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tallyho_83
22 February 2016 17:39:54


 


that first chart has miserable and wet written all over it, the second is marginal to say the least? If it were the beginning of January with already entrenched cold it would be game on, but sadly it's all a bit too late now. 


Still, should be some bright sunshine and sharp frosts to enjoy in the next few days 


Originally Posted by: JACKO4EVER 


It's marginal - the precipitation changes every run as you know: - The last chance for excitement before winter is over!



Home Location - Kellands Lane, Okehampton, Devon (200m ASL)
---------------------------------------
Sean Moon
Magical Moon
www.magical-moon.com


Polar Low
22 February 2016 17:46:25

You have a right to be very good agreement of a easterly of soughts from all its members at t144 just a question how cold if gfs is to be believed


http://www.meteociel.fr/cartes_obs/gens_panel.php?modele=0&mode=1&ech=144


 


 


 


 


LOL.


maybe I'm being too optimistic. We'll soon find out.


 


Originally Posted by: Ally Pally Snowman 

Quantum
22 February 2016 17:51:49


GFS 12z has lots of diving lows with a snow risk remaining and cold at times to.


To far away to put detail on these things though.


Originally Posted by: Charmhills 


Here is the synoptic situation for the GFS 12Z by saturday


frontsat


Note the black lines are troughs, I haven't added them until now because they are really hard in my opinion. Anyway this is my best estimate of the synoptic situation.


An occluded front lies across the SW through parts of Ireland, it is likely that this will give some rather substantial snow in the later case and possibly the former case though snow in cornwall is so rare that I wouldn't bank on it.


Not much use for the rest of us, the whole thing is just so far west.


2023/2024 Snow days (approx 850hpa temp):
29/11 (-6), 30/11 (-6), 02/12 (-5), 03/12 (-5), 04/12 (-3), 16/01 (-3), 18/01 (-8), 08/02 (-5)

Total: 8 days with snow/sleet falling.

2022/2023 Snow days (approx 850hpa temp):

18/12 (-1), 06/03 (-6), 08/03 (-8), 09/03 (-6), 10/03 (-8), 11/03 (-5), 14/03 (-6)

Total: 7 days with snow/sleet falling.

2021/2022 Snow days (approx 850hpa temp):

26/11 (-5), 27/11 (-7), 28/11 (-6), 02/12 (-6), 06/01 (-5), 07/01 (-6), 06/02 (-5), 19/02 (-5), 24/02 (-7), 30/03 (-7), 31/03 (-8), 01/04 (-8)
Total: 12 days with snow/sleet falling.
Polar Low
22 February 2016 18:01:02

And drifting in the strong wind across Bodmin we don't need massive cold uppers from that e ese air would be quite dry also off not the correction axis of the chart to be considered


 



 


Here is the synoptic situation for the GFS 12Z by saturday


frontsat


Note the black lines are troughs, I haven't added them until now because they are really hard in my opinion. Anyway this is my best estimate of the synoptic situation.


An occluded front lies across the SW through parts of Ireland, it is likely that this will give some rather substantial snow in the later case and possibly the former case though snow in cornwall is so rare that I wouldn't bank on it.


Not much use for the rest of us, the whole thing is just so far west.


Originally Posted by: Quantum 

Gooner
22 February 2016 18:21:36


 


It all looks rather marginal unless cold air is already established by that point.


Originally Posted by: doctormog 


Q


If marginal why would J H say heads up for snow ( forecast seen over the weekend), surely the only doubt would be if the ppn got far enough inland as opposed it being cold enough ?


Just a question


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


roger63
22 February 2016 18:21:44


GFS 12z has lots of diving lows with a snow risk remaining and cold at times to.


To far away to put detail on these things though.


Originally Posted by: Charmhills 


Usual jam tomorrow GFS precipitation charts!

Quantum
22 February 2016 18:30:54


 


Q


If marginal why would J H say heads up for snow ( forecast seen over the weekend), surely the only doubt would be if the ppn got far enough inland as opposed it being cold enough ?


Just a question


Originally Posted by: Gooner 


I don't think temperature comes into this at all, rather intensity is the important variable. If its an eratic, broken up, fragmented feature it will probably be rain. If there is any energy in it I can almost guarantee it will be snow. 


2023/2024 Snow days (approx 850hpa temp):
29/11 (-6), 30/11 (-6), 02/12 (-5), 03/12 (-5), 04/12 (-3), 16/01 (-3), 18/01 (-8), 08/02 (-5)

Total: 8 days with snow/sleet falling.

2022/2023 Snow days (approx 850hpa temp):

18/12 (-1), 06/03 (-6), 08/03 (-8), 09/03 (-6), 10/03 (-8), 11/03 (-5), 14/03 (-6)

Total: 7 days with snow/sleet falling.

