On Thursday an area of instability will approach the country from the south after some very warm and humid air embeds itself over the country. Incidentally this brings nice beach and garden weather at times with temperatures in to the mid twenties but also the real threat of some potentially severe storms.
The main focus of concern is Thursday night and Friday morning. This is the period that we could see some severe weather originating in the Bay of Biscay and driving north toward Ireland with focus of attention the south coast but even more so the southeast and east though in reality all areas are at risk.
This will probably materialise and at this point flash flooding is likely so it's something to be aware of. Frequent lightning and some hail is also possible but the hail is more likely during the weekend in western and midland areas. Rainfall totals could mount quickly in downpours.
Having seen the main action through on Thursday night and Friday the focus turns inland for the weekend were thunderstorms should develop when convection gets going during daylight. Though different in origin and homegrown so to speak these could conceivably be unusually large and intense storms for Ireland. All the ingredients are there for intense weather. The midlands, west and north are most at risk over the weekend.
It will be very warm and humid throughout the weekend.
Thunderstorms by their nature are hit and miss. Just make sure you don't caught out! I'm sure the mods will change it as best fits the risk because the models can change suddenly. I'm happy enough with this forecast.