Heavy rainfall of between 30 and 50 millimetres is expected in Waterford today as well as Cork and Kerry.
Met Eireann is also putting out a second alert for up to 30 millimetres of rain in Kilkenny, Wexford, Clare, Limerick and Tipperary.
WEATHER FORECAST – Today
Widespread persistent or heavy rain this morning with blustery southeast winds and spot flooding, especially in Munster.
This afternoon, rain will gradually clear northwards.
Heavy showers will follow over the western half of the country with strong, gusty southerly winds and a risk of thunder.
Highest temperatures of 10 to 12 degrees.
Early tonight, showers will continue for a time in the west and north, but will mostly die out.
South to southwest winds will ease and will fall of light. It will mainly dry overnight with clear spells.
Fog will develop and may become dense in places, especially in the south.
Lowest temperatures of 3 to 6 degrees.