The Weather Outlook

Remove ads from site

Polar Low
21 May 2018 18:35:41

  Good grief ecm

anom 850 168

 

Arcus
21 May 2018 18:39:24
Looks potentially very disturbed for some parts in southern England over the BH weekend if the GFS 12z is anything to go by. -11 LI with >= 3,000 SBCAPE. Could all change natch, and GFS is, as ever, often over-enthused on the extremes.
Ben,

Nr. Easingwold, North Yorkshire

30m asl

Arcus
21 May 2018 18:40:01

Comedy value only:


Ben,

Nr. Easingwold, North Yorkshire

30m asl

Phil G
21 May 2018 18:52:35
GFS has been quite bullish Ben in the last few runs of high Cape values.
Arcus
21 May 2018 19:01:23

GFS has been quite bullish Ben in the last few runs of high Cape values.

Originally Posted by: Phil G 

Yep, it has - but as I mentioned these extreme values often get moderated nearer the time as GFS rolls forward. It's a long way off, but other models seem to be looking at the warm humid feed setting in for the BH weekend on the 12zs at least. However I wouldn't be surprised to see the flow moderated in subsequent runs. All very interesting though. 

EDIT: And I'd love to see the first ever MetO "Thunderstorm Warning" if it does come to fruition. 


Ben,

Nr. Easingwold, North Yorkshire

30m asl

LA2B MeridFlowEuro09
21 May 2018 19:09:11

The next weekend and the following Monday look very hot and thundery acooring to the UKMO, GFS and ECMWF 12z’s.

More heat and convection and mid to upper level instabillity looks ripe for big and loud storms and local torrential heavy downpours.

Tomorrow Tuesday to Friday there is also quite a good chance of very warm and thundery weather indeed.

Mouthwatering charts.


Climate is warming up, Scotland and N Ireland and North England still often gets some Winter frost, ice and snow, November to March, but the SE and South UK including S Central England and Wales, together with the West and North through the year, they sometimes get more rain than London and S SE England, where some longer dry fine spells without much heavy rain is seen every year.

The North Atlantic Sea often gets some much Colder Wintry conditions from November to March Months, and Mild SW and South winds tend to be more frequent over the East and SE of North Atlantic Sea, as the Azores High tends to stay in charge.Β 

With this warmth and heat, the Central and South UK has become mostly free of snow and frost.

Chunky Pea
21 May 2018 19:10:29

Increasingly thundery ECM tonight, especially towards the weekend and early next week. 


Patrick,

East Galway, Ireland.

Polar Low
21 May 2018 19:17:18

Bank Lab

No chart available for the selected hour. Many charts start at 3 hours ahead, so if you have 0 hours selected try stepping forward or selecting a later hour.

No chart available for the selected hour. Many charts start at 3 hours ahead, so if you have 0 hours selected try stepping forward or selecting a later hour.

 

The next weekend and the following Monday look very hot and thundery acooring to the UKMO, GFS and ECMWF 12z’s.

More heat and convection and mid to upper level instabillity looks ripe for big and loud storms and local torrential heavy downpours.

Tomorrow Tuesday to Friday there is also quite a good chance of very warm and thundery weather indeed.

Mouthwatering charts.

Originally Posted by: No chart available for the selected hour. Many charts start at 3 hours ahead, so if you have 0 hours selected try stepping forward or selecting a later hour.MeridFlowEuro09 

Solar Cycles
21 May 2018 20:00:14

GFS has been quite bullish Ben in the last few runs of high Cape values.

Originally Posted by: Phil G 

It was generally the first to pick out trends during the past winter so it may well just be onto something here.

White Meadows
21 May 2018 21:22:06
The heatwave starts Saturday, going from tonight’s 18z. Supportive of today’s ensembles picture with rising temps we’ll into June.

Not looking too hot for my trip to the Ballerics next month though:

http://www.cpc.ncep.noaa.gov/products/CFSv2/imagesInd3/euT2mMonInd1.gif 

LA2B MeridFlowEuro09
22 May 2018 04:12:50

Latest early update from a la GFS.

The Tunisian Plume and SE E Spain and SW Europe Zephyr Spanish Plume associated with a very unstable Thundery Heat Low is shown to move to SW and S France from the aforementioned areas as the model run has shown progressing from t00 to t78..

On Thursday and Friday 24th and 25th May the East SE flow over South and SE England is quite well positioned.

A very good Scandy North And NE Europe Blocking High fed by further cells of the Azores High from outside of W and NW of Bay of Biscay.

