The Weather Outlook

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JOHN NI
11 July 2018 10:23:02

http://old.wetterzentrale.de/pics/MT8_London_ens.png

The 17th now seems to have firmed up as the point at which the tight clustering of fine weather breaks down into uncertainty. However to say that the weather will also break down at this stage seems premature. I would expect there will be at least a blip in the settled spell early next week, but beyond that it would be a brave person to call the rest of the month!

Originally Posted by: Rob K 

Broadly agree but we're looking for trends and they currently suggest the second half of July will be appreciably less settled than the first half. How this pans out in detail is open to many interpretations but at the moment, I'm going for a slow transition to a more climatological pattern where the south-east sees more in the way of warmer, drier conditions and the northwest sees more in the way of an Atlantic influence. I wouldn't rule at least one significant hot plume event  in the south and east before months end.


John.

The orange County of Armagh.

The Beast from the East
11 July 2018 10:53:32

http://www.meteociel.fr/modeles/gfse_cartes.php?&ech=300&mode=1

Some extreme heat for Spain

Still largely high pressure dominated, but a greater chance of showers than recently

 


Purley, Surrey, 70m ASL

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Jiries
11 July 2018 11:17:09

http://www.meteociel.fr/modeles/gfse_cartes.php?&ech=300&mode=1

Some extreme heat for Spain

Still largely high pressure dominated, but a greater chance of showers than recently

 

Originally Posted by: The Beast from the East 

Likely to strike us later or early August eventually as like past great summer's always get those extreme temps results.  We have a perfect ingredient for high record breaking temps with so dry ground now  warmer sea temps and warm ground temps.

Brian Gaze
11 July 2018 12:55:05

Surprised no comments on the 6z update. GEFS look very warm and not very wet in the south


Brian Gaze

Berkhamsted

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Russwirral
11 July 2018 12:59:59

Surprised no comments on the 6z update. GEFS look very warm and not very wet in the south

Originally Posted by: Brian Gaze 

 

Just looking at this now Brian... amazing (compared to recent summers) at how much we stay above average for upper air temps, with a strong pattern desire to stay above +10*c .  Weve struggled to get that on occasions in the past


Russwirral
11 July 2018 13:02:37

If we could make it to Monday for rain, then it would mark exactly a month since our last rainfall here on the Wirral.  A record some places to the south east might not be so crazy, but for the north west of England  - it really is.


andy-manc
11 July 2018 13:22:07

If we could make it to Monday for rain, then it would mark exactly a month since our last rainfall here on the Wirral.  A record some places to the south east might not be so crazy, but for the north west of England  - it really is.

Originally Posted by: Russwirral 

And even that wasn't on the back of a wet spell. I remember a month ago it had that "you can smell the rain" before it rained moment that you get when it hasn't rained for a while. It's been insanely dry for these parts.

If we have to have an unsettled spell, I'm hoping we get a similar break down to the ones in May and June which was a rainy day, followed by a mixed but mainly dry and mild 2 or 3 days, followed by weeks of endless warm sun. I don't think that is out of the question yet!

TimS
  • TimS
  • Advanced Member
11 July 2018 13:24:29

http://www.meteociel.fr/modeles/gfse_cartes.php?&ech=300&mode=1

Some extreme heat for Spain

Still largely high pressure dominated, but a greater chance of showers than recently

 

Originally Posted by: The Beast from the East 

Will be a change. I’m in Madrid today and not only is the grass a touch greener here than in London (they had a very long spring that only turned into summer in July) but it’s realky quite pleasant - 30C with a breeze and thunderheads forming over the Sierra.


Brockley, South East London 30m asl
moomin75
12 July 2018 07:37:10
As if by magic at England's exit from the World Cup, it does look as though our golden summer is coming to an end. All the major models now looking increasingly unsettled with semi-stationary trough parking itself over UK soon. Rain fest is on the way I fear.
Witney, Oxfordshire

100m ASL

Brian Gaze
12 July 2018 07:44:42

As if by magic at England's exit from the World Cup, it does look as though our golden summer is coming to an end. All the major models now looking increasingly unsettled with semi-stationary trough parking itself over UK soon. Rain fest is on the way I fear.

