Regional Flood Alerts and local Flood Warnings are in place in South West, Central, North and North East Scotland.
A band of heavy rain will cross Scotland from late afternoon, clearing overnight. In particular, it will affect Dumfries and Galloway, South Ayrshire, Central and Tayside areas.
Localised surface water flooding issues are possible, particuarly in built up areas and along the road network. Difficult driving conditions are likely during some of the heaviest outbreaks of rain and localised flooding from small watercourses could occur.
A combination of high tides and high waves, with a strong south easterly wind will also bring a risk of coastal flooding due to spray and wave overtopping along exposed areas on Friday and Saturday.
Live, real-time flood updates are available on the SEPA website or for specific notifications for your area, please sign up to Floodline on 0345 988 1188. People can also report and check flooding impacts in their area using Report-a-Flood.