The 15-20 degrees C T850’s and the plume of 564 dam air along with a mixed upper and mid level boundary layer and strong wind sheer in Spain SW S France in the 48-72 hr period looks like heading towards Southern UK indeed by Saturday to Monday 26th to 28th May.  I have not looked at the CAPE and LI from the 00z GFS today but as Low Pressure seems to be the big player here as well as the Azores Scandy High- there could well be a good chance of torrential rain and severe MCS storms with possible tornado’s in some parts as well.

πŸ˜‰πŸ˜ƒπŸ˜Žβ›ˆβ˜”οΈπŸŒͺβš‘οΈπŸ’¦πŸŒ«. Let’s see how this develops over the next 5 days.


Climate is warming up, Scotland and N Ireland and North England still often gets some Winter frost, ice and snow, November to March, but the SE and South UK including S Central England and Wales, together with the West and North through the year, they sometimes get more rain than London and S SE England, where some longer dry fine spells without much heavy rain is seen every year.

The North Atlantic Sea often gets some much Colder Wintry conditions from November to March Months, and Mild SW and South winds tend to be more frequent over the East and SE of North Atlantic Sea, as the Azores High tends to stay in charge.Β 

With this warmth and heat, the Central and South UK has become mostly free of snow and frost.

LA2B MeridFlowEuro09
22 May 2018 04:32:00

Latest early update from a la GFS.

The Tunisian Plume and SE E Spain and SW Europe Zephyr Spanish Plume associated with a very unstable Thundery Heat Low is shown to move to SW and S France from the aforementioned areas as the model run has shown progressing from t00 to t78..

On Thursday and Friday 24th and 25th May the East SE flow over South and SE England is quite well positioned.

A very good Scandy North And NE Europe Blocking High fed by further cells of the Azores High from outside of W and NW of Bay of Biscay.

The 15-20 degrees C T850’s and the plume of 564 dam air along with a mixed upper and mid level boundary layer and strong wind sheer in Spain SW S France in the 48-72 hr period looks like heading towards Southern UK indeed by Saturday to Monday 26th to 28th May.  I have not looked at the CAPE and LI from the 00z GFS today but as Low Pressure seems to be the big player here as well as the Azores Scandy High- there could well be a good chance of torrential rain and severe MCS storms with possible tornado’s in some parts as well.

πŸ˜‰πŸ˜ƒπŸ˜Žβ›ˆβ˜”οΈπŸŒͺβš‘οΈπŸ’¦πŸŒ«. Let’s see how this develops over the next 5 days.

Originally Posted by: LA2B MeridFlowEuro09 

Update: 

Low Pressure to cross Spain and then France and then the UK, Moderate to Strong Easterly winds with High Pressure over North and NE and NW UK North and NE Europe, and very warm to hot weather - there could be some cloudy weather with South SE UK seeing increasing chance of heavy thundery storm showers- there could be some big hail and tornado’s can be possible and strong easterly winds. Sunshine would be less possible in this setup, though still hot and humid, but some dry air as well.  GFS and UKMO 00z runs have  UK and West Europe dominated by Active thundery Low with winds easterly for S and SE UK North and NE France English Channel blowing straight from Germany and Denmark et all.β˜”οΈβ›ˆπŸŒ¨πŸ˜…πŸ˜†. 


Climate is warming up, Scotland and N Ireland and North England still often gets some Winter frost, ice and snow, November to March, but the SE and South UK including S Central England and Wales, together with the West and North through the year, they sometimes get more rain than London and S SE England, where some longer dry fine spells without much heavy rain is seen every year.

The North Atlantic Sea often gets some much Colder Wintry conditions from November to March Months, and Mild SW and South winds tend to be more frequent over the East and SE of North Atlantic Sea, as the Azores High tends to stay in charge.Β 

With this warmth and heat, the Central and South UK has become mostly free of snow and frost.

Phil G
22 May 2018 07:57:34
GFS continues the theme this morning and smacks of high humidity, big storms and possible flash flooding in places from the weekend well into next week.
LA2B MeridFlowEuro09
22 May 2018 08:35:54

Update from ECMWF 00z run.

It looks hot and thundery with Sunny spellls and some big and small or widespread scattered thundery showers and SE winds in charge, easterly’s turn SE they then turn lighter but as we go through next week it is expected to continue with some thundery showers and sunny spells and or periods, ligh winds.  This can be said for much of the UK for the aforementioned period.


