The Weather Outlook

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Boardshark
22 January 2021 08:49:25
Looks like a shift downward again in temps looking at the 0z gefs. Interesting time I dont post here often but have been watching as the current situation is rather different to last year.
449ft Sutton Coldfield, West MIdlands
Gandalf The White
22 January 2021 08:52:23

I guess the Martians ‘could definitely’ land on Hampstead Heath in February too.

Originally Posted by: White Meadows 

LOL. Which model is showing that?


Location: South Cambridgeshire

130 metres ASL

52.0N 0.1E



soperman
22 January 2021 09:04:57

Interesting how the current cold plunge into Europe is totally driven away from the IB high and associated fronts that will sweep through Europe and into Southern Russia over the next 10 days.

The CET in Paris and Berlin will surely be way above average this year.

It very much looks like the hope of any significant cold weather in February is a plunge from the North rather than advecting cold for the east or North East promoted by a Scandi.

After this weekend's little excitement if it develops, we can relax for a week or so and hope for the ENS to strengthen the prospects of a cold outlook for mid Feb through to March

Other than that it's game over for this year - except for Aberdeen of course


Happily living by the sea in Brixham......but sad to leave the snowy Chiltern Hills after 35 years!
Rob K
22 January 2021 09:07:23

 

I mentioned on Twitter recently that IMO GEFS35 at that range is a far better option than CFSv2 regardless of the website / app you are viewing the charts on. On TWO GEFS 35 can be selected here:

https://www.theweatheroutlook.com/twoforecasts/gefs-35-day.aspx

https://www.theweatheroutlook.com/twoforecasts/gefs-europe.aspx

However, that's just my view and I don't have stats to back it up.

Originally Posted by: Brian Gaze 

Thanks for those links. Looks about as average as you can get for London, but looking at the maps the cold anomaly grows the further you go north, which is confirmed by selecting, say, Inverness for the ensemble chart. Quite a strong signal for colder than average February in Scotland.


Yateley, NE Hampshire, 73m asl

"But who wants to be foretold the weather? It is bad enough when it comes, without our having the misery of knowing about it beforehand." — Jerome K. Jerome

doctormog
22 January 2021 09:10:43

 

LOL. Which model is showing that?

Originally Posted by: Gandalf The White 

I believe they have resurrected the old MRF (Martian Raiding Forecast) model. 


Sevendust
22 January 2021 09:41:16

Much speculation as usual but the blocks in the next 10 days have not changed. The persistence of low pressure near Norway has to shift before we can consider an easterly. The ECM op is a good example of the problem. Meanwhile we have to keep looking north for cold spells.

tallyho_83
22 January 2021 10:20:23

 

 

That's actually a remarkable cold signal for a whole month.  Shame it's the CFS which is about as useful as a chocolate teapot. 

Originally Posted by: Ally Pally Snowman 

nO Signal from the CFS means cold - but given the whole of Europe was bathed in above average temperatures for February (red) last month and many p-arts of Europe esp Spain saw record cold and snow as has Italy, Greece and Turkey I would take this as pinch of salt. Nice to see Scandinavia colder which would help colder air from any potential easterly.#

ECM:


Home Location - Vixen Tor Close, Okehampton, Devon (221m ASL)

---------------------------------------

Sean Moon

Magical Moon

www.magical-moon.com

Narnia
22 January 2021 11:01:38

Just need that high pressure slightly further to the north and west over Scandinavia and jackpot!

Arbroath 1320
22 January 2021 11:12:05

Much speculation as usual but the blocks in the next 10 days have not changed. The persistence of low pressure near Norway has to shift before we can consider an easterly. The ECM op is a good example of the problem. Meanwhile we have to keep looking north for cold spells.

Originally Posted by: Sevendust 

Yes and the GFS 6z op is a horror show if you're looking for a cold incursion from the East/NE in early February. LP systems from the Atlantic continue to push NE, generating shortwave after shortwave right up towards Svalbard. This blasts away cold air from Scandi meaning when pressure does rise to our NE at the end of the run, the 850s to our East are relatively high.

Thankfully only one run. Eyes down for the 12zs. 


Kenmore, Highland Perthshire, GGTTH
fairweather
22 January 2021 11:23:27

06z ensemble mean (London) minor downgrade with lowest 850 hPA now -6.5C (was -6.7C) so no ereal change but weekend snow in the S.E looking marginal. It looks the usual where if it pushes far enough North the top edge will see snow and the more Southern regions rain and sleet. Nothing exciting in first week of February other than the cooling trend is still there.


S.Essex, 42m ASL
nsrobins
22 January 2021 12:03:43

06z ensemble mean (London) minor downgrade with lowest 850 hPA now -6.5C (was -6.7C) so no ereal change but weekend snow in the S.E looking marginal. It looks the usual where if it pushes far enough North the top edge will see snow and the more Southern regions rain and sleet. Nothing exciting in first week of February other than the cooling trend is still there.

Originally Posted by: fairweather 

There’s a dedicated thread for this weekend and I think you’ll find that the statement ‘southern regions rain and sleet’ is too definitive on this one. I’m fairly confident the south will see snow at least falling on Sunday.


Neil

Fareham, Hampshire 28m ASL (near estuary)

Stormchaser, Member TORRO

Sevendust
22 January 2021 12:20:54

 

There’s a dedicated thread for this weekend and I think you’ll find that the statement ‘southern regions rain and sleet’ is too definitive on this one. I’m fairly confident the south will see snow at least falling on Sunday.

