Hurricane-force Storm Corrie threatens a chaotic commute this morning for people returning to work for the first time after home working rules were relaxed.
Railway timetables were already operating on a reduced service before last night's significant weather event crashed in from the west at 90mph.
Due to the danger to overhead power lines posed by the winds, ScotRail withdrew all of its services from 6pm last night.
In the north and north-east, customers who lost power during Saturday's Storm Malik have been told it will be later this week before supplies can be restored.
The Met Office said Scotland was on the receiving end of an "intense" area of low pressure which formed off the east coast of the US before racing across the Atlantic.
Corrie was forecast to bring gusts of 70-80mph and potentially 90mph in exposed coastal locations.
Forecasters told of "mountainous" seas lashing the coasts.
An amber "be prepared" warning was in force in the northern half of the country until 6am this morning but the yellow "be aware" one for the whole of Scotland continues until noon today.
Jonathan Vautrey of the Met Office said: "People really need to be aware of these warnings when they are setting out for work on Monday morning.
"The amber one may expire early on but the yellow one means that disruption to transport can be expected up to lunch time at least.
"High pressure has been dominating the UK for most of January, sending any Atlantic storms way to the north of us.
"But that high pressure has sunk away to the south, allowing storms to creep further south.
"Storm Corrie will be more significant and impactful than your average winter storm."
On top of the strong winds warning, the Met Office urged some areas to prepare for icy conditions and possible blizzards this morning once the gales have passed.
Skies were expected to clear last night, followed by some overnight snow and sleet showers particularly in the north and north-west.
These are likely to lead to ice forming on untreated surfaces, while strong north westerly winds could create blizzard conditions on higher ground.
As a result, a further yellow "be aware" warning has been issued to Central, Tayside and Fife, Grampian, Highlands and Islands and the Argyll and Bute region of Strathclyde, lasting until 10am this morning.
Storm Corrie roared in barely 24 hours after the country was battered by Storm Malik, leaving three people dead.
A 60-year-old woman was killed in Aberdeen when a tree fell on her and in Lanarkshire, a 32-year-old lorry driver died when his vehicle crashed through the central barrier on the M74 and collided with a Land Rover Discovery.
It is understood his lorry was blown over by powerful gales.
And in England, a nine-year-old boy died when he was struck by a falling tree in the hamlet of Winnothdale in Staffordshire.
Power companies said about 34,000 customers were still without supplies across the north of England and Scotland.
As of 11am yesterday, power network SSEN said 18,500 customers were still without power, mainly in rural Aberdeenshire, Angus, the Highlands, the Moray coast and Perthshire.
The impact of Storm Corrie is "likely to be significant", First Minister Nicola Sturgeon warned yesterday.
Sturgeon tweeted: "There are amber/yellow @metoffice warnings in place for all of Scotland as Storm Corrie sets in – please heed the warnings and take care.
"Impacts from the storm are likely to be significant tonight & into tomorrow.
"Work to repair the damage from Storm Malik continues."
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