High winds have affected flights at Dublin Airport, where a combination of European and domestic flights into the airport were cancelled this morning. Two other flights were diverted to Shannon Airport.
Aer Arann, Aer Lingus and Ryanair flights have been most affected by the weather.
Flights between between Donegal and the Isle of Man were all cancelled, but flights to and from Ireland West Airport in Knock operated.
Elsewhere, flights to and from Cork Airport are operating to schedule. However, an earlier Ryanair flight from Stansted to Cork was diverted to Shannon and the return leg of that flight was also cancelled.
The adverse conditions could result in knock-on delays into tonight.
The M1 motorway was closed for a time this morning, after the winds blew over a lorry on the flyover near Dublin Airport.
All Irish Ferries Swift sailings have been cancelled, but passengers will be accommodated on other services.
Northern Ireland Electricity say less than 1,000 customers are still without supplies following the severe gale force winds.
These caused damage to the electricity network in Northern Ireland throughout the day. The company says most of the remaining damage is in Newry city and the surrounding area.
It expects all customers will have their supplies restored tonight.
Emergency crews have been working since early morning to repair the damage caused by flying debris and high winds, including broken electricity lines and damage to poles and other equipment.
The bad weather also affected power supplies to some areas in the south. ESB crews have restored power to several thousand customers in Kilkenny city, as well as to areas of Drogheda and Dundalk in Co Louth.
Sligo's biggest boys' secondary school has closed for the day because it was deemed to be unsafe for pupils and staff given the very high winds.
There are 700 pupils in Summerhill College but Principal Michael Murphy said once people arrived at school this morning it was clear that conditions were dangerous.
'People were being blown around the place, doors and windows were being blown fiercely,' he said. Mr Murphy added that is a problem with a roof in an older part of the school.
Plans are currently being drawn up for a new school at Summerhill which it is hoped will be open by September 2009.
AA Roadwatch has reported that stormy conditions overnight resulted in a lot of surface water and debris on roads around the country this morning.
It has advised motorists to drive with extreme care as there is a large number of trees down on roads nationwide.
