Storm Ophelia is to hit the UK and Ireland with winds of up to 80mph.
The Met Office is warning of a potential “danger to life”, and fears of the impact of strong winds have seen troops on standby and public services in Ireland closed.
The storm, which was formerly classed as a hurricane, is to hit today (October 16), on the 30-year anniversary of the 1987 Great Storm.
Schools and colleges in Northern Ireland have been closed under an amber weather warning – issued when forecasters say people need to be prepared to protect themselves from severe weather and other risks caused by it, like flying debris.
Meanwhile, a yellow warning is in place across Scotland, Wales, the north-east, west and south west of England, as well as the Midlands.
The Irish weather board, Met Eireann, has released a “status red” alert for the counties of Mayo, Clare, Kerry, Cork, and Galway.