The effects of the weather bomb have resulted in more than 17,000 people in the Western Isles going without power. 15 flood warnings and 12 flood alerts have been issued by the SEPA.
Waves measuring 52 feet have been recorded off the Outer Hebrides.
A Spanish fishing vessel is being escorted to safety after encountering difficulties off Orkney.
On the roads, police have warned that travel conditions in badly-affected regions of Scotland could be "hazardous," and the Skye Bridge and Forth Road Bridge have been closed to high-sided vehicles, while the Tay Bridge was only open to cars.