More specifically it describes a low-pressure area whose center of rotation is just off the East Coast and whose leading winds in the left forward quadrant rotate onto land from the northeast.
With high pressure now established up from the southwest in the eastern North Atlantic - and an area of lowpressure being held further west of Ireland - this year's festival continues on a settled and increasingly warm note.
There is a similar problem under investigation in Haverfordwest, Pembrokeshire, with staff taking calls from customers with no water or lowpressure in the SA62 postcode area.
There's this lowpressure system sitting out in the Bay of Bengal which is sort of nudging up exactly to the same area which is going to dump, I think it's 200 millimeters of rain, a huge amount of rain.