Climate is warming up, Scotland and N Ireland and North England still often gets some Winter frost, ice and snow, November to March, but the SE and South UK including S Central England and Wales, together with the West and North through the year, they sometimes get more rain than London and S SE England, where some longer dry fine spells without much heavy rain is seen every year.

The North Atlantic Sea often gets some much Colder Wintry conditions from November to March Months, and Mild SW and South winds tend to be more frequent over the East and SE of North Atlantic Sea, as the Azores High tends to stay in charge.Β 

With this warmth and heat, the Central and South UK has become mostly free of snow and frost.

Gavin P
22 May 2018 09:38:57

I await one of Gav’s video over the next couple of weeks on this very matter. 😎

Originally Posted by: Solar Cycles 

 

GWV Winter 18/19 NAO Forecast will be released on 1st July... Have a feeling this one will be eagerly awaited. 


Rural West Northants 120m asl

Short, medium and long range weather forecast videos @ https://www.youtube.com/user/GavsWeatherVids

bledur
23 May 2018 08:11:44

Low pressure looking closer than earlier forecast.

moomin75
23 May 2018 16:33:59
Viewing TWO viewer at the precip over the next few weeks, there seems to be an awful lot of it around, despite pressure looking high. Not sure I understand why it's showing so much rain.
Witney, Oxfordshire

100m ASL

Ally Pally Snowman
23 May 2018 16:55:22

Viewing TWO viewer at the precip over the next few weeks, there seems to be an awful lot of it around, despite pressure looking high. Not sure I understand why it's showing so much rain.

Originally Posted by: moomin75 

 

It's looking less settled than it was could be some heavy thundery rain around.  Very warm though if not hot could hit 30c somewhere next week.

Meto forecast for June looks a bit dodgy though but we'll see jury's out for now.

 


Bishop's Stortford 85m ASL.
Arcus
23 May 2018 20:54:02

Viewing TWO viewer at the precip over the next few weeks, there seems to be an awful lot of it around, despite pressure looking high. Not sure I understand why it's showing so much rain.

Originally Posted by: moomin75 

It's all relative. High pressure will cap instability but is never an ultimate block on convection if other factors (moisture, instability, forcing) come into play.


Ben,

Nr. Easingwold, North Yorkshire

30m asl

DEW
  • DEW
  • Advanced Member
24 May 2018 06:45:57

 

It's looking less settled than it was could be some heavy thundery rain around.  Very warm though if not hot could hit 30c somewhere next week.

Meto forecast for June looks a bit dodgy though but we'll see jury's out for now. 

Originally Posted by: Ally Pally Snowman 

Quite a number of trough lines appearing more or less randomly in the fax charts over the next few days, but so far (in this area at least) these have promised more than they've actually delivered. For instance, the trough which was upgraded to a front for the south coast this morning is only producing the odd shower here and there. Difficult forecasting territory, I know, but I think that the high CAPE levels which were posted a few days back, although giving rise to some storms, may not deliver as much as promised.

Further ahead, both GFS and ECM show an interesting small cold pool and associated low pressure developing in mid-Atlantic next Wed (31st) which then ambles around for the next few days without getting much larger. GFS brings it in over the UK, ECM shunts it off to Norway.


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

moomin75
24 May 2018 16:51:40

12z looking definitively more unsettled now....sadly this super spell is behind us for now.


Witney, Oxfordshire

100m ASL

Tim A
24 May 2018 16:57:51
Outlook looks good, slack winds, no atlantic influence and warmer than average temperatures.
Tim

NW Leeds

187m asl

Β My PWS 

moomin75
24 May 2018 17:06:24

Outlook looks good, slack winds, no atlantic influence and warmer than average temperatures.

Originally Posted by: Tim A 

Outlook looks thundery and unsettled with lots of slow moving showers.


Witney, Oxfordshire

100m ASL

TimS
  • TimS
  • Advanced Member
24 May 2018 17:09:27
It’s been a slow but steady downgrade over several runs. Could always start to go back in the opposite direction again of course.
Brockley, South East London 30m asl
Arcus
24 May 2018 17:14:40

Outlook looks good, slack winds, no atlantic influence and warmer than average temperatures.

Originally Posted by: Tim A 

Yep, compared to what we could be facing at this time of the year it looks pretty good up here for the reliable future IMO (tomorrow's blip aside).


Ben,

Nr. Easingwold, North Yorkshire

30m asl

Remove ads from site