Up to 13 counties have been issued with a rain warning.
A status-yellow rain warning is in effect from 6am Friday 9 November, with ‘heavy rain’ forecast by Met Éireann.
Counties affected include Dublin, Carlow, Kilkenny, Kildare, Louth, Wexford, Wicklow, Galway, Mayo, Cork, Kerry, Tipperary and Waterford.
The weather warning is in place for 12 hours and Met Éireann has warned of heavy rain, with accumulations of between 25mm and 40mm.
They’ve added that rainfall may exceed this prediction in mountainous areas.
Met Éireann has also issued a status-yellow rain warning for Munster and Connacht, which will be in effect from 4am on Friday morning until 3pm the same day.
Southwesterly winds will reach 50km/hr to 60km/hr and gusts could reach up to 110km/hr.
A separate wind warning is in place for Leinster, Cavan, Monaghan and Donegal, where gusts of up to 110km/hr are also expected.
However, Met Éireann has added the proviso that gust speeds are likely to reach even higher speeds along coastal regions.
The UK Met Office also has a rain warning in place for Northern Ireland on Friday, with heavy rain expected across Ulster.
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