Valentine's Day weather warnings in place for N Ireland
Rain and snow disrupt travel across Northern Ireland
(about 20 hours later)
The Met Office has issued two severe weather warnings for Northern Ireland for Friday, with further travel disruption anticipated.
Police have appealed to drivers across Northern Ireland to take extra care due to the adverse weather conditions.
The yellow warnings come ahead of rain and snow in some counties.
Drivers are advised to slow down, use dipped headlights and keep a safe distance from the vehicle in front.
It is the latest in a series of storms since December, that have often made driving conditions difficult.
The Glenshane Pass in County Londonderry is passable with extreme care.
The rain warning will affect Antrim, Down and Belfast and snow is being forecast for the north and west.
Lower Rashee Road in Ballyclare is closed and drivers are advised to seek alternative routes.
The Roads Service said: "Temperatures are reported to be falling sooner than previously forecast, resulting in the possibility of icy conditions.
Windyhill Road from Coleraine to Limavady has not been gritted. Drivers are advised to use Dunhill Road which is "passable with care".
"Roads have been, and will be salted overnight and into tomorrow morning. Drivers should be aware of the risk of icy conditions and exercise caution."
Translink said the bad weather had caused its Great Victoria Street to Larne train service to terminate at Whitehead.
BBC NI weather presenter Barra Best said: "The bulk of the sleet and snow is expected to fall over high ground, hills and mountains.
In Belfast, Friday night's rugby match between Ulster and Scarlets was postponed after referee Leighton Hodges deemed the Ravenhill pitch unplayable.
"But don't be surprised if we get some wintry weather to lower levels as well.
Ulster said in a statement: "The two teams are now exploring the possibility of playing the game tomorrow at Ravenhill.
"It will be quite an unpleasant day, when you factor in the winds, rain, sleet and snow.
"A further update will be issued as soon as possible."
High winds
Heavy rain in the Limavady and Magilligan areas of Londonderry has resulted in stretches of road being covered in surface water.
"Further areas of low pressure are due next week but they are not expected to bring winds as strong or the heavy rain we have seen over the past few weeks."
The Longshot Road, Ballyclare, is closed. Diversions are in place at the Templepatrick Road roundabout and the Ballypalady Road.
Weather warnings are also in place in parts of Britain with a new band of heavy rain expected on Friday.
Very high winds are forecast for Friday evening and Saturday morning.
Meanwhile, Met Éireann has issued a snow and ice warning for parts of the Republic of Ireland.
The Electricity Supply Board has said tens of thousands of homes and businesses in the republic will remain without power overnight on Thursday.
ESB staff are being assisted by colleagues in Northern Ireland to try to reconnect customers.
