By James McCarthy
BBC News
More than 1,000 homes in south Wales are without power as Storm Isha hits.
A gust of 90mph was recorded on Capel Curig, in Eryri, also known as Snowdonia.
The whole of the UK is covered by danger-to-life wind warnings with people being warned not to travel.
According to the Met Office all of Wales is covered by an amber wind warning and most of it is covered by a yellow one for rain.
It said on Twitter: “Gusts seem likely to top 100mph at this very exposed site by the first part of the night.”
Most of the power cuts are in Newcastle Emlyn, in west Wales, with nearly 400 properties hit, while more than 200 are without power in Saundersfoot, Pembrokeshire.
Scottish Power do not provide figures for north Wales.
The Met Office said its wind warning would be in force from 18:00 GMT on Sunday to 06:00 on Monday while the rain warning would be in place from midnight to 06:00.
It warned of possible power cuts, building damage, travel disruption, and road and bridge closures.
“Injuries and danger to life is likely from large waves and beach material being thrown onto coastal roads, sea fronts and properties,” its website warned.
The coastguard asked people to take care by the coast.
“Keep away from cliffs, watch out for tidal surges, and steer clear of big waves,” it said.
Natural Resources Wales had a number of flood alerts in place. On X, formerly known as Twitter, it urged people to be wary of falling trees and branches.
It also warned river levels were expected to be higher than normal.
Rail, sea and air travellers are set to face disruption, with closures, cancellations and delays expected.
Avanti West Coast said there were cancellations on all routes and disruption was expected for the rest of the day.
Great Western Railway said there were delays on all routes and disruption was expected until 06:00 on Monday.
Transport for Wales has cancelled a number of services.
Flights set to arrive at Cardiff Airport from Amsterdam and Edinburgh have been cancelled as have subsequent departing flights.
A Ryanair flight from Dublin is delayed by an hour.
According to traffic service Inrix the M48 Severn Bridge was closed in both directions and there were speed limits on the Britannia Bridge to Anglesey.
A fallen tree has closed the B4391 Allt Goch in both directions from the A470 at Ffestiniog to the A496 at Rhyd Y Sarn.
Viaducts over the Rivers Dee and Ceiriog have also been closed.
The Met Office said “everybody” would be affected by the storm.
Two different amber warnings are in place across the UK saying 70mph winds should be expected inland, with gusts of 80mph on coastal regions.
Met Office meteorologist Tom Morgan said: “We’re expecting widespread gales to affect the UK, amber warnings are in place for large parts of the country.
“There’s the potential for danger-to-life and damaging winds potentially leading to some power cuts in places, some large waves around coastal regions could bring some debris onto roads and trees could come down.
“We have a wind warning in place across the whole of the UK, it’s pretty unusual for the whole of the country to be under a blanket wind warning.”
National Air Traffic Services said air traffic restrictions were in place. It said it was working with airports and airlines and urged passengers to check flight arrangements.
The RAC warned drivers to cut their speed and consider delaying journeys.
Storm Isha is the ninth named storm to hit the UK since the season began in September.
Each storm is named when it poses a risk to people and they are given names beginning with consecutive letters of the alphabet.