Originally Posted by: moomin75 

Well on the bright side if the start of the summer hols turns into a washout that's a good angle for me. Excellent for site traffic. 


Brian Gaze

Berkhamsted

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TimS
  • TimS
  • Advanced Member
12 July 2018 07:51:18
Yes, looking very wet but still warmish. Nearly 100mm in 2 weeks in the SE on this morning’s GFS, yet maxes in the 20s almost throughout.

I did enjoy the parched landscapes, but warm and wet would be better than cold and wet.


Brockley, South East London 30m asl
Jiries
12 July 2018 08:03:13

Yes, looking very wet but still warmish. Nearly 100mm in 2 weeks in the SE on this morning’s GFS, yet maxes in the 20s almost throughout.

I did enjoy the parched landscapes, but warm and wet would be better than cold and wet.

Originally Posted by: TimS 

Look like a short term rainfall mid-month in form of thunderstorms so some areas areas get it or not then drier again with average temps which by now around 24-25C for the peak summer days.  But thing is the GFS had been very poor lately and they even put huge rain spikes today?  They show lot of rain spikes in early July which didn't happen.  So in the last over 1 month GFS ensembles had been very poor with the low uppers and huge daily rain spikes, haven't seen them making it flat lined dryness since the start of the dry spell.

Jiries
12 July 2018 08:16:06

As if by magic at England's exit from the World Cup, it does look as though our golden summer is coming to an end. All the major models now looking increasingly unsettled with semi-stationary trough parking itself over UK soon. Rain fest is on the way I fear.

Originally Posted by: moomin75 

I check it and it still in the FI range  9-10 days away, still looking very decent this week then some thunderstorm after the hot weekend then some HP days next week before slack LP in the FI appear but nothing to effect badly like last year dartboard LP that sat over us so that might push further away or change.  Over the top misleading statement and not rain fest.  You need a cold dartboard LP to sit over us and nothing showing in the 9-10 days range, just some showers around and decent temps around.  

superteacher
12 July 2018 08:28:30

Yet again people reacting to one set of model runs. People know all of this, but still insist on posting the same cliched lines.

1. It’s al still deep in Fi (9 - 10 days away)
2. GFS precipitation charts are useless.
3. The teleconnections and long term signals do not support a trough parked over or near the U.K.

There may be a blip to less settled weather, but that’s all it may be.

David M Porter
12 July 2018 08:36:04

As if by magic at England's exit from the World Cup, it does look as though our golden summer is coming to an end. All the major models now looking increasingly unsettled with semi-stationary trough parking itself over UK soon. Rain fest is on the way I fear.

Originally Posted by: moomin75 

Two words spring to mind here: "Jumping" and "gun".


Lenzie, Glasgow

"A body of men holding themselves accountable to nobody ought not to be trusted by anybody." – Thomas Paine

Jiries
12 July 2018 08:50:31

Yet again people reacting to one set of model runs. People know all of this, but still insist on posting the same cliched lines.

1. It’s al still deep in Fi (9 - 10 days away)
2. GFS precipitation charts are useless.
3. The teleconnections and long term signals do not support a trough parked over or near the U.K.

There may be a blip to less settled weather, but that’s all it may be.

Originally Posted by: superteacher 

Then on 240hrs chart show Azores HP moving in and to link up with Scandi HP.  There will be some thunderstorms early next week but nothing like last year cold dartboard LP that sat over us non-stop to winter months.  Surprised no posts about the coming hot weekend here as I would see low 30's providing lot of sunshine around.

andy-manc
12 July 2018 09:25:00

The same people have written off summer every day for 2 1/2 months now. Fair enough, it is looking more mixed in the next week or so but beyond that, we have no idea. Forecasts are struggling to get a grip on next week. Changing every day between raining all next week to not at all to one or two days! Looks like it's a day on and a day off this morning. Hoping to keep the temperatures up above 20C and quickly get back to settled conditions.

