Belfast’s largest shopping complex, Victoria Square, was plunged into darkness for a time on Friday evening
A network fault meant 200,000 homes in Belfast were without power for a time on Friday evening.
Northern Ireland Electricity (NIE) said the blackout was caused by an issue with the high voltage transmission network.
NIE is still working to restore power to 40,000 customers in Northern Ireland who had lost supply as a result of the bad weather.
Most of the properties affected outside Belfast are in Counties Down and Antrim.
NIE said it had restored power to 100,000 customers in Northern Ireland following the overnight snow storm.
More than 70 schools were closed on Friday.
Roads are closed and airports have been affected.
Police are advising motorists not to travel on roads affected by snow unless absolutely necessary.
George Best Belfast City Airport had to close twice to allow for snow clearing and de-icing.
“Atrocious weather conditions , including drifting snow, have made access very difficult and the high winds, combined with snow and icing, are still causing damage to the network.
“The severe weather is set to continue through tonight and into Saturday and we are likely to see further damage to the network which will affect electricity supplies.”
Motorists in Rostrevor and Warrenpoint are asked to take extra care due to flooding in the area.
Source: BBC News