Heavy rain has caused flooding and disruption for travellers in some areas.
The Met Office issued a yellow "be aware" warning of rain for Strathclyde, central and south-west Scotland, Tayside, Fife and Lothian and the Borders.
Flood alerts are in place for parts of Tayside, Ayrshire and Arran, central Scotland and Dumfries and Galloway, the Scottish Environment Protection Agency said.
Many roads are severely flooded, including the A737 which is closed between Kilbarchan and Howwood, Renfrewshire.
Surface water has caused problems on the M74 in the Lanarkshire area and drivers have also been warned to take care on all routes in Dumfries and Galloway.
Train passengers face cancellations and delays through Anniesland and Westerton in Glasgow because of flooding.
Flooding between Dalmuir and Garscadden is also disrupting trains through those stations to Motherwell, Springburn and Lanark.
Claire Austin, a forecaster with MeteoGroup,, said: "The worst affected area of Scotland at the moment is the south-west with heavy rain which is spreading across the rest of southern Scotland. Northern areas at the moment just have one or two showers in the west but are mainly dry.
"As we go through this afternoon the rain in the south is going to push gradually north into north-east Scotland, gradually fading out.
"There will be one or two showers overnight before we get another push of heavy rain spreading in from the south and south-west overnight. We are expecting some heavy downpours and maybe even a rumble of thunder over western areas."
Why are you making commenting on The Herald only available to subscribers?
It should have been a safe space for informed debate, somewhere for readers to discuss issues around the biggest stories of the day, but all too often the below the line comments on most websites have become bogged down by off-topic discussions and abuse.
heraldscotland.com is tackling this problem by allowing only subscribers to comment.
We are doing this to improve the experience for our loyal readers and we believe it will reduce the ability of trolls and troublemakers, who occasionally find their way onto our site, to abuse our journalists and readers. We also hope it will help the comments section fulfil its promise as a part of Scotland's conversation with itself.
We are lucky at The Herald. We are read by an informed, educated readership who can add their knowledge and insights to our stories.
That is invaluable.
We are making the subscriber-only change to support our valued readers, who tell us they don't want the site cluttered up with irrelevant comments, untruths and abuse.
In the past, the journalist’s job was to collect and distribute information to the audience. Technology means that readers can shape a discussion. We look forward to hearing from you on heraldscotland.com
Comments & Moderation
Readers’ comments: You are personally liable for the content of any comments you upload to this website, so please act responsibly. We do not pre-moderate or monitor readers’ comments appearing on our websites, but we do post-moderate in response to complaints we receive or otherwise when a potential problem comes to our attention. You can make a complaint by using the ‘report this post’ link . We may then apply our discretion under the user terms to amend or delete comments.
Post moderation is undertaken full-time 9am-6pm on weekdays, and on a part-time basis outwith those hours.
Read the rules hereComments are closed on this article