Drivers are being advised to take extra care on the roads as Storm Gareth approaches Ireland.
Gusts of up to 130 km/h are forecast in the north-west, and there's also a risk of coastal flooding.
A status orange wind warning comes into effect for Donegal, Leitrim, Mayo and Sligo from midday today until 9am tomorrow.
Becoming extremely windy today, with a mix of bright spells & scattered heavy & thundery showers, some of hail, with sleet over high ground. Very strong westerly winds developing countrywide, reaching gale force in the NW & N, with severe and damaging gusts. Highs 6 to 9 Celsius. pic.twitter.com/VZDwVlB1Pv
— Met Éireann (@MetEireann) March 12, 2019
A lower-level status yellow wind warning has been issued for the rest of the country, and is valid for 24 hours from 12pm today.
Met Éireann meteorologist Vincent O'Shea explained: "The strongest of the winds will be expected later this afternoon and evening.
"[The winds will] continue across Ulster, north Leinster and a lot of Connacht for much of tonight. Even in the Dublin area it will be a very blustery night."
The Road Safety Authority's Brian Farrell said flooded roads are a very real danger.
He advised motorists: "Don't drive through it - it could be deeper than you think.
"We don't want to have a situation where people get stranded in flooded roads."
He also encouraged people to check what the local traffic and weather conditions are like before setting out.
Road users are also being told to be aware of the risk of objects being blown out onto the road, and to watch out for fallen debris.
