I am fairly certain that the ‘north-south split‘ cliché started with Michael Fish, as much as I’m certain that John Kettley started the popularity of idiom ‘from the word go‘ one, still occasionally uttered today by the latest collection of weathercasters. The ECMWF forecast reckon the bulk of this week’s rain will fall across Wales, the Midlands and East Anglia, with the south coast and the bulk of Scotland staying reasonably dry. It certainly won’t be warm for July, especially in the sub 546 dam thicknesses across the north, and even in the south sub 564 hPa thicknesses must have come as a bit of a shock.
I wonder what the collective noun is for a gathering of weather forecasters? An outlook of forecasters perhaps? Or maybe even a shower of forecasters?