The weather warning is in effect for a significant portion of north, mid, and west Wales from 04:00 to 18:00 GMT. There is some uncertainty about the specific areas that Storm Debi might impact as it moves westward from the Irish Sea coast.
Inland areas could experience wind gusts reaching 65mph (105km/h), posing potential risks of injuries and danger to life. The areas under the weather warning include Anglesey, Gwynedd, Conwy, Denbighshire, Flintshire, Wrexham, Powys, Ceredigion, Carmarthenshire, and Pembrokeshire.
This warning comes in the wake of recent storms, Babet and Ciaran, which have already caused flooding in several Welsh communities. Residents are advised to stay alert and follow safety guidelines during the storm.