Scotland residents are being advised not to travel and some key bridges will be closed off as the gale-force storm hits. Police will be issuing updates throughout the day.
Travel chaos is expected as motorways become gridlocked and rail routes are delayed. Drivers have been told to look out for black ice on the roads.
Hundreds of schools have been closed and power lines have been affected.
The Met Office has said there is a high risk of structural damage as winds batter Strathclyde, the central belt, Tayside, Lothians and the borders areas of Scotland.
The gale reached 107mph over Aonach Mor, near Ben Nevis, and 102mph over Glen Ogle in the Trossachs, but the storm is expected to peak around noon in Glasgow and 3pm in the east of the central belt, although high winds will last into the evening.
The country also looks set for up to 12 inches of snow as a drop in temperatures to -3°C is expected to bring blizzards.
The Scottish Environmental Protection Agency has issued 11 flood alerts for locations across Scotland.
As Soctland’s residents took to Twitter, the storm was renamed Hurricane Bawbag.
American hurricane namers are lazy. They pick easy ones like “George” and “Kate”. Only in Scotland could they come up with #HurricaneBawbag,” tweeted one person
“#scotstorm now officially renamed #HurricaneBawbag + trending. Infinitely more Scottish+ immediately less scary,” said another.
Get more info here: metoffice.gov.uk