Dublin is expected to escape the worst of ex Hurricane Lorenzo.
A yellow warning for wind and rain is in now in place for the entire country, including Dublin.
Galway, Mayo, Clare, Kerry and Limerick are expected to be worst hit by Lorenzo.
An orange storm warning will come into force for those counties from 6pm.
Our warnings for #Lorenzo have been issued.
All warnings can be viewed here:https://t.co/ozrQHtoOkt
An explanation of our warning levels can be found here:https://t.co/Cr9ukyJgun
Our Meteorologist's Commentary has been updated and can be viewed here:https://t.co/ktXtWjbfIg pic.twitter.com/QhemlD7hX5
— Met Éireann (@MetEireann) October 2, 2019
By the time Lorenzo reaches Ireland, it's expected to bring heavy rain, strong winds and high seas.
People are being warned to stay away from coastal areas for the duration of the weather alerts.
Derek Flanagan, from the Irish Coastguard, said "we are advising members of the public to give a wide berth to areas of the coast".
"Our message to them is simple: stay back, stay high and stay dry", he said.
Irish Airports are advising passengers travelling over the next few days to check the status of their flight with airlines.
Cork Airport says strong winds may lead to disruptions, while Dublin Airport says it's too early to tell if its flights will be affected.
Ireland West Airport says most of its schedule will be completed before an Orange wind warning comes into effect.
Shannon says it is monitoring conditions, and will update passengers on any potential impacts.
The Housing Minister expects the storm will have "a significant impact" on some coastal areas.
Eoghan Murphy said "people will really need to keep an eye on those localised alerts" for updates.
High winds, some flooding and power outages are expected late on Thursday, into Friday morning.