Severe thunderstorms could bring heavy downpours, localised flash flooding and large hailstones over the coming hours.
Met Éireann has issued a status yellow warning for thunderstorms for six counties since 3PM - including all of Connacht.
It'll remain in place until 6pm tomorrow Friday evening.
However the national emergency co-ordination group says storms could develop anywhere in Ireland.
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Its also advising people to stay vigilant for heat stress, with record high temperatures possible in parts today.
Possible impacts:
• Localised flooding
• Lightning damage
• Hail
• Hazardous driving conditions
• Gusty winds