I'm in York this weekend. Looking good for that :)

speckledjim
12 July 2018 11:17:38

The same people have written off summer every day for 2 1/2 months now. Fair enough, it is looking more mixed in the next week or so but beyond that, we have no idea. Forecasts are struggling to get a grip on next week. Changing every day between raining all next week to not at all to one or two days! Looks like it's a day on and a day off this morning. Hoping to keep the temperatures up above 20C and quickly get back to settled conditions.

I'm in York this weekend. Looking good for that :)

Originally Posted by: andy-manc 

 

That's moomin75 for you, he does it all the time.


Thorner, West Yorkshire



Journalism is organised gossip

Rob K
12 July 2018 11:25:59
The 06Z GFS doesn't really look like a "summer's over" run to me.
Yateley, NE Hampshire, 73m asl

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Saint Snow
12 July 2018 11:32:41

The 06Z GFS doesn't really look like a "summer's over" run to me.

Originally Posted by: Rob K 

 

Nor to me.

The actual charts seem pretty OK out to around the 240z mark (GFS then brings in Atlantic dirge from the NW after that), with strong ridging from the AH, and even hints of high pressure to our E/NE developing, which if it came off would, you'd assume, bring back that stable block scenario. Nothing particularly hot, but pleasant-looking.

The GEFS show a fair amount of rain around, so perhaps that's where people are getting the doom from.

 


Martin

Home: St Helens (26m asl) Work: Manchester (75m asl)

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marco 79
12 July 2018 11:34:39
06 has a continuation of the omega block....apart from some localised showers over the next few days...the outlook continues dry and very warm for most of UK...
Home : Mid Leicestershire ...135m ASL
moomin75
12 July 2018 11:35:41

 

 

That's moomin75 for you, he does it all the time.

Originally Posted by: speckledjim 

Well, I haven't actually, but hey let's not let the facts spoil your rhetoric eh?


Witney, Oxfordshire

100m ASL

Col
  • Col
  • Advanced Member
12 July 2018 11:39:50

The 06Z GFS doesn't really look like a "summer's over" run to me.

Originally Posted by: Rob K 

Indeed it doesn't. Certainly not bone dry ,looks warm & somewhat showery to me. Looks like the best GFS run I've seen for some days, gone are the LPs sitting over us, there have been some quite nasty looking charts (albeit in FI) just recently. If only the Azores high was more 'ridgey' and properly linked up with the Scandy high, but it never quite manages it.


Col

Bolton, Lancashire

160m asl

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Hungry Tiger
12 July 2018 14:09:43

 

 

Nor to me.

The actual charts seem pretty OK out to around the 240z mark (GFS then brings in Atlantic dirge from the NW after that), with strong ridging from the AH, and even hints of high pressure to our E/NE developing, which if it came off would, you'd assume, bring back that stable block scenario. Nothing particularly hot, but pleasant-looking.

The GEFS show a fair amount of rain around, so perhaps that's where people are getting the doom from.

 

Originally Posted by: Saint Snow 

Well said.

 


Gavin S. FRmetS.

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South Cambridgeshire. 93 metres or 302.25 feet ASL.



TimS
  • TimS
  • Advanced Member
12 July 2018 16:10:31

I use the GEFS SLP average as a rule of thumb, which usually works well. If it’s clistered above 1015hPa the weather will be relatively dry; below and it’ll be relatively wet.

Proper sundrenched high summer weather happens from 1020 upwards (arguably 1025 if you want it to last), and dartboard lows below 1000. Anything from 1005-1010 in high summer usually equals slow moving convective showers.

I am feeling reasonably pessimistic because the SLP mean has been trending to low 2010s from early next week, for several runs now. Not dartboard lows, but suggestive of unsettled weather. There are no ensemble members taking pressure up to 1025 or anywhere near at any point in the run.

http://www.wetterzentrale.de/en/show_diagrams.php?geoid=49069&model=gfs&var=208&run=06&lid=ENS&bw=

Last month it was consistently showing means at or just under 1020 for most of 180-384hrs.

06z was actually a small improvement on the last few, longer term.


Brockley, South East London 30m asl

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