driver's advice is to clear the snow from the paths outside your house right after the snow has fallen as it's at its lightest. He says that's what they do in Holland. Will remember that for next time to avoid back-breaking work that I did yesterday!

0921 South Dublin County Council says all main roads are passable this morning. Temperatures below 0C in most places so icy conditions remain. Drive carefully.

0920 AARoadwatch has advice on how to drive in snowy conditions.

0850 Kerry County Council advises extreme caution on roads in west Kerry. Black ice on some roads and driving conditions are poor

0850 Road temperatures remain at around -4C in parts of Monaghan, Louth, Wicklow, Laois, Limerick, Clare , and in Killarney and are at -7 or -8C in parts of Meath, Westmeath, Cavan and Longford, according to the NRA.

0846 Kerry County Council is reporting that N70 Mountain Stage to Foilmore is slippery. Road crews treating it at the moment. Waterville road slippery, as are local roads in South Kerry.

0835 Bus Éireann says that passenger services currently affected by weather and road conditions this morning include some services in the east and north east:

Route 108: Dublin/Bailieboro – Operating to Kells Only

Route 109A: Navan/DCU – Service not operating via Ashbourne & Ratoath

Route 111: Dublin/Athboy – Operating not serving Delvin

Route 133: Dublin/Wicklow – Operating, not serving 'Leg of Mutton',

Route 100 Dundalk Drogheda – not serving Monasterboice.

Route 188 Drogheda Trim – Cancelled.

Route 190 Drogheda Laytown – Cancelled.

Route 70 Dundalk Athlone – Sunday 15:30 Ex Dundalk to Athlone cancelled.

Route 70 Athlone Dundalk – Sunday 19:45 Ex Athlone to Dundalk cancelled.

Route 174 Dundalk Town Service - Not serving Marian Park

Route 174 Dundalk Town Service - Not serving Coxes Demesne

0830 The Chapelizod bypass has reopened.

A portion of the inbound stretch had been closed following a collision earlier.

0739 Dublin, Shannon and Cork airports are fully operational.

0727 People are being urged to give blood to boost supplies during the cold weather.

The Irish Blood Transfusion Service is holding six extra blood donation clinics around the country today - in Cork, Dublin, Dundalk, Limerick and Carlow.

It is hoping to collect about 800 units of blood, in order to avoid any cancellations of elective surgery this week.

0718 Mayo County Council says gritter is having difficulties in some areas. Icy conditions on N5 outside Castlebar around Pontoon, Swinford, Bangor, Foxford Kilkelly

0715 Dear Santa, here is my revised gift list: snow boots, snow shovel, tyre snow socks.

0700 Motorists are again being warned of dangerous driving conditions after another night of sub-zero temperatures and freezing fog.

In Dublin, the Chapelizod bypass has been closed inbound until further notice and traffic diversions are in place.

The Sally Gap and Wicklow Gap are closed.

Extreme care is also advised on the M4 westbound around Junction 7 in Maynooth.

Iarnród Éireann says it expects services to continue operating across Intercity, DART and commuter routes.

However, the M3 Parkway to Clonsilla service remains suspended.

Most Bus Éireann services are due to operate as normal with just some delays and diversions.

Dublin Bus says there will be some curtailments to its services today and customers will find all the details at www.dublinbus.ie.

Meanwhile, Cork County Council say there has been an interruption to the water supply in the west of the county overnight.

Consumers served by the Bantry High Level and Froe Reservoirs are being urged to conserve water until at least half past eight this morning.

And now the weather... Frost and freezing fog will linger in some Midland areas. Otherwise, sunny spells and dry apart from a wintry showers on western and northern coasts. Highest temperatures of 3 to 5C but close to or below freezing where fog persists.

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