Met Office amber "be prepared" warning in place until 18:00
25,000 homes across Scotland without power
Widespread disruption to rail services across the country
Major incident declared in Dumfries and Galloway
Fallen trees affecting multiple routes
Cameron Buttle
BBC Scotland
Driving conditions very difficult down here in the Borders, lots of debris on the roads, it's bad on the B roads but A roads are also affected.
Scottish Borders Council tell me there are power cuts in Jedburgh, Hawick and Peebles.
Emergency planners are expecting the worst of the storm to hit at about 2pm.
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Image source, SEPAFlood warnings:
Flood alerts:
Weather presenter Judith Ralston with the latest, complete with some Scots vernacular.
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A section of Princes Street in Edinburgh has been closed after parts of a shop roof flew off in strong winds.
Police Scotland was alerted to lead falling from the Topshop building at about 12.30pm.
A cordon has been put in place on the eastern part of the street.
Meanwhile, South Bridge Street has been shut between Chambers Street and the High Street after lead fell from the Tron Kirk at about 12.10pm. There have been no injuries in either incident.
BBC Weather Watcher DaCaptain sent us this picture of stormy seas off the coast of Aberdeen.
Image source, BBC Weather watchers/Da CaptainThree schools have now been shut due to Storm Ali in Dumfries and Galloway.
Primaries in Wigtown, Port William and Kelloholm have all been closed.
Tay Bridge: NOW CLOSED to all vehicles Central walkway closed.
Forth Road Bridge: Closed to motorcycles, bicycles and pedestrians with wind gusts recorded at 62mph
Queensferry Crossing: Currently closed to high-sided and wind-susceptible vehicles, but is not expected to close to cars or single deck buses.
Erskine Bridge: Remains closed to high-sided vehicles
Police have closed off several sections of road and pavement in central Edinburgh following reports of storm-damage to buildings.
A piece of roofing has come down off the Tron Kirk on Edinburgh's South Bridge which has been closed between Chambers Street and Hunter Square.
Part of Princes Street has been closed because of overhanging lead.
There are no reports of any injuries and traffic is being diverted.
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BBC Weather Watcher Jangus sent in this picture from Hamilton.
This is in Chantinghall Road, and Jangus said police were in attendance directing traffic away from the scene.
Image source, BBC Weather Watchers/JangusA man has been taken to hospital after he was struck by a falling tree branch while cycling in Glasgow.
Police Scotland said emergency services were called to Springfield Road in Parkhead at about 12:10.
The cyclist was taken by ambulance to Glasgow Royal Infirmary. There was no immediate word on his condition.
The main road into Tealing off the A90 in Angus is closed due to a downed electrical cable. Engineers are en route to fix the problem.