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UncleAlbert
20 June 2021 23:13:03
Nice run from the GFS 18Z tonight. Needed cheer after 4 days with no sun here in North Somerset, and no prospect of better on Monday!
Ally Pally Snowman
21 June 2021 07:05:50

Quite unusual output at the  moment lots of high pressure around but a pesky small trough hanging around like a bad smell on some of the output.  Models really  struggling exactly where it ends up.


 


Bishop's Stortford 85m ASL.
moomin75
21 June 2021 07:22:21


Quite unusual output at the  moment lots of high pressure around but a pesky small trough hanging around like a bad smell on some of the output.  Models really  struggling exactly where it ends up.


 


Originally Posted by: Ally Pally Snowman 

Models may be struggling, but I am pretty confident it will end up slap bang over the UK.


Witney, Oxfordshire
100m ASL
DEW
  • DEW
  • Advanced Member
21 June 2021 07:26:26

wx maps showing some improvement in temp week1 (could hardly be worse) and then positively warm inland week2; the Euro monsoon is parked over France and areas S of the M4 look wet for both weeks.


GFS - HP pushing in with main LP area moving S (BBC last night gave 2 competing scenarios for this, one with LP over Italy, good for UK, one over France, not so good). Despite the broad area of HP persisting for a full two weeks, shallow and fairly local embedded LPs, mainly towards the SE, spoil the general outlook one would expect (typically the LPs are 1015mb in an area of 1025mb). Any earlier suggestions of a N-ly or Atlantic influence have disappeared.


GEFS - in the S, temps back to norm Fri 25th and in most runs gradually increasing to ca 3C above norm by end of week 2. Intermittent rain esp in control and op runs. In the N, temps recover a day or two earlier but stay only just above norm. Also rain on and off, but looking more like showery bursts.


ECM - also has a general area of HP for the UK but more of a definite centre over Scotland at 1030mb for the most part. and almost no embedded LP


War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
Jiries
21 June 2021 08:32:07


Quite unusual output at the  moment lots of high pressure around but a pesky small trough hanging around like a bad smell on some of the output.  Models really  struggling exactly where it ends up.


 


Originally Posted by: Ally Pally Snowman 


Since they upgrade the models had gone worse and never come off accurate on the day i observed.  I still expecting warm and sunnier from midweek with low 20's here.

TimS
  • TimS
  • Advanced Member
21 June 2021 10:33:15

Again things look very poor indeed for the foreseeable future. The sad thing is that the macro picture is pretty good, with a Northerward displaced jet. It's these little cutoff lows that are wasting a reasonable pattern.


We desperately need the seasonal shift in the subtropical jet to blast away these lingering June Monsoon troughs. No sign of it yet, certainly over France which is getting soaked.  In fact part of the problem is the subtropical jet is virtually non-existent. Not seen it so week for a long time. The Polar front jet remains fairly strong and very far North, except for its little loop over the British Isles.


Usually the jet shift happens around the week after the solstice, after the Monsoonal shift North of the Himalayas (which has already happened) and the establishment of the large scale heat trough around the Middle East (which also seems to have happened - the Meltemi is up and running over the Aegean). I think we're just very very unlucky this year that the one spot in the Euro-Atlantic region with troughing happens to be our little spot . 



Brockley, South East London 30m asl
Brian Gaze
21 June 2021 10:56:51


Brian Gaze
Berkhamsted
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"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
21 June 2021 11:12:05


Again things look very poor indeed for the foreseeable future. The sad thing is that the macro picture is pretty good, with a Northerward displaced jet. It's these little cutoff lows that are wasting a reasonable pattern.


We desperately need the seasonal shift in the subtropical jet to blast away these lingering June Monsoon troughs. No sign of it yet, certainly over France which is getting soaked.  In fact part of the problem is the subtropical jet is virtually non-existent. Not seen it so week for a long time. The Polar front jet remains fairly strong and very far North, except for its little loop over the British Isles.


Usually the jet shift happens around the week after the solstice, after the Monsoonal shift North of the Himalayas (which has already happened) and the establishment of the large scale heat trough around the Middle East (which also seems to have happened - the Meltemi is up and running over the Aegean). I think we're just very very unlucky this year that the one spot in the Euro-Atlantic region with troughing happens to be our little spot . 