2021/2022 Snow days (approx 850hpa temp):

26/11 (-5), 27/11 (-7), 28/11 (-6), 02/12 (-6), 06/01 (-5), 07/01 (-6), 06/02 (-5), 19/02 (-5), 24/02 (-7), 30/03 (-7), 31/03 (-8), 01/04 (-8)
Total: 12 days with snow/sleet falling.
Ally Pally Snowman
22 February 2016 18:32:05

-7c/-8c 850s in an easterly won't be far off snow. Models won't pick up ppn until 24/48hrs but I'd be amazed if that was a dry chart.


http://www.wetterzentrale.de/pics/Recm1202.html


 


Bishop's Stortford 85m ASL.
picturesareme
22 February 2016 18:32:46


 


Q


If marginal why would J H say heads up for snow ( forecast seen over the weekend), surely the only doubt would be if the ppn got far enough inland as opposed it being cold enough ?


Just a question


Originally Posted by: Gooner 


gooner it's now Monday eve that weekend forecast is ancient history😋 

JACKO4EVER
22 February 2016 18:35:56


 


Most definitely. I am not intending to supress a bit of optimism, just suggesting that expectations should be kept realistic.
Still, we have another possibly stronger strat warming and maybe SSW level event starting later this week so maybe we should look to mid-March for heavy snow


Originally Posted by: nsrobins 


mid April surely.....2017 😀

Quantum
22 February 2016 18:36:20

I'm backing the pure ECM solution; it looks the least contrived out of all of them (not that I am happy about it).


 


2023/2024 Snow days (approx 850hpa temp):
29/11 (-6), 30/11 (-6), 02/12 (-5), 03/12 (-5), 04/12 (-3), 16/01 (-3), 18/01 (-8), 08/02 (-5)

Total: 8 days with snow/sleet falling.

2022/2023 Snow days (approx 850hpa temp):

18/12 (-1), 06/03 (-6), 08/03 (-8), 09/03 (-6), 10/03 (-8), 11/03 (-5), 14/03 (-6)

Total: 7 days with snow/sleet falling.

2021/2022 Snow days (approx 850hpa temp):

26/11 (-5), 27/11 (-7), 28/11 (-6), 02/12 (-6), 06/01 (-5), 07/01 (-6), 06/02 (-5), 19/02 (-5), 24/02 (-7), 30/03 (-7), 31/03 (-8), 01/04 (-8)
Total: 12 days with snow/sleet falling.
Gooner
22 February 2016 19:04:08


 


gooner it's now Monday eve that weekend forecast is ancient history😋 


Originally Posted by: picturesareme 


I didnt think you would be able to answer that question


Thanks for reminding me of the day of the week though....................quite impressive


FYI The depth of cold forecasted to come across our shores hasnt really changed ( since yesterday ) but the ? over ppn has always been near.


Thanks for the reply though.


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Quantum
22 February 2016 19:06:08

ARPEGE epitomizes everything that could go wrong


frontsatarp


Occluded front decays and leaves debris in its wake; cloudy, cold and drizzly but not snowy


Honestly I'm not seeing any likely significant snow. The conditions are not right for good lake effect conditions (see earlier post), and the fronts all seem to have myalgic encephalopathy.


2023/2024 Snow days (approx 850hpa temp):
29/11 (-6), 30/11 (-6), 02/12 (-5), 03/12 (-5), 04/12 (-3), 16/01 (-3), 18/01 (-8), 08/02 (-5)

Total: 8 days with snow/sleet falling.

2022/2023 Snow days (approx 850hpa temp):

18/12 (-1), 06/03 (-6), 08/03 (-8), 09/03 (-6), 10/03 (-8), 11/03 (-5), 14/03 (-6)

Total: 7 days with snow/sleet falling.

2021/2022 Snow days (approx 850hpa temp):

26/11 (-5), 27/11 (-7), 28/11 (-6), 02/12 (-6), 06/01 (-5), 07/01 (-6), 06/02 (-5), 19/02 (-5), 24/02 (-7), 30/03 (-7), 31/03 (-8), 01/04 (-8)
Total: 12 days with snow/sleet falling.
Gooner
22 February 2016 19:07:57


 


gooner it's now Monday eve that weekend forecast is ancient history😋 


Originally Posted by: picturesareme 


I didnt think you would be able to answer that question


Thanks for reminding me of the day of the week though....................quite impressive


FYI The depth of cold forecasted to come across our shores hasnt really changed ( since yesterday ) but the ? over ppn has always been near.


Thanks for the reply though.


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Hippydave
22 February 2016 19:13:49

Not the most pleasant ens to take us in to spring, if it's early warmth your after.



It does also highlight that without colder air, day time temps will still be in the middle single figures - anything that does fall out of the sky will need to do so early or late if you want wintriness


As you'd expect a somewhat colder picture further North, with slightly colder uppers and less impact from the sun:-



 


Home: Tunbridge Wells
Work: Tonbridge
tallyho_83
22 February 2016 19:17:00


 


It's marginal - the precipitation changes every run as you know: - The last chance for excitement before winter is over!



