A Status Orange weather warning has been issued for three counties, as Storm Erik is set to hit with winds gusts of up to 130km/h.
An Orange wind warning is in place for Galway and Mayo, with Met Éireann warning of "severe and damaging" gusts of up to 130km/h.
It warned of high seas and coastal flooding, with highest winds will be in exposed coastal areas.
The warning is valid from 5am tomorrow morning until 1pm tomorrow afternoon.
An Orange wind warning is also in place for Co Donegal, valid from 9am tomorrow until 6am on Saturday.
A Status Yellow wind warning has been issued for the rest of the country, with gusts of up to 110km/h expected.
The Road Safety Authority has advised road users to exercise caution on roads while the warnings are in place.
It has asked motorists to check traffic conditions and to expect the unexpected, and advises pedestrians and cyclists to wear bright clothing and take care on roads.
A status yellow rainfall warning has also been issued for Donegal, Galway, Mayo and Kerry.
Met Éireann said as much as 30 to 40mm of rainfall is expected with a risk of spot flooding especially in coastal areas.
The warning will come into operation from midnight tonight until midnight tomorrow.
Wind Warnings issued for Storm Erik— Met Éireann (@MetEireann) February 7, 2019
Status Orange: for Donegal, Galway & Mayo.
Gusts to 130 km/h
Status Yellow: for all areas
Gusts to 110 km/h
Valid from Friday 5am (Validity times vary).https://t.co/ozrQHtoOkt #StormErik pic.twitter.com/5H6TVe57QZ
Galway City Council crews will be on stand-by and will be mobilised, if necessary, to deal with localised flooding that may occur due to heavy rainfall. The public is urged to exercise caution out and about throughout Friday particularly on exposed shores.— Galway City Council (@GalwayCityCo) February 7, 2019