The warning takes effect at 6am tomorrow.
Updated Sun 7:31 PM
MET ÉIREANN HAS issued a weather advisory notice for the entire country on Monday, ahead of further thunderstorm and lightning activity.
The forecaster earlier issued a yellow weather thunder warning for 19 counties.
This evening, a new advisory valid from 6am on Monday until 11pm on Monday night was issued, with the forecaster saying more warnings are expected to follow.
Met Éireann said thunderstorm and lightning activity will develop tomorrow, particularly in the midlands, west and north of the country.
A yellow thunder warning for Munster, Connacht, Cavan, Monaghan, Donegal, Kilkenny, Laois, Longford, Offaly and Westmeath has been valid since midday and lasts until 11pm tonight.
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The UK Met Office has also issued a yellow thunderstorm warning for Armagh, Fermanagh, Tyrone and Derry, valid from 1pm until 9pm.
A Met Éireann weather advisory for the whole country, which was issued yesterday, is also in place until 9pm.