This is on top of the wind warning already issued for three counties in Munster.
Met Éireann has issued a status yellow rainfall warning for Dublin, Louth, Wicklow and Meath ahead of anticipated heavy downpours on Wednesday night and into Thursday morning.
The warning takes effect at 1am on Thursday morning and will remain in place until 2pm that day.
Met Éireann has warned that the downpours may lead to river flooding and spot flooding in places.
The warning comes after a status yellow wind warning was issued for Cork, Kerry and Clare earlier on Wednesday, a warning which comes into effect at 11pm tonight and will remain in place until 12pm on Thursday.
Southerly winds veering west to northwest are expected to reach mean speeds of 55 to 65km/h while the warning is in effect, with gusts of 90 to 110km/h, highest in coastal areas and on exposed hills and mountains.
Given the time of year, with many trees in full leaf, there is also greater potential for wind related impacts, Met Éireann has warned.
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