DEW
  • DEW
  • Advanced Member
24 April 2024 17:06:12
Originally Posted by: Viking3 

 The chart shows the annual percentage of winds from SW, ranging from just 15% in 2010 up to 31% in 1990. I've added a 15-year average and this shows that SW winds have been more prevalent in the second half of the series compared to the first half.

See the chart here 



Interesting, and thanks for the effort.

SW winds on the 15-year average are, yes, more prevalent, but to be miserable and 'rain on your parade', is the difference significant?

To my eye, the change has been from having some years in the last millennium with a high proportion of SW-lies, and equally some without, to this millennium with years in which the year-on-year variation is much smaller. Since the human memory is selective and more readily retains extreme events, I wonder if all those high values in the last millennium have been condensed into a perception of every year, from 20 years ago, having frequent SW-lies?
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
doctormog
24 April 2024 18:08:26
This chart seems to sum up the recent weather nicely up here.

IMAGE. Members enable at bottom of page


it would be so good to see some wamrth or at least “warm-feeling” sunshine. 

I think there continue to be signs of an improvement as we head into May but that is still quite uncertain.

The next 24 hr over Central Europe look equally un-springlike. https://modeles16.meteociel.fr/modeles/gensp/run/gensprob-26-24.png?12 

 Nothing unprecedented of course just unwelcome given the weeks that have preceded it.
Jiries
24 April 2024 18:28:29
Originally Posted by: doctormog 

This chart seems to sum up the recent weather nicely up here.

IMAGE. Members enable at bottom of page


it would be so good to see some wamrth or at least “warm-feeling” sunshine. 

I think there continue to be signs of an improvement as we head into May but that is still quite uncertain.

The next 24 hr over Central Europe look equally un-springlike. https://modeles16.meteociel.fr/modeles/gensp/run/gensprob-26-24.png?12 

 Nothing unprecedented of course just unwelcome given the weeks that have preceded it.



At least in Europe they had decent warm weather that we did not get any in here and it normal for April with wide swings and you have confident it will warm up asap than here zero confident to get anything remotely warm enough.
Viking3
24 April 2024 19:17:13
Originally Posted by: DEW 

Interesting, and thanks for the effort.

SW winds on the 15-year average are, yes, more prevalent, but to be miserable and 'rain on your parade', is the difference significant?

To my eye, the change has been from having some years in the last millennium with a high proportion of SW-lies, and equally some without, to this millennium with years in which the year-on-year variation is much smaller. Since the human memory is selective and more readily retains extreme events, I wonder if all those high values in the last millennium have been condensed into a perception of every year, from 20 years ago, having frequent SW-lies?



It was a very coarse analysis of course! Doesn't say anything about what weather occurred with those SW winds, and it would need to include other parameters such as dewpoint, 850mb temperature and precipitation to try and tease out a more nuanced picture. Having said that the Open-Meteo interface will do that in a few seconds so it's certainly feasible.
Keith
Aboyne, Aberdeenshire
135m asl
Ally Pally Snowman
24 April 2024 19:23:10
Lots of high pressure on the 12s but in the wrong place for us Easterners. North Sea muck. 
Bishop's Stortford 85m ASL.
Chunky Pea
24 April 2024 20:03:11
Some great data by Viking about using that great site. I tested wind direction data for my own location regarding winds from an easterly direction (>45 / <135) there has been very little change in frequency between each decade since the 50s, which is surprising to me. 

Decade / % of hours with easterlies
50s: 15.19
60s: 15.26
70s: 16.06
80s: 16.13
90s:15.89
00s:15.78
10s:15.91

Only the slightest uptick during 70s and 80s, with the last 3 decades (up to the end of 2019) more or less the same. 
Current Conditions
https://t.ly/MEYqg 


"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
Jiries
24 April 2024 20:44:03
Originally Posted by: Ally Pally Snowman 

Lots of high pressure on the 12s but in the wrong place for us Easterners. North Sea muck. 



Isn't the only way we can get more dryness and sunshine out of it?  They always clear off around 10am to 11am including the SE when i lived there before which is nearer to the east than W Midlands, we get clear skies around 10am average clearance.
Ally Pally Snowman
25 April 2024 05:27:13
Horrific output continues.  2024 the year without a Spring! 
Bishop's Stortford 85m ASL.
DEW
  • DEW
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25 April 2024 07:06:09
WX temps taking two steps back this morning. For week 1, near-average temps in E Europe but below in W Europe incl Britain, and then in week 2 (unlike yesterday) the whole of the continent north of the Alps and Hungary becoming cooler, with some near-freezing weather becoming more extensive into the Baltic. Rain mostly in France in week 1, with some overspill into Britain; generally quite wet except for Spain week 2.

GFS Op - large but shallow LP on the eastern side of the N Sea moving west and combining with the Atlantic to be located over Britain by the weekend, continuing to affect the western coast until Thu 2nd when it moves to S France, pressure rising over Britain but the E-lies are back. Then from Sun 5th to end (Sat 11th) a series of LPs run across or near to N Scotland with winds backing first N-ly then W-ly. 

ECM - similar to GFS though the LP is located further N, over Biscay/N France, with stronger E-lies for Britain.

GEFS - temps rising to slightly above norm by Wed 1st (good agreement between ens members), dropping back to slightly below by Mon 6th (fair agreement) and predictions then spreading over a wide range. Some rain in many runs on many days, most likely to be heavy around Sun 28th for all except far NW where more persistent over a longer period.
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
Matty H
25 April 2024 08:29:03
Originally Posted by: Ally Pally Snowman 

Horrific output continues.  2024 the year without a Spring! 



