The weather warning has been upgraded to amber for parts of Northern Ireland as Storm Bram hits.
The Met Office says strong winds are expected from 2pm to 7pm.
It says a spell of extremely strong winds associated with Storm Bram may lead to significant disruption.
Power cuts could occur and affect other services, such as mobile phone coverage.
Damage to buildings and homes is possible, with roofs blown off and power lines brought down.
Roads, bridges and railway lines may close, with delays and cancellations to bus, train, ferry services and flights.
Flying debris could result in a danger to life