Multiple weather warnings have been issued for the middle of the week after Storm Frank became the sixth named storm of the season.
The MET Office has updated many regions in Scotland to yellow “be aware” warnings, saying they are at risk of flooding.
Affected regions are the Highlands and Islands, Strathclyde, Grampian, the Lothians and central Scotland over Wednesday and into Thursday.
Tayside has been issued additional warnings for flooded roads, with the MET Office saying: “River levels on Tuesday remain high following heavy overnight rain. Further heavy rain on Wednesday will cause rivers and small watercourses to rise again.
“Due to the saturated ground and high loch levels there may be flooding to low-lying land and roads, which may cause disruption to travel.”
The mid belt of Scotland from Glasgow to Edinburgh could see up to six inches (150mm), while some exposed parts of Southwest Scotland could receive between 100mm and 150mm of rain. Widely it will be between 20mm and 40mm.
However, Thursday should bring clearer spells and only light rain for affected areas.
A Met Office forecaster reported: “Further rainfall is expected to arrive across much of Scotland and northern England during the early hours of Wednesday.
“The rain will become persistent and heavy at times over high ground before clearing to the south east overnight Wednesday and into early Thursday.
“Some very strong winds are also likely in association with this system with gusts of 60mph possible in places.
“South-westerly severe gales will develop across the north west of the Scottish mainland and the Western Isles on Wednesday, with winds perhaps touching storm force in exposed areas during the afternoon.”
The gales are expected to last through the afternoon and evening but should ease by the early hours of Thursday.