GFS Op shows a picture of LP north of Scotland with strong SW-lies predominating across Britain and on a long way into Europe - but with a few brief interruptions: a small but intense LP 985mb N Ireland Sun 1st , another local LP 965mb W Scotland Fri 6th and then a much larger LP N Sea 960mb Sun 8th, the last of these extensive enough to bring in a 2-day N-ly.
The WX temps are consequent on the Op pattern with a band of cool, rather than cold air extending from N Spain all the way to W Russia, even the super-cold over Siberia disappearing; and any cold staying to the N, i.e. Scandinavia, Iceland, and just a touch in N Scotland. Rain/pptn for Atlantic coastal countries continues, extending to the Baltic in week 1 and then across France down to the Adriatic in week 2.
ECM has the same general pattern as GFS but omits the first two local LPs though it does show a much deeper LP winding up in the Atlantic 965mb Sat 7th (Sun 8th beyond end of run)
The Jet stream in the Atlantic is not especially strong but it is persistent in the area of the British Isles, beginning to oscillate somewhat after Sun 8th. I'm surprisd that the recent widespread storm in the US hasn't induced a major perturbation. EDIT Afterthought - this would tie in with reports that I heard saying that the very cold air in the States was quite shallow, less than 10,000 feet. That would allow the jet to pass over the top undisturbed.
FAX has a continual array of fronts across S England for the next week in addition to the more general LP further N. IMO floods can be expected.
GEFS as yesterday, in the S mild at end of Dec (but this not appearing in Sotland where on the cool side of norm), then again around Fri 6th but this latter spell not lasting as long as forecast yesterday, mean temp back near norm from Tue 8th with the cold spell suggested by the Op above only in a minority of ens members. Rain more frequent and continual than shown yesterday, though Scotland gets a break around Tue 3rd.
Edited by user
28 December 2022 12:02:05
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Reason: Not specified
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