Downpour
18 July 2019 12:10:35

Originally Posted by: DEW 


 


But some of us who are gardeners do need the rain!


I wasn't  really agreeing with you earlier, but putting a different emphasis, hot early rather than warm, and a thundery breakdown followed by the foreseeable future pleasant rather than warm, i.e. close to or a little above average. I think that's still on according to the 06z


For warmth, I see that GFS06z has another (short-lived) plume around the 29th once the thundery stuff is out of the way



 


The average or slightly above is warm down here in July. That's my point.


 


I too am a gardener and I too want the rain midweek (just not next weekend thanks!) 


Chingford
London E4
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JOHN NI
18 July 2019 13:17:21

Originally Posted by: Ally Pally Snowman 


Yes please GFS 6z rebuilds high pressure in FI. Probably the best possible outcome.


 



0600 operational seems to be towards the top of the ensemble pack - (has a few members offering support) - but the majority are a good deal lower - offering cooler/more changeable conditions. 


 


John.
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Rob K
18 July 2019 16:50:57
12Z not as hot as the 06Z GFS. No 35C+ on this run.
Yateley, NE Hampshire, 73m asl
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TimS
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18 July 2019 16:57:26

Originally Posted by: Rob K 

12Z not as hot as the 06Z GFS. No 35C+ on this run.


Seems to show a new breakdown pattern which is very different from previous runs but presumably showed up on some of the ENS members that cooled down more quickly. UKMO seems to show the same: rapid breakdown from the West on Wednesday into Thursday, then fresher weather but settling down quite quickly.


Brockley, South East London 30m asl
TimS
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18 July 2019 17:00:25
GEM very hot up to Wed then very messy breakdown, but one that weirdly doesn't give that much rainfall to Southern UK.
Brockley, South East London 30m asl
Ally Pally Snowman
18 July 2019 17:02:43

Both GEM and UKMO have very hot Tuesday and Wednesday's.  GEM has 33c and 36c respectively UKMO would probably be the same.


Bishop's Stortford 85m ASL.
Ally Pally Snowman
18 July 2019 17:09:59

ICON is interesting tonight keeps the heat going to at least 180h Friday.  23c 850s still over the UK.  Sometimes the Ecm follows the ICON so we'll see later.


 


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TimS
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18 July 2019 17:17:42
GFS op is an even bigger outlier vs ens than in recent runs. If anything the mean actually stays hot longer than 06z.

There are two distinct clusters, and the spread starts from as early as Tuesday. Incredible how little consensus there is both between and within models. In the late June heatwave they all nailed the pattern early and stuck with it.

Brockley, South East London 30m asl
Brian Gaze
18 July 2019 17:19:16

Just stepping through the GEFS 12z on TWO and there appear to be some absolute flamethrowers on offer. I think 5 or 6 bring cooler air back to the south east by CoP on Thursday but the rest keep it hot.


https://www.theweatheroutlook.com/twodata/gefs.aspx?run=na&charthour=174&chartname=850tmp&chartregion=na-region&p=0&charttag=MSLP%20850hPa%20C


 


Brian Gaze
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Arcus
18 July 2019 17:23:50
Quite a marked difference between the GFS 12z ENS on how the intensity/track and potential disruption of the low from the Atlantic is being handled in the middle of next week. Understandable at this range, so I wouldn't pin any colours to any mast just yet.
Ben,
Nr. Easingwold, North Yorkshire
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Whether Idle
18 July 2019 17:27:53

Meanwhile in the real world the chance of some form of heatwave continues for the SE and possibly more widely.  Emotive trolls best ignored.


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Brian Gaze
18 July 2019 17:28:38

Please stay on topic.


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Rob K
18 July 2019 17:36:57

GEM has >20C 850s right up into southern Scotland, with most of England 22-23C! That's a near nationwide hot blast and I would suggest would seriously threaten the 2003 record.


 



Yateley, NE Hampshire, 73m asl
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TimS
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18 July 2019 17:50:05

Originally Posted by: Rob K 


GEM has >20C 850s right up into southern Scotland, with most of England 22-23C! That's a near nationwide hot blast and I would suggest would seriously threaten the 2003 record.


 




GEM shows 33C on Tuesday and 36C on Wed for London, but its  2m temps tend to undercook as there’s low spatial resolution.


Brockley, South East London 30m asl
David M Porter
18 July 2019 17:55:18

The way I am reading things at the moment is that while developments up to and including the early part of next week seem to be pretty well settled, what happened from midweek onwards is still very much up in the air. I think it is very much a case of watching the output carefully tomorrow and over the weekend to see whether or not the return to more settled conditions shown by the GFS 12z op gets any support from the other models.


Lenzie, Glasgow

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Shropshire
18 July 2019 17:55:30

UKMO would be high teens on Wednesday for the West and around 21C for Central areas.


 


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Ally Pally Snowman
18 July 2019 17:57:22

You can see the divergence starting on the 25th with prob 60% going for a longer heatwave. 


 



 


 


 


 


 


Bishop's Stortford 85m ASL.
Ally Pally Snowman
18 July 2019 17:59:56

Originally Posted by: Shropshire 


UKMO would be high teens on Wednesday for the West and around 21C for Central areas.


 



 


with 20c to 22c 850s covering most of England probably at least 10c to low.


 


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Gusty
18 July 2019 18:04:18

Since when did summer heatwaves become this hard to predict ? 


 


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Shropshire
18 July 2019 18:07:46

Originally Posted by: Ally Pally Snowman 


 


 


with 20c to 22c 850s covering most of England probably at least 10c to low.


 



No, the front is lying across the UK on Wednesday and has already cleared Ireland and Western fringes introducing the cooler air. The SE would of course still be hot until Wednesday night.


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