Information on update: Extension of the warning into Saturday and including the Scottish Central Belt. Heavy showers are expected across much of the UK on Friday. Within the warning area these showers and thunderstorms will be slow moving and may cause localised surface water impacts.
Rainfall totals will vary considerably and not all locations will be affected by the heaviest showers. However, where the showers do occur there is potential for 20-30 mm of rain in a short space of time and during the course of the day there is a chance that some places could see as much as 80-100 mm build up. For further details see https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings