Strong winds from Storm Barra have brought power cuts and forced ferry services to be cancelled in Wales.
Wind speeds of 86mph (138km/h) have been recorded in Aberdaron, Gwynedd, topping the highest recorded during Storm Arwen the weekend before last.
Western Power Distribution (WPD) reported 491 homes without power in Wales. About 70 train services have also been cancelled due to the storm.
The weather warning lasts until 18:00 GMT on Wednesday in parts of Wales.
It covers Bridgend, Cardiff, Carmarthenshire, Ceredigion, Conwy, Gwynedd, Anglesey, Monmouthshire, Neath Port Talbot, Newport, Pembrokeshire, Powys, Swansea and Vale of Glamorgan.
The Met Office described the wind as a “violent storm force” after the strongest gust recorded during Storm Arwen was 81mph at Aberporth, Ceredigion.
Part of the roof of Ysgol Bryngwyn in Llanelli, Carmarthenshire, was damaged at about 16:00 GMT, when most pupils had already left for the day.
The school said nobody was injured and everyone still on site were “evacuated calmly”. But the school will be closed on Wednesday.
Betsi Cadwaladr health board announced that opening times of its Covid testing sites may be affected, and warned testing sites listed on its website could close at short notice.
Of the homes without power Western Power Distribution said 251 were in Monkswood, Monmouthshire; 188 in Pontyates, Carmarthenshire; 34 in Llandeilo, Carmarthenshire; there 29 were in Caldicot, Monmouthshire; 26 in Abercraf, Powys; and 3 in Milford Haven, Pembrokeshire.
WPD said it was “business as usual” and engineering staff were on standby if needed.
Natural Resources Wales (NRW) issued nine flood warnings across the country in tidal areas at Newgale, Dale, Amroth, Cardigan, Aberaeron, Aberystwyth, Clarach Bay, Pendine and Carmarthen Bay Holiday Park in Kidwelly.
A flood warning was announced for low-lying and coastal properties between Ynyslas and Brynowen in Borth, Ceredigion.
Glanlerry Caravan Park and Animalarium in Ceredigion was at risk from the River Leri with waves expected to break over the sea defences in that area between 21:15 and 23:45.
Natural Resources Wales (NRW) has seven flood alerts in force on the north Wales coast, west Anglesey coastline, Llyn Peninsula and Cardigan Bay coastline, Ceredigion coast between Clarach and Cardigan, Pembrokeshire coast, Carmarthenshire coast, the tidal area at Crofty and Swansea Bay and the Gower coast.
Pembrokeshire council urged the public to avoid its coastal areas, and large waves are expected to surge during high tide at 20:30 in Milford Haven.
IMAGE SOURCE,MET OFFICEWhat’s happening on the roads?
A fallen tree has partially blocked the A4075 Holyland Road in Pembrokeshire. There has also been a fallen tree on the A5 Holyhead Road, near the recycling centre.
The A487 at Newgale will also be closed in both directions from 19:45 and could remain closed overnight, Pembrokeshire council warned.
Gwent Police announced the A469 in Pengam, Caerphilly, was closed due to flooding.
The A477 Cleddau Bridge in Pembrokeshire closed to all vehicles due to the high winds and may remain shut into Wednesday morning.
The B5429 in Denbigh, Denbighshire, closed between Llandyrnog and Bodafri due to fallen trees and powerlines.
Storm Arwen caused havoc for several days after it struck last weekend, leaving thousands without power, roads blocked and rail services suspended.
How have railway lines been affected?
More than 100 train services in Wales were cancelled or disrupted.
The Transport for Wales (TfW) website shows services from Holyhead to Milford Haven affected by the weather.
TfW reports 67 train services have been cancelled and another 67 have been altered due to the storm.
Those hit hardest are operating between west Wales and Cardiff, and across north Wales. A revised train timetable has been in place since 06:00 on Tuesday until the end of services on Wednesday.
“A significant amount of our services will either operate at different times, take much longer to reach destinations, or may not operate at all,” said planning director Colin Lea.
The storm also forced the closure of events, including Amman Valley Christmas experience in Brynamman.
Met Office meteorologist Rachel Ayers told BBC Radio Wales there could be “severe coastal gales” that could lead to some “temporary coastal damage”.
“For inland there could be similar impact but we are not expecting quite such strong gusts,” she said.
She warned there was a chance of some snow, particularly in Snowdonia.
The Met Office website said there could also be delays to road, rail, air and ferry transport and coastal communities could be affected by spray and large waves.
Ferry services between Rosslare and Fishguard were cancelled.
NRW warned people to “be cautious of weakened trees in our forests and of high waves along the coast”.
