It depends on the balance of power between a mid-Atlantic trough and a Scandinavian trough.
Small changes in the strength of the jet stream seem to make all the difference in recent model output... it's been totally unreliable with wild swings and roundabouts
After GFS and UKMO favoured the Scandi trough this morning, they've both backed off this evening, GFS just a little and UKMO quite a lot. Unfortunately a fair bit of the 'warm' weather across the middle swathe of the UK involves nights in the mid-teens and days in the high-teens, maybe low 20's but with not much sun to be enjoyed.
GFS 12z CET return estimates for this coming week:
Mon 16-17*C, Tue 17-18*C, Wed 16-18*C, Thu 19-21*C, Fri 15-17*C, Sat 12-15*C, 15-17*C.
So a slight rise possible Tuesday through Thursday, then a drop Friday-Sunday, based on the raw values from this particular model run.
Funnily enough the run throws out a UK high for lower-res but it starts unusually cool, gradually warming up through to day 16. I'd be looking for the high to set up further east or at least south as I doubt the late-month warmth would be enough to undo the damage done by five days of clear, fresh conditions.
Not that we can at all count on finding ourselves looking at a decent high in the first place
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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)
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