Originally Posted by: TimS 


All looks rather 'meh' than very poor, but I do realise you areliving in a wetter part of the country so that will no doubt have its influence. ECM and GEM both far better than admittedly a poor GFS 06z this morning. 


Could be a lot worse with many northern areas still very dry.


Malcolm UserPostedImage
Wakefield & Gothenburg, SWE
Joe Bloggs
21 June 2021 12:13:00


Again things look very poor indeed for the foreseeable future. The sad thing is that the macro picture is pretty good, with a Northerward displaced jet. It's these little cutoff lows that are wasting a reasonable pattern.


We desperately need the seasonal shift in the subtropical jet to blast away these lingering June Monsoon troughs. No sign of it yet, certainly over France which is getting soaked.  In fact part of the problem is the subtropical jet is virtually non-existent. Not seen it so week for a long time. The Polar front jet remains fairly strong and very far North, except for its little loop over the British Isles.


Usually the jet shift happens around the week after the solstice, after the Monsoonal shift North of the Himalayas (which has already happened) and the establishment of the large scale heat trough around the Middle East (which also seems to have happened - the Meltemi is up and running over the Aegean). I think we're just very very unlucky this year that the one spot in the Euro-Atlantic region with troughing happens to be our little spot . 



Originally Posted by: TimS 


I’ve just run the 00z ECM op run which shows a broad anticyclone pushing in from the west at T+96 becoming a fully fledged UK High for the rest of the run. 


I would challenge your assertion that things are looking “very poor indeed.”



Manchester City Centre, 31m ASL

moomin75
21 June 2021 12:19:28


 


I’ve just run the 00z ECM op run which shows a broad anticyclone pushing in from the west at T+96 becoming a fully fledged UK High for the rest of the run. 


I would challenge your assertion that things are looking “very poor indeed.”


Originally Posted by: Joe Bloggs 

If you are following ECM only, then yes,things don't look so bad.


However, given UKMO and GFS both look poor, I think ECM is off on one and poor sums it up.


Witney, Oxfordshire
100m ASL
Joe Bloggs
21 June 2021 12:21:35

Deleted 



Manchester City Centre, 31m ASL

moomin75
21 June 2021 12:41:53


I remember when this thread used to provide decent analysis, rather than stupid mind games. 


Originally Posted by: Joe Bloggs 

No mind games I promise.


Just trying to give some balance (and probably failing).


There's no doubt ECM looks much better, and GEM isn't bad either, but UKMO and GFS don't look great, and that's just commenting on what is being shown.


Witney, Oxfordshire
100m ASL
Joe Bloggs
21 June 2021 12:56:01

 


deleted 



Manchester City Centre, 31m ASL

Ally Pally Snowman
21 June 2021 13:04:35

 


I wouldn't call these ensembles very poor,  maybe average.  But it's very difficult to make a call on the next 10 days or so as the pesky troughs final destination is completely unknown atm.


 



 


 


Bishop's Stortford 85m ASL.
Joe Bloggs
21 June 2021 13:11:21

Yes Ally - thanks for highlighting the GEFS - a mixed outlook for sure. 


 


I would challenge the assertion that the outlook is looking very poor, and the settled outlook from ECM and GEM provide some evidence that a more balanced view is probably more sensible right about now.


Many northern and western areas are yet to receive any rain btw. 



Manchester City Centre, 31m ASL

moomin75
21 June 2021 13:41:34
Me and Joe have had a heart to heart.
My posts can come across as antagonistic, but they are not meant to.
I was commenting on the other models which look a bit crap.
Hopefully we will have a nice consensus at some point on what the hell is happening next, but I won't hold my breath.
I don't think we are any further advanced in model technology in the last 10 years, ups and downs, swings and roundabouts.

I honestly don't have a clue what the weather will be like in a week's time.
I am hoping it'll be like the ECM is showing. I am dreading it being closer to GFS.

The reality is it will be somewhere in the middle, as per usual.
Witney, Oxfordshire
100m ASL
Joe Bloggs
21 June 2021 13:44:55

Me and Joe have had a heart to heart.
My posts can come across as antagonistic, but they are not meant to.
I was commenting on the other models which look a bit crap.
Hopefully we will have a nice consensus at some point on what the hell is happening next, but I won't hold my breath.
I don't think we are any further advanced in model technology in the last 10 years, ups and downs, swings and roundabouts.

