On Wednesday night, dew points are shown by GFS to fall to around freezing, with a bit of precipitation about giving some sleet and snow in places... EURO-4 is close for midnight, but not quite there, so I wouldn't take it too seriously - a wintry mix is possible, but the vast majority of people are unlikely to notice it unless for some reason they were up lampost watching!
By contrast, we're still on course for a decent sort of weekend for England and Wales, in fact GFS has edged towards ECM in showing slightly higher 850hPa temps and 2m temps widely into the mid teens Saturday, high teens Sunday
This carries further on the GFS 06z op, all the way to the end of higher-res, in fact it warms up a bit more too.
The 00z GFS op was similar for Mon-Tue, but Saturday saw a frontal system far east enough to hold back the warm-up for the west until Sunday, with the far SW struggling to see much of a rise until Monday.
Both op runs are not bad through FI, with some unsettled spells but plenty of dry weather too, and temperatures mostly (the exception being a few days on the 00z) above average
The ECM 00z op tells a similar story to the 06z GFS op, but with more of an emphasis on unsettled by day 10, with the chance of some reasonable convective activity
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T-Max: 30.2°C 9th Sep (...!) | T-Min: -7.1°C 22nd & 23rd Jan | Wettest Day: 25.9mm 2nd Nov | Ice Days: 1 (2nd Dec -1.3°C in freezing fog)
Keep Calm and Forecast On