A zone of heavy rain associated with an intense weather system affecting western parts of the United Kingdom will become slow moving for a time, bringing prolonged rainfall and the potential for surface water flooding.
Gusts in excess of 110km/h were recorded, but no major incidents have yet been reported.
Thousands of homes were left without power, and the storm lead to school and business closures and one fatality.
A yellow weather warning is in place in those areas - and parts of northern and south western England as well as some of Scotland - while a higher amber alert is in force for Wales.
Meteorologist with Met Eireann, Joanna Donnelly, says people need to take this storm seriously.
Ms Donnelly said the storm is 350km off the west coast and is tracking north. "Gusts of 100 to 130 km/h are forecast across each county, with the strongest coasts along exposed coasts", forecasters said.
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In Co Armagh, Trafficwatch NI reports that a the Tassagh Road, Keady is blocked by a downed tree, as is the Summerisland Road, Moy, the Kingsmill Road, Whitecross and the Loughgall Road, Portadown is partially closed due to fallen trees.
Services between Bray-Greystones and Howth-Howth Junction have resumed after earlier disruption.
The storm is wreaking havoc on travel arrangements, with certain flights being canceled on Friday morning at Cardiff and Exeter airports.
This afternoon's Irish Ferries sailing from Dublin to Cherbourg has been put back until tomorrow.
The forecasters "danger to life" yellow warning on Saturday is for rain that could results in flooding to homes and businesses, causing damage to some buildings. As the flooding continues and emergency services work to control the situation one local business in Crickhowell rallied around to help neighbours affected by rising water levels.
Richard Brown, Pembrokeshire County Council's Head of Environmental Services and Public Protection, said that although Council staff would be working continuously to clear the roads, motorists would need to be vigilant.