Originally Posted by: tallyho_83 


 


So realistically - what are the chances of the SW seeing any sleet even this weekend?? Anyone?  


Home Location - Kellands Lane, Okehampton, Devon (200m ASL)
---------------------------------------
Sean Moon
Magical Moon
www.magical-moon.com


White Meadows
22 February 2016 19:18:17
A pretty good setup for south coasters, as good as we've had in the last 18 months anyhow for snow showers.
All depends on where the main low forms along the jet into Europe. Into Iberia and we see colder but bone dry. However as its trending further north over France we could pickup enough moisture to bring some flurries.
Maybe accumulations over the downs! Making for a Good walking scene in crisp bitter air.

nsrobins
22 February 2016 19:23:38

A pretty good setup for south coasters, as good as we've had in the last 18 months anyhow for snow showers.
All depends on where the main low forms along the jet into Europe. Into Iberia and we see colder but bone dry. However as its trending further north over France we could pickup enough moisture to bring some flurries.
Maybe accumulations over the downs! Making for a Good walking scene in crisp bitter air.

Originally Posted by: White Meadows 


Interesting how expectations vary. To me it's just the wrong side of marginal for most of the South and predictions are being managed accordingly. 


The GFS control looks quite chilly though.


Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
Gooner
22 February 2016 19:27:59


 


Interesting how expectations vary. To me it's just the wrong side of marginal for most of the South and predictions are being managed accordingly. 


The GFS control looks quite chilly though.


Originally Posted by: nsrobins 


Through to 384 looking at it


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Gandalf The White
22 February 2016 19:30:28


 


Interesting how expectations vary. To me it's just the wrong side of marginal for most of the South and predictions are being managed accordingly. 


The GFS control looks quite chilly though.


Originally Posted by: nsrobins 


Yes, that's been my view for several days now - cold enough this week when there's precious little in the way of moisture (away from favoured windward coastal areas) and then the wrong side of marginal and/or low pressure too far away come the weekend.


Some nice coldish crisp days and frosty nights will at least make for a seasonal end to winter but that's all I'm expecting.  Beyond that the increasing warmth of the sun and daytime exceeding nighttime for the first time since early autumn.


 


Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


Whether Idle
22 February 2016 19:46:54

Just to add my interpretation of the models - cold and bright for most, the odd wintry shower on prone coasts,and, as the moisture quotient increases, the temperature increases in at least the same proportion, keeping things either damp and raw or cold and bright, and frosty by night.


Dover, 5m asl. Half a mile from the south coast.
scillydave
22 February 2016 20:31:41
I'll second that Islander - March is always the best bet for that rarest of beasts on the Isles of Scilly - snow. The sea temps are around their coldest and as such the air temp doesn't get modified as much as in Dec or Jan. For a wonderful extreme example Google the great west Country blizzard of March 1891- TWO has a great article on it. Snowfall was estimated to be between 1 and 1 and a half meters over Dartmoor. Drifts were over 20ft and the steep sided 500ft deep Taw valley wad reportedly filled with drifted snow.
Currently living at roughly 65m asl North of Cowbridge in the Vale of Glamorgan.

Formerly of, Birdlip, highest village in the Cotswolds and snow heaven in winter; Hawkinge in Kent - roof of the South downs and Isles of Scilly, paradise in the UK.
scillydave
22 February 2016 20:32:24
I'll second that Islander - March is always the best bet for that rarest of beasts on the Isles of Scilly - snow. The sea temps are around their coldest and as such the air temp doesn't get modified as much as in Dec or Jan. For a wonderful extreme example Google the great west Country blizzard of March 1891- TWO has a great article on it. Snowfall was estimated to be between 1 and 1 and a half meters over Dartmoor. Drifts were over 20ft and the steep sided 500ft deep Taw valley wad reportedly filled with drifted snow.
Currently living at roughly 65m asl North of Cowbridge in the Vale of Glamorgan.

Formerly of, Birdlip, highest village in the Cotswolds and snow heaven in winter; Hawkinge in Kent - roof of the South downs and Isles of Scilly, paradise in the UK.
scillydave
22 February 2016 20:38:39
Anybody know why my post has appeared multiple times? Sorry if it's me!
Currently living at roughly 65m asl North of Cowbridge in the Vale of Glamorgan.

Formerly of, Birdlip, highest village in the Cotswolds and snow heaven in winter; Hawkinge in Kent - roof of the South downs and Isles of Scilly, paradise in the UK.
Islander
22 February 2016 20:39:22
Yep 8ft drifts here in March 13, rare maybe, possible, absolutely yes!! ❄️❄️⛄️ I still have such amazing memories of that time! Don't discount it happening again, I certainly won't... 👍
Guernsey

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