Wales weather: 100mph gales and rain bring disruption 27 December 2013 Last updated at 08:56 People are being warned to remain vigilant as gales and heavy rain batter Wales. Gusts of more than 100mph have been reported at Aberdaron as Anglesey and Gwynedd bore the brunt of the stormy weather which moved east towards Wrexham through the night. Council workers have been clearing fallen trees from roads with south west and south east Wales also affected. There is one flood warning in place for the Lower Dee Valley and eight alerts. The old M48 Severn Bridge has been closed but traffic on the newer M4 Severn Crossing is said to be flowing freely. In Gwynedd, fallen trees have blocked the A4085 Llanbeblig Road between Caeathro and the Waunfawr junction, and the A4086 Llanberis bypass between the B4547 junction and High Street. The Cleddau Bridge in Pembrokeshire is open to cars, but not to high-sided vehicles or motorbikes In Carmarthenshire the B4317 in Pontyberem is blocked in both directions between the B4306 Llannon Road junction and the B4310 Gwendraeth Road junction because of a fallen tree. The A40 in Powys is partially blocked between Trecastle and the Halfway junction because of a fallen tree In Denbighshire the A525 is partially blocked eastbound between Crown Hotel Traffic lights in Llandegla and the B5430 Old Road junction in Bwlchgwyn because of a fallen tree. Arriva Trains Wales said services between Holyhead and Llandudno Junction were expected to be delayed by up to 40 minutes in both directions due to speed restrictions imposed as a result of high winds and damage caused to level crossings at both Valley and LlanfairPG A replacement bus service is running between Harlech and Pwllheli due to damage to a river bridge at Llandecwyn In the south Wales valleys trains between Pontypridd and Aberdare are terminating at Mountain Ash due to signalling equipment damaged by flooding, with buses operating in both directions. Arriva added that five trains had hit small fallen trees on the tracks but there were no other major disruptions to services. The latest problems follow storms earlier in the week which brought flooding to parts of south and west Wales. It said the worst of the winds were likely to transfer across north west Wales and much of northern England during the day.