Met Éireann has updated its rainfall warning, issued yesterday, for the west and northwest of the country.
Forecasters say that heavy rain, with accumulations of 40-50mm, will result in localised flooding in Connacht, as well as Co Donegal.
The Status Yellow rainfall warning is valid until 3pm tomorrow.
A Status Yellow wind warning has been issued for counties Donegal, Mayo, Galway and Kerry.
South to southwest winds of 50-65km/h are forecast, with gusts of 90-110km/h.
Winds will be strongest on exposed coasts and hills. High seas and gales will combine to give a risk of coastal flooding.
The wind warning is in place until 11am tomorrow.
Meanwhile, Met Éireann has said that Ireland is heading into a period of "very unsettled weather".
It says further warnings for strong winds and rainfall are likely to be issued in the coming days, adding that "a combination of spring tides and gales may lead to coastal flooding at times".
Weather Advisory for Ireland— Met Éireann (@MetEireann) January 10, 2020
Valid from 00:01 Mon, 13-Jan-2020
Valid until 23:59 Thu, 16-Jan-2020 pic.twitter.com/3aIGLxme3h