Valid 00:15 until 23:45 Saturday 2nd August.
Main areas affected: Blackpool, Cumbria, Lancashire, Blackburn with Darwen, Cheshire West and Chester, Greater Manchester, Halton, Merseyside, Warrington, Cheshire East.
A developing area of low pressure is expected to track north across the UK through the weekend. The heaviest rainfall is currently expected to develop on the western flank of the low, with 20 to 40 mm of rain likely to fall in 12 hours within the shaded area, and locally isolated totals perhaps exceeding 50 mm in the period.
It will be a thoroughly miserable day for the Isle of Man with unbroken downpours of rain which will be heavy and persistent. Cumbria will also see alot of rain.
Strong winds present an additional hazard later in the day along areas adjoining the northern part of the Irish Sea.
The public are advised to be aware of the risk of disruption to travel and outdoor activities due to localised surface water flooding.
This is a complex situation - the warning may well be updated again as the situation develops, and will be updated here, as well as on Twitter.
Follow @EmmaJessonTV for Twitter updates this weekend.