"Christmas Eve will start off bright with some sunshine but there will be some showers", Deirdre Lowe of Met Éireann said.
Train services through Dumfries and Galloway were affected by the storm on Friday with a revised service between Glasgow Central and Newcastle due to bad weather which has affected stations at Sanquhar, Dumfries, Annan and Gretna.
Winds topping 70mph have already battered the North Wales and Scottish coasts and the storm is heading inland.
The Scottish Environment Protection Agency issued eight flood warnings for Tayside, the Borders and Easter Ross and eight flood alerts across the country.
Yellow Met Office wind warnings have been issued for northern England and southern Scotland.
A spokesman said: "We are advising everyone to check in as normal but we would like to advise travelling passengers that due to Storm Barbara, we are expecting wet and windy conditions in the United Kingdom on Friday and possibly Saturday".
The winds are expected to moderate on Saturday morning.
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A Met Office spokesman added: "With the amber warning in place be careful of high-sided vehicles and winds and take care travelling in hard driving conditions".
But after the weather has exhausted itself out with Storm Barbara and Conor in the space of three days, things are expected to calm down on Boxing Day.
Scotland's transport minister, Humza Yousaf, urged people to check the latest sources of information before they travel and keep in mind that the situation could change quickly.
"But the nature of the storm means it still has the potential to have an impact on power supplies, structures, and disrupt bridge and ferry crossings".
The number is available to people in England, Scotland and Wales, regardless of who they buy electricity from.
Tomorrow afternoon may not be the best weather for a Christmas walk in the afternoon as heavier rain is expected in the afternoon and evening. "We are acutely aware of the time of year and the increasing concern this brings and would like to reassure our customers we will be doing all we can to keep disruption to a minimum", he said.