"Storm Callum" is the third storm of the 2018/19 season, with the strongest winds likely to hit western Ireland, although North Western parts of the United Kingdom can expect severe gales.
Hundreds of homes and businesses are also without power, and 20,000 properties were without power in Ireland.
The high winds, combined with heavy rain, could see leaves and other debris blocking drains, making flooding more likely.
Met Éireann said the strong winds will continue for the morning, with the Status Orange warnings for Storm Callum remaining in place until 5pm for northwestern coastal areas. "Later in the night, the next spell of heavy rain will move into central and southern parts of England and Wales".
The Met Office has warned heavy rainfall moving in from the South West issued a 36-hour amber warning for Wales.
ESB Networks announced that 30,000 homes were left without power.
The Met Office said some delays were likely to road, rail, air and ferry transport and that short term loss of power was possible in the Friday alert which lasts till midnight.
While Storm Callum causes chaos in most parts of the country, patches in the South East will be enjoying a balmy Saturday with highs of 78F expected in London.
The Warningsford Road, Banbridge is partially closed due to fallen trees, while there are also reports of a fallen tree on the Hillsborough Road, Monyreagh.
Yellow Met Office warnings are in place for wind and rain in the Highlands and Islands and Strathclyde areas throughout Friday.
The Brecon Beacons village of Libanus, has already recorded 182mm of rain in just 48 hours - way above the region's monthly total of 169mm.
The Environment Agency has issued four severe flood warnings across the south coast of England as well as 28 flood alerts.
Windsor, the scene of Friday's royal wedding, was expected to escape the worst of the storm.