I honestly don't have a clue what the weather will be like in a week's time.
I am hoping it'll be like the ECM is showing. I am dreading it being closer to GFS.

The reality is it will be somewhere in the middle, as per usual.

Originally Posted by: moomin75 


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Manchester City Centre, 31m ASL

TimS
  • TimS
  • Advanced Member
21 June 2021 13:47:10

Let's put this very poor vs OK discussion into some context and see if we can find a way through. My social media today has been filled with colleagues in the North posting pictures of sunny walks up the Pennines (we have a corporate day off), while here in London it's 12C and the rain is bucketing down. So I suspect it's quite possible to look at the same set of models and interpret them in very different ways depending on what's outside the window, as well as the experience of the last 4 days - which have seen almost 80mm fall in large parts of the SE.


What's more look at the actual models themselves and the contrast is stark. We are looking at the same maps and seeing very different outlooks in our backyards.


ECM 00z accumulated rainfall for the length of the run: https://meteologix.com/bo/model-charts/euro/england/accumulated-precipitation/20210701-0000z.html


The other models are wetter but more uniformly so. ECM continues wet for the far S and reasonably dry elsewhere. That rain will be falling on already close to saturated ground.


When you have had such a dire few days of weather and - in my case - just come in from a walk to the shops wearing shirt, hoodie and raincoat and still feeling cold, there is naturally a tendency to disbelieve any hint of improvement in model runs and believe wholeheartedly anything that seems to promise more of the same. 


I do think we need to see the subtropical jet assert itself. When that happens the tendency for troughing over France and Biscay ends to dissipate and the flow becomes more westerly, which should help to blow away the nagging area of low heights around the channel. 


 


 


Brockley, South East London 30m asl
Caz
  • Caz
  • Advanced Member
21 June 2021 16:16:02

Problems arise when people make IMBY posts, which are understandable but it would help if that was stated in the posts to avoid confusion and conflict.  It would also help ‘model numpties’ like me, if we had a bit of analysis and reasoning behind posts, instead of simply saying ‘GFS looks good’ etc.  Please!


Here, between the wet South and sunny North, we’ve had half an hour of drizzle today and six hours of moderate rain on Friday.  Apart from that it’s been dry but mostly cloudy!  


Market Warsop, North Nottinghamshire.
Join the fun and banter of the monthly CET competition.
Downpour
21 June 2021 17:00:21
UKMO keen on a warm weekend for most.
GFS wants it wet in the south.
All eyes on ECM.
Chingford
London E4
147ft
TimS
  • TimS
  • Advanced Member
21 June 2021 17:01:28

Well you'll all be pleased to know this evening's model set so far is every bit as meandering with that indecisive mini-trough as the last lot. All are the same up to Thursday then diverge enough to give very different weekends.


ICON has the slowly sinking trough hanging around and deepening before swinging away at 180hrs with more waiting in the wings; GFS has it loitering to the West with warmish but unsettled weather into the weekend, before moving back across and away over the next few days; UKMO has a concerted attack of high pressure from the West with the trough further into Biscay; GEM is a cross between the good bits of GFS and bad bits of ICON.


Midnight Sunday charts (+ midday Sat UKMO) for comparison. Subtle differences yet very different conditions on the ground.


  


 





Brockley, South East London 30m asl
moomin75
21 June 2021 17:03:07

UKMO keen on a warm weekend for most.
GFS wants it wet in the south.
All eyes on ECM.

Originally Posted by: Downpour 

UKMO doesn't look that settled to me. Looks like a trough and a fair amount of rain on Saturday, possibly drying up a bit by Sunday.


Witney, Oxfordshire
100m ASL
Ally Pally Snowman
21 June 2021 17:04:40

Clear as mud still for the 12z, all 3 models so far handle the trough of doom differently.  GFS has it right over the uk for days. GEM pushes it sw and we get a mini plume. UKMO is more high pressure dominated. 


Bishop's Stortford 85m ASL.
Brian Gaze
21 June 2021 17:06:34


UKMO doesn't look that settled to me. Looks like a trough and a fair amount of rain on Saturday, possibly drying up a bit by Sunday.


Originally Posted by: moomin75 



 



 


Brian Gaze
Berkhamsted
TWO Buzz - get the latest news and views 
"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan

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