Met Eireann has issued a Status Orange Thunderstorm warning for Ireland.
Thunderstorm activity is expected. However, due to the sporadic nature of development, not all areas will be affected.
Heavy downpours of rain and hail will occur in places, with the possibility of flooding.
The warning will come into effect at 3pm Sunday and will remain in place until 9am Monday.
Meanwhile, it will be another hot day, especially in Munster and south Leinster, with temperatures generally reaching between 24 to 30 degrees, cooler though in the northwest with temperatures in the low twenties.
Winds will be light northerly or variable but sea breezes will develop along coasts. While a few isolated heavy showers or thunderstorms may develop throughout the day, they will gradually increase in coverage through the late afternoon and evening. The most intense downpours, will cause some flooding, and intense lightning and hail.
Scattered heavy showers and thunderstorms will continue overnight and at times merging to longer spells of rain, with further downpours and spot flooding possible. Remaining warm and humid with lows of 13 to 17 degrees with light northerly or variable winds.
On Monday scattered showers and thunderstorms will continue to affect the southern half of the country mostly, becoming intense through the afternoon with the continued risk of flooding. It will be fresher, but drier further north with just isolated showers and intermittent sunny spells.
Highest temperatures will return closer to average, ranging from 15 to 17 degrees in the north and northwest to between 17 and 23 degrees elsewhere. Light to moderate northerly winds will increase fresh to strong along Atlantic coasts.
Showers will gradually die out on Tuesday in the south to leave a mostly dry night with clear spells. Lowest temperatures of 10 to 15 degrees, remaining warmest near the east coast in a moderate northerly breeze, fresh at times near northward facing coasts.
A dry night with a mix of cloud and clear spells. Lowest temperatures of 8 to 13 degrees in moderate northerly breezes.
Wednesday will be a dry day with a mix of cloud and sunny spells in the morning and widespread hazy sunshine developing in the afternoon. Highest temperatures of 15 to 20 degrees, warmest along the south coast in mostly light northwesterly breezes.
Clear spells early in the night, cloud will increase from the west with rain spreading into Atlantic coastal counties towards morning.
Lowest temperatures of 8 to 14 degrees, mildest in the west, as light westerly breezes back southerly through the night.
Thursday will see a band of rain, which may turn heavy at times, cross the country through the morning, followed by scattered showers through the afternoon, clearing to more widespread sunny spells in the west through the evening. Highest temperatures of 16 to 22, warmest in Munster, with moderate southerly breezes veering westerly through the afternoon.
While confidence is still quite low towards next weekend, current indications suggest it will turn milder and more settled for a time.
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