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Bolty
  • Bolty
  • Advanced Member Topic Starter
23 September 2023 22:34:59
I think this merits its own thread now.

The models are hinting at potentially quite a severe Atlantic storm on Wednesday afternoon. The exact track will not be known for some time, but there's a good chance that both the UK and Ireland will be affected, with gusts potentially over 60-70mph quite widely. Such a strong wind will be especially more problematic now because many trees are still in full leaf in late September, so it could be quite damaging to say the least. If these signals persist, it will almost certainly be the first named storm of the season.

18Z GFS has the worst of the winds hitting Northern England and southern Scotland on Wednesday afternoon.

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Scott
Blackrod, Lancashire (4 miles south of Chorley) at 156m asl.
My weather station 
The Beast from the East
23 September 2023 22:38:08
Seems model agreement for a more northerly track thank god for us southerners 
Purley, Surrey, 70m ASL

"We have some alternative facts for you"

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Bolty
  • Bolty
  • Advanced Member Topic Starter
23 September 2023 22:42:56

Seems model agreement for a more northerly track thank god for us southerners 

Originally Posted by: The Beast from the East 



That can very easily change, especially at this stage. I've seen these storms take a completely different path to what they were forecasted to take just a few hours before they've been due to hit.
Scott
Blackrod, Lancashire (4 miles south of Chorley) at 156m asl.
My weather station 
DEW
  • DEW
  • Advanced Member
24 September 2023 07:34:20
Ex TS Ophelia paying a visit having caused serious floods in the eastern USA
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
Brian Gaze
24 September 2023 08:29:15
Decent agreement on it heading across the north. GEFS and MOGREPS-G.

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Brian Gaze
Berkhamsted
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The Beast from the East
24 September 2023 08:47:17

That can very easily change, especially at this stage. I've seen these storms take a completely different path to what they were forecasted to take just a few hours before they've been due to hit.

Originally Posted by: Bolty 



THankfully for us no change this morning. Still time of course, but it seems the azores ridge is saving us and sending it further north, 
Purley, Surrey, 70m ASL

"We have some alternative facts for you"

Kelly-Ann Conway - former special adviser to the President
doctormog
24 September 2023 08:48:17
It looks potentially very windy in SW parts (most notably parts of Ireland) early on Wednesday before the windy weather spreading across many areas further north. Definitely worth watching over the next couple of days to see how the projected track develops.
Jiries
24 September 2023 09:35:48

THankfully for us no change this morning. Still time of course, but it seems the azores ridge is saving us and sending it further north, 

Originally Posted by: The Beast from the East 



That what happened in Oct 1987 was not forecasted to be stormy including M Fish didn't believe it will come. but look what happened by then.  For this one will not be interesting to me, i prefer Autumns storms type like they get in other countries with lightning, thunder, hail and temperatures fall quickly.  just a bog standard wet and windy that I see all year around.

Autumn is a season of death and most boring season of the year plus with winter time since it staying Autumnal.   Storm Hilary that hit Death Valley are far more interesting stats than this coming week storm.
NMA
  • NMA
  • Advanced Member
24 September 2023 09:58:21
Not sure where to put this. Has anyone else noticed the colours on Brian's radar page seem more saturated than before? https://www.theweatheroutlook.com/twodata/uk-rainfall-radar.aspx 
My monitor is the same and any work I do in Photoshop is as it should be.
Nick
Vale of the Great Dairies
South Dorset
Elevation 60m 197ft
ozone_aurora
24 September 2023 10:02:17

Not sure where to put this. Has anyone else noticed the colours on Brian's radar page seem more saturated than before? https://www.theweatheroutlook.com/twodata/uk-rainfall-radar.aspx 
My monitor is the same and any work I do in Photoshop is as it should be.
Nick

Originally Posted by: NMA 


Yes, I have, too. The default opacity has been changed to 100. It can be changed to whatever you would like it as. 🙂
Chunky Pea
24 September 2023 11:03:04
Looks as if 'the eye' will pass somewhere close to me ensuring that I'll miss out yet again, much like with the last Ophelia and multiple other storms before and since. 😏
Current Conditions
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Chunky Pea
24 September 2023 11:09:34


Autumn is a season of death and most boring season of the year plus with winter time since it staying Autumnal.   .

Originally Posted by: Jiries 



Early spring definitely the most boring period of the year. It is devoid of any life, pleasant warmth or real cold. 
Current Conditions
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"You don't have to know anything to have an opinion"
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Bolty
  • Bolty
  • Advanced Member Topic Starter
24 September 2023 12:15:32
The Met Office have issued a yellow warning for 10:00 on Wednesday to 07:00 on Thursday for everywhere bar South East England and northern Scotland.

I expect it will get upgraded nearer the time:

https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings#?id=7d1a0b38-afd9-4dbd-b9d7-0085e013af8a&date=2023-09-24 
Scott
Blackrod, Lancashire (4 miles south of Chorley) at 156m asl.
My weather station 
GezM
  • GezM
  • Advanced Member
24 September 2023 13:00:53

Early spring definitely the most boring period of the year. It is devoid of any life, pleasant warmth or real cold. 

Originally Posted by: Chunky Pea 



I love early spring. First signs of new life with snowdrops and crocuses. Sun gradually getting stronger and no leaves on trees to block out the sunshine. February and March often have the most varied weather too.
Living in St Albans, Herts (116m asl)
Working at Luton Airport, Beds (160m asl)
The Beast from the East
25 September 2023 10:08:41
06z seems to have the storm a bit further north but the secondary feature on thursday is now looking a bit concerning for the south. after that then a potential mini heatwave
 
Purley, Surrey, 70m ASL

"We have some alternative facts for you"

Kelly-Ann Conway - former special adviser to the President
johncs2016
25 September 2023 10:44:51
Personally, I find all of this talk about the country being hit by Storm Agnes on Wednesday a bit premature, especially since there are certain sections of the media which are going on about it as though that was completely nailed in, and 100% guaranteed to actually happen.

As we all know full well, nothing is ever completely "nailed in" when it comes our weather. For that, we usually go by what the model output is telling us about what the weather might be like at a certain point of time in the future, but that is never anything more than a mere prediction for that.

The technology behind all of that has got a lot better over the years and continues to get better over time but even with that, we are still yet not at the stage where we can actually guarantee that we will definitely get a certain type of weather at a certain time.

It is true that can get occasions when it is odds on that it will rain in a couple of hours' time (just as an example) and on the vast majority of those occasions, it usually will end up raining. However, even those forecasts are capable of going badly wrong at the very last minute (sometimes even with the result that it hasn't actually rained at all, has had been forecast or expected) and that is why even these are just "forecasts" at the end of the day, and not actual statements about what will actually happen.

As regards to this week's events, they could well end up happening as forecast but the effects of that could could also equally be even worse then expected, or being not as bad as expected. If this upcoming weather event doesn't end up being as bad as expected, there is a good chance that such a forecast will be downgraded closer to the time as result.

That would make it less likely that any amber or higher level official warnings would actually be issued by the Met Office which in turn, would therefore reduce the risks of any storm actually being officially named as a result.

Finally, any assumption about Storm Agnes being made is just an assumption that this storm is named by either the British (i.e. the Met Office), the Irish (i.e. Met Eireann) or the Dutch because such a storm can only be officially named as Storm Agnes if it was one of three organisations which actually named it.

If the worst affected areas end up being one of those three countries, that will usually end up being the case. However, even that prognosis can easily change as the general model output changes. Because of that, it might not necessarily be the British, Irish or Dutch which actually names and if it is a different country outside of those three, such a Storm will not then be named as Storm Agnes.

If that ends up being the case, its actual name will depend on which country actually named it, and that is something which tends to happen quite a lot. When you add all of that together, it would be much better if the general media just waited for a bit longer to see what actually happens, rather than just more or less blindly assuming that we are actually going to get Storm Agnes on Wednesday. 
The north of Edinburgh, usually always missing out on snow events which occur not just within the rest of Scotland or the UK, but also within the rest of Edinburgh.
Gavin D
25 September 2023 11:03:34
Named as storm Agnes
johncs2016
25 September 2023 11:21:11

Named as storm Agnes

Originally Posted by: Gavin D 



Yes, I have now noticed that the UK Met Office have officially named that system as Storm Agnes and updated their website accordingly, but this has only really happened in the last few minutes and I still think that the media should waited until that moment when this official naming had happened, before more or less just blindly assuming that this was actually going to happen.

Still, that's the media for you and as we all know, it is by doing this sort of stuff that they make all of those billions of pound which they end up making.

However, at least this has now been done right at the start of the storm naming season and  that we've therefore, not had to wait for almost an entire year for Storm Agnes as we did with Storm Antoni.
 
The north of Edinburgh, usually always missing out on snow events which occur not just within the rest of Scotland or the UK, but also within the rest of Edinburgh.
DEW
  • DEW
  • Advanced Member
26 September 2023 06:28:58
FAX has 974 mb SW Ireland Wed 1200 moving to 983mb Hebrides Thu 0000
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
johncs2016
26 September 2023 15:46:54
I've just been watching the latest deep dive video on the Met Office's main YouTube channel, and there is quite a good explanation there as to how and why Storm Agnes was named separately as a completely new storm instead of just being officially regarded as being the remnants of Tropical Storm Ophelia.

That is certainly worth watching.
The north of Edinburgh, usually always missing out on snow events which occur not just within the rest of Scotland or the UK, but also within the rest of Edinburgh.
Chunky Pea
26 September 2023 16:17:29

FAX has 974 mb SW Ireland Wed 1200 moving to 983mb Hebrides Thu 0000

Originally Posted by: DEW 


Looks likely the centre will pass directly over me. Would love to time-lapse the cloud scapes during its crossing but will be at work around the time that it does 😭. Barometric readings will be interesting to observe though. 

​​​​​
Current Conditions
https://t.ly/MEYqg 


"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
Bolty
  • Bolty
  • Advanced Member Topic Starter
26 September 2023 16:34:12
There's something about ex-tropical systems being named "Ophelia" and making it to the UK. They've also been quite interesting systems too.

In 2011, the remnants of Hurricane Ophelia brought an end to the remarkable heat wave at the end of September/start of October. It went from 29°C on the 1st, down to the mid-teens with rain by the 4th.

Then in 2017, the remnants of Hurricane Ophelia dragged up smoke from the wildfires in Portugal which turned the sky yellow and the sun that deep red/copper colour. It was also arguably, about as close to experiencing a true tropical system we have ever gotten in the UK. I remember vividly it still being a Category 1 system when it was passing to the west of France.

I wonder if this incarnation of "Ophelia" will bring anything interesting?
Scott
Blackrod, Lancashire (4 miles south of Chorley) at 156m asl.
My weather station 
Chunky Pea
26 September 2023 18:04:09



Then in 2017, the remnants of Hurricane Ophelia dragged up smoke from the wildfires in Portugal which turned the sky yellow and the sun that deep red/copper colour. It was also arguably, about as close to experiencing a true tropical system we have ever gotten in the UK. I remember vividly it still being a Category 1 system when it was passing to the west of France.

Originally Posted by: Bolty 



Analysis map for the 2017 Ophelia event. Took pretty much the same track as the tomorrow's low is forecast to take. 

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Current Conditions
https://t.ly/MEYqg 


"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
Bagfish
27 September 2023 09:15:36
OK, I'm a complete amateur, but is the low developing a sting jet?  The IR on Sat24 is showing an inclusion of clear air right into the centre of the depression?
https://en.sat24.com/en/eu/infraPolair 
 
Near Kendal, Cumbria
Home 180m asl
Weather Station 

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