I've classed this as moderate as it takes little to cause a flood in this country!
Ripped from met.ie
Rain will spread steadily northwards to all parts tomorrow, Wednesday, turning heavy in places, with extensive hill and coastal fog forming. However, some dry intervals may develop in inland parts of the south later. Winds will be light to moderate, easterly for a time, but it will become breezy everywhere by the end of the day, with moderate to fresh southerly winds developing. Very mild and humid; highest temperatures 17 to 21 degrees Celsius.
Wednesday night will be wet and windy with widespread rain. A very mild and close night with lows of 13 to 17 degrees.
Thursday will be a very wet day with heavy falls of rain for much of the country. The rain will lead to localised flooding and will last throughout the day. It will gradually clear away to the east overnight on Thursday. Highs of 18 to 21 degrees are expected and it will remain mild overnight with lows of 12 to 14 degrees.