Issued at: 12:11 on Friday 4 December 2015
Valid from: 02:00 on Saturday 5 December 2015
Valid to: 06:00 on Sunday 6 December 2015
Outbreaks of rain will develop later on Friday, becoming persistent and heavy overnight and lasting through Saturday, before clearing southwards early on Sunday.
Be prepared for the likelihood of flooding affecting properties and parts of communities. Watercourses may become dangerous, deep and fast-flowing, while some transport disruption seems likely.
Chief Forecaster’s Assessment
A frontal zone will move into northern Britain later on Friday and become slow-moving for 24-36 hours, bringing a prolonged spell of heavy rain and strong winds.
Rainfall totals of 60 to 100 mm are likely quite widely, with some prone mountainous areas seeing in excess of 150 mm over a 30 hour period, perhaps even very locally around 200 mm. Given saturated conditions and high river levels from recent rainfall, further flooding is likely. The warning will be kept under review, with possible further updates.