Yep, absolutely dreadful. There’s not even any real hint across the models of anything remotely spring/summer-like in the offing
Essan
25 April 2024 08:57:49
Originally Posted by: Ally Pally Snowman 

Horrific output continues.  2024 the year without a Spring! 



Spring?  I'm still waiting for winter .....
Andy
Evesham, Worcs, Albion - 35m asl
Weather & Earth Science News 

Anyone who is capable of getting themselves made President should on no account be allowed to do the job - DNA
Saint Snow
25 April 2024 09:33:44
Originally Posted by: Essan 

Spring?  I'm still waiting for winter .....




And where was last summer?

😄


It's basically been November for the last 18 months

Martin
Home: St Helens (26m asl) Work: Manchester (75m asl)
A TWO addict since 14/12/01
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sunny coast
25 April 2024 16:13:00
Originally Posted by: Saint Snow 

And where was last summer?

😄


It's basically been November for the last 18 months




It was hot last June and at times September ! 
doctormog
25 April 2024 16:38:22
Still signs of things warming up to something more akin to average/springlike as we move into May. The next few days are still on the cool side but tentative signs of something better beyond that, more so in the ensembles and GFS runs than the ECM op runs so caution is needed.
Retron
25 April 2024 16:48:43
Originally Posted by: sunny coast 

It was hot last June and at times September ! 


How quickly people forget, eh?

Here's the CET graph for last year. June was astonishingly warm, with a few records set, as was September. August was your standard "average" (for 91-20) month, i.e. warm compared to the 61-90 averages, and July... started hot, but was then a little below average for most (it was around average here).

https://www.metoffice.gov.uk/hadobs/hadcet/graphs/2023/daily_maxtemp_cet_2023.png 


Only one day last summer managed to get into the bottom 5% of all time temperatures, whereas there were loads (as usual) in the top 5%... and that goes back centuries, remember!

Back to the models, and there's no doubt about it - we'll be recording another warmer than average month, which will be 16 in a row. Will the streak finally break in May? Not much chance of that, and I note the Met Office text forecast contains the somewhat ominous (from my POV) text saying:

Temperatures likely to trend upwards, with the chance of a warm to very warm spell in some southern and eastern parts,

and for the longer range bit, a reminder of what we expect at this time of year:

Also worth noting that average temperatures themselves rise by around 1C per week at this time of year.

In other words, it'll get warmer regardless of whether we remain in a northerly flow. Certainly the GFS isn't at all keen to move the jet north, which is quite unusual at this time of year!
 
Leysdown, north Kent
fairweather
25 April 2024 18:20:16
I must be mis-interpreting the charts? Certainly no Spring heatwave but surely much milder, especially in any sun and less windy? The Azores High is heading this way and may nudge the odd ridge in our direction. Bearing in mind, here at least, the mean has been 13C for the last ten days with no max above 15C, hardly any sun and mostly dull and windy. Yes, there may be some rain about, but surely an improvement and better than the last few months?
S.Essex, 42m ASL
DEW
  • DEW
  • Advanced Member
26 April 2024 07:33:13
WX charts have suddenly developed a dose of optimism. Week 1 shows NW Europe still cool but with things beginning to warm up over Poland, more so than yesterday; then in week 2 much milder weather spreads to the whole of continental Europe (14-16C 24hr average). It doesn't quite cross the Channel but Britain is nevertheless milder than shown yesterday. The rainfall pattern has changed too - in week 1 mainly on the Atlantic near SW Britain and into France; in week 2 for the Atlantic near NW Britain and into Norway. The very dry areas are Poland and then further east.

GFS Op - The current slack LP over Britain hangs around until Wed 1st, mostly around the west, before departing S-wards as pressure rises from the SE and more strongly from the NW. Then a brief intrusion of LP from Norway Sun 5th before HP 1020mb Low Countries Mon 6th brings up strong S-lies, and after LP has had a final bite at NW Scotland the Azores HP is strongly established 1030mb southern N Sea Sat 11th.

ECM - something like GFS at first though the initial LP spends more time in the SE at the weekend before moving to the west and disappearing south. The rise in pressure following is less marked by Sun 5th and in contrast originates from the NE and SW with no LP from Norway.

GEFS - becoming mild after Wed 1st with good ens agreement but after Sun 5th any agreement disappears, mean chugs on near norm but e.g. in the S Thu 9th op is very warm 8C above norm, control is 6C below, similar but less extreme in N. In the S runs have rain Sun 28th or thereabout, some rain likely in many runs around Wed 3rd, otherwise on the dry side; in the N there is less rain but could occur any time. 
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
Caz
  • Caz
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26 April 2024 07:56:37
I’m really looking for a rise in temperature for the Bank Holiday weekend.  Our son. daughter-in-law and 2 year old granddaughter are going glamping on the East Coast.  Rather them than me!  
Market Warsop, North Nottinghamshire.
Join the fun and banter of the monthly CET competition.
GezM
  • GezM
  • Advanced Member
26 April 2024 08:01:55
Mild to warm weather looks set to return for a few days next week but I'd not get carried away with the 0z GFS Ops run just yet. It is a significant outlier between May 7 and 9 down south.

Incidentally I've noticed in recent months that ECM picks up on the mild/warm spells more accurately than GFS at a 5 to 10 day range. This is happening again now with the 1st week in May bump. ECM was showing 5C 850 means a few days ago while GFS is only just moving up there having previously shown more like 2-3C. I suppose it hasn't verified yet though! 
Living in St Albans, Herts (116m asl)
Working at Luton Airport, Beds (160m asl)
Martybhoy
26 April 2024 18:29:28
IBM are forecasting 18 degrees and sunshine for Friday next week for me. First time I’ve seen anything resembling it this spring. 

also hardly any rain in my forecast for the foreseeable.
200m above sea level
Rural East Ayrshire
Near to the village of Sorn
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