A Status Yellow fog warning has been issued for Cavan and Monaghan in the morning.
The weather warning will impact a total of 11 counties.
It'll come into effect in the midlands, Cavan, Monaghan, Dublin, Kildare, Louth, Meath and Wicklow from 5am until 10am.
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Met Eireann is warning of poor visibility and difficult driving conditions, due to dense fog.
