Outbreaks of rain will develop over central UK through the course of Saturday, and by the evening are likely to be heavy at times. This rain is likely to be prolonged over many areas overnight into Sunday morning, gradually becoming lighter and dying out later on Sunday.
Please be aware of the risk of local disruption to transport and outdoor activities.A frontal zone associated with very warm and moist air over southern UK early Saturday will ease northwards during Saturday, and become slow moving over central areas of England and Wales later Saturday, persisting overnight, before slowly easing away to the east during the course of Sunday. Rainfall will be heavy at times, and locally prolonged. Rainfall totals are likely to be in the range of 20-40 mm, but 50-75 mm is possible in some areas.The public is advised to take extra care, further information and advice can be found here: http://www.metoffice.gov.uk/public/weather/warnings/