Met Eireann say that Storm Ciara will continue to produce very strong west to southwest winds over Ireland with mean speeds of 50-65km/h and gusts generally of between 90 and 110km/h, higher in Atlantic coastal areas.
A "danger to life" warning has been issued by the Met Office - as the warning for Storm Ciara was upgraded from Yellow to Amber.
Named by the Met Office on Wednesday, Storm Ciara is now tracking eastwards towards the United Kingdom and Ireland.
There is a a Status Yellow Wind Warning now in place for Ireland.
Yellow weather warnings cover the whole United Kingdom with the heaviest rain expected over high ground, where 50-70mm is expected widely with as much as 100mm in a few locations.
Trains will be restricted to 50mph on Sunday as high winds are forecast.
Storm approaching Europe causes flight disruptions
Wednesday is likely to be clearer with patchy sunshine, although there may still be some wintry showers and ice to contend with.
Forecasters warned there could be delays and cancellations to air, ferry and train services, damage to buildings and a chance of power cuts caused by wild weather conditions.
Network Rail and Transport for Wales have issued joint information ahead of Storm Ciara.
Network Rail, which manages the country's railways, said there was disruption across its network, with fallen power lines, trees and even trampolines blocking tracks, and warned people not to travel unless they had to. Heavy rain will accompany the strong winds leading to very poor driving conditions.
STORM CIARA is giving Britain a battering today with winds of up to 8mph expected - but along with the gales and heavy rain, some have also seen lightning in parts of the UK. A low of 5C.
Gusts of 86 miles per hour were recorded in Capel Curig, in North Wales, at midnight, while the Isle of White saw 81mph winds on Sunday morning, while Cumbria saw 151.8mm of rain in 24 hours. Drier at times in the afternoon but still with heavy showers.