looking further ahead...
A forecast based on the 00zGFS output.....
It looks fairly quiet now for several days as High Pressure establishes itself to the west of the UK, blocking the atlantic, with the current modeled orientation of the HP I would expect a cool NWerly breeze bring in cloud & drizzle to western parts of the midlands, drier further east, but I think sunshine might well be at a premium...
Next wekend as the model output moves into FI, the HP is forecasted to slip away SWwards allowing a much cooler showery regime with North Westerly wind pattern, good news for western parts as cheshire gap streamers are possible with snow accs on the cards as upper temps are very low and well supportive of wintry PPN....
looking even further ahead Day 11 shows a deep Low Pressure skirting the south of the region, this would have the potential for a big snow event for all of the region, and as it pulls away to the east, introduces a very cold northerly toppler, dry for most parts (the wishbone effect) with snow showers in the extreme west & east of our region....
So there you go, a quick forecast, and as a rough guide, and in terms of accuracy and verification, I'd knock 5% per day off percentage probability