Originally Posted by: nsrobins 

Agreed

fairweather
22 January 2021 13:15:39

 

There’s a dedicated thread for this weekend and I think you’ll find that the statement ‘southern regions rain and sleet’ is too definitive on this one. I’m fairly confident the south will see snow at least falling on Sunday.

Originally Posted by: nsrobins 

Meant S.E, as in earlier part of comment. i.e Essex, London, Kent, Surrey. Originally front was progged to move into that segment according to fax but more now towards Central South, especially at first. Wouldn't be surprised if it is the usual M4 boundary line. Still nice to see some interest in this at last as I have been mentioning it for a week whilst most seem concerned with February!


S.Essex, 42m ASL
Gandalf The White
22 January 2021 13:41:02

Yet another modest wind reversal at 10hPa being predicted by the latest ECM ensembles, for the end of the month.


Location: South Cambridgeshire

130 metres ASL

52.0N 0.1E



CField
22 January 2021 14:22:50

Seen many a runner low just miss the south coast over the years into N France ,dont see why this one will be any different 


Favourite snowstorm

Famous channel low

Dec 31st 1978

Hastings East Sussex

Foot of level snow severe drifting

Next day max temp -4 degrees Celsius

nsrobins
22 January 2021 15:10:04

Seen many a runner low just miss the south coast over the years into N France ,dont see why this one will be any different 

Originally Posted by: CField 

Apart from the fact most output suggests it won’t.

I’m an advocate for gut instinct and experience, but you have to first concede to available data.


Neil

Fareham, Hampshire 28m ASL (near estuary)

Stormchaser, Member TORRO

Quantum
22 January 2021 15:44:06

The ICON12z is very different.

Quite dramatically so for only 100 hours.


25/26 (850hpa temp) 11 days snow/sleet falling

18/11 (-4) 19/11 (-6) 20/11 (-6) 01/01 (-7) 04/01 (-10) 10/01 (-7) 11/01 (-3) 30/01 (-1) 13/02 (-6) 15/02 (-4) 18/02 (-6)

24/25 10d

18/11 (-6) 19/11 (-6) 23/11 (-2) 22/12 (-5) 04/01 (-5) 05/01 (0)14/02 (0) 15/02 (0)12/03 (-6) 13/03 (-6)

23/24 8d

29/11 (-6) 30/11 (-6) 02/12 (-5) 03/12 (-5) 04/12 (-3) 16/01 (-3) 18/01 (-8)08/02 (-5)

22/23 7d

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

21/22 12d

DPower
22 January 2021 15:45:49

Much more amplified run from the Icon this afternoon. Very cold air knocking on the door at t180. With the whole country under n/e air flow I would imagine not long after.

https://images.meteociel.fr/im/6504/iconnh-0-180_ueu0.png

Quantum
22 January 2021 15:47:00

This is as far north as the cold air gets on the ICON12z

And we know these sliders tend to be further north than they actually end up.

I should be clear this is attempt #2. Attempt #1 on Tuesday gets nowhere.

 


25/26 (850hpa temp) 11 days snow/sleet falling

18/11 (-4) 19/11 (-6) 20/11 (-6) 01/01 (-7) 04/01 (-10) 10/01 (-7) 11/01 (-3) 30/01 (-1) 13/02 (-6) 15/02 (-4) 18/02 (-6)

24/25 10d

18/11 (-6) 19/11 (-6) 23/11 (-2) 22/12 (-5) 04/01 (-5) 05/01 (0)14/02 (0) 15/02 (0)12/03 (-6) 13/03 (-6)

23/24 8d

29/11 (-6) 30/11 (-6) 02/12 (-5) 03/12 (-5) 04/12 (-3) 16/01 (-3) 18/01 (-8)08/02 (-5)

22/23 7d

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

21/22 12d

Quantum
22 January 2021 15:49:56

Much more of a traditional snow slider event on Tuesday. These things are pretty common and happen pretty much every year, sometimes more than once and the areas hit hardest always tend to be the same. North Midlands, South Yorkshire always very favoured. Birmingham tends to be where the rain/snow boundary is (note the models tend to push these too far north) and the northern extent of the snow is usually around leeds. Places like Sheffield and nottingham get plastered.

 


25/26 (850hpa temp) 11 days snow/sleet falling

18/11 (-4) 19/11 (-6) 20/11 (-6) 01/01 (-7) 04/01 (-10) 10/01 (-7) 11/01 (-3) 30/01 (-1) 13/02 (-6) 15/02 (-4) 18/02 (-6)

24/25 10d

18/11 (-6) 19/11 (-6) 23/11 (-2) 22/12 (-5) 04/01 (-5) 05/01 (0)14/02 (0) 15/02 (0)12/03 (-6) 13/03 (-6)

23/24 8d

29/11 (-6) 30/11 (-6) 02/12 (-5) 03/12 (-5) 04/12 (-3) 16/01 (-3) 18/01 (-8)08/02 (-5)

22/23 7d

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

21/22 12d

SJV
22 January 2021 15:52:12

Much more of a traditional snow slider event on Tuesday. These things are pretty common and happen pretty much every year, sometimes more than once and the areas hit hardest always tend to be the same. North Midlands, South Yorkshire always very favoured. Birmingham tends to be where the rