Drew Collier, the operations director, said: “Weather forecasts for the west of Scotland are predicting a stormy week for many especially as we near the weekend when people will be travelling for Christmas.“We will review sailings on a case-by-case basis but would advise anyone planning to travel by ferry to take this into account when planning journeys in the next few days.” An amber “be prepared” warning has been issued for large parts of Scotland for from midday on Friday to 6am on Christmas Eve, while yellow “be aware” warnings covering a wider area into England and Northern Ireland are in place from 9am on Friday for 24 hours. #StormBarbara affecting the UK on Friday. Some travel disruption likely. Keep up to date with the latest information on our website and app pic.twitter.com/1zHbB4XUp5— Met Office (@metoffice) December 20, 2016 The picture promises to be different in the South of the country, with the Met Office predicting temperatures of 13 degrees on Christmas Day, on a par with Rome and Athens.This will, however, bring rain and showers. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. Christmas travel plans look set to be thrown into chaos, with 90mph winds threatening to strike large parts of the UK from Friday.The Met Office has named Britain’s second official storm of the winter, Storm Barbara, as it issued weather warnings for Northern England, Scotland and Northern Ireland. The Met Office has issued an amber “be prepared” weather warning for large parts of Scotland for Friday and Christmas EveCredit:BBC/Universal News And Sport Met Office spokesman Nicky Maxey said: “There is a low-pressure system developing in the Atlantic and moving towards the UK as we approach Friday and Saturday.“If people are travelling by ferry or taking flights these may be disrupted so it’s better to check with your travel provider before you travel.”She added: “If you are travelling in a high-sided vehicle, the wind speed may cause problems.” Flights continue to take off from Bristol airport as thick fog covers the UK causing travel disruptionCredit:Brad Wakefield/REX/Shutterstock The forecaster has warned of possible disruption to power supplies and “the potential for some structural damage”.There are also to be restrictions on some bridges and disruption to ferries and flights.Caledonian MacBrayne began cancelling ferry services on Tuesday, including crossings from Oban to Coll and Tiree, Ullapool to Stornoway, and Mallaig to Armadale on Skye.