https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings#?date=2023-10-07
The met office warn of widespread totals 50-75mm with some higher ground seeing as much as 150mm by the end of the weekend.
UKV, a short term, high resolution model shows many areas reaching around 80mm. A very wet weekend to come. Not a good weekend for hill walking in much of Scotland.