Forecasters have issued a status orange thunder warning for 16 counties this morning.
The weather warning is in place for the counties of Leinster, Cavan, Monaghan, Waterford and Tipperary this morning.
Met Eireann have said that thunderstorms will affect parts of the east and southeast this morning bringing sudden downpours, gusty winds and hail.
The forecaster added: "Hazardous driving conditions are likely in areas affected.
"Largely dry elsewhere with hazy sunny spells developing and just isolated showers.
"Showers in the east clearing this afternoon with good sunny spells breaking through but further showers will push in to affect parts of the southwest and west."
A Status Orange thunder warning for Tipperary will stay in place until 10am.
These thunderstorms arrive after some wonderful weather with temperatures soaring to the mid-high twenties across Ireland.
The thunder warnings will end before lunch.
It is set to be bright and breezy on Sunday with sunny spells and scattered showers with temperatures between 17 to 20 degrees.
On Monday, there will be sunny spells and isolated showers in light northwest winds with highest temperatures 16 to 20 degrees.
Tuesday will be dry with a mix of cloud and sunshine with temperatures between 15 and 19 degrees.
Wednesday will be another dry day with sunny spells.
The UK will bask in a scorching heatwave this weekend as today is expected to be the hottest day in June - but it could still bring thunderstorms in some areas.
The Met Office have said London could be hotter than the Caribbean and Hawaii, possibly breaking June's 35.6C UK record, set on June 29, 1957, in London.
If it breaks the record, it could be the hottest June day for 178 years.
The rising heat is in part due to warm air originating from northern Africa that has brought a scorching heatwave to a large swathe of Europe.
France recorded its all-time hottest temperature, a sweltering 44.3C on Friday as 'a tongue of fire' inches closer to the UK.
Officials in Paris have installed hundreds of extra water fountains in a bid to prevent a repeat of 2003 tragedy which resulted in hundreds of casualties.
Meanwhile, massive forest fire is spreading through Catalonia, northern Spain, after manure self-ignited and triggered a 10,000-acre wildfire.
Hundreds of firefighters attempted to control the conflagration as helicopters dumped water on the fires which raged some 80km (50 miles) inland from the coastal town of Tarragona.
