Just what are the public expected to make of warning areas shaped like this?
The usefulness of oddly shaped warning areas produced by the Met Office must be open to debate. Take this latest yellow blob for heavy rain which to me vaguely resembles the shape of a dinosaur trundling its way across Wales. Does that arm of yellow pointing towards Birmingham follow the path of the upper part of the river Severn perhaps? Rainfall is always heaviest over high ground, so why should heavier rainfall follow a river valley? The only way to see rivers on the mapping they use is to set zoom to maximum. Some rivers like the Dee through Llangollen then appear, but only intermittently. It’s the same with the river Severn that appears in Welshpool, but disappears again before reappearing at Shrewsbury, and the poor old town (or should that be city these days) of Shrewsbury never gets a mention. Why not improve mapping so it included all major towns and main rivers in blue to distinguish them from the road network, or perhaps better still bite the bullet and swap to overlaying their warnings on OpenStreetMap.
As for the warning itself, the latest ICON model shows just the usual higher ground of south Wales, Snowdonia and the Lake district receiving totals of over 30 mm of rain but there does look to be an arm extending to Shrewsbury in their accumulations chart till midnight tomorrow. In my opinion these NWP graphics with their simple outline maps, are far more informative than higher scale warnings map covered in yellow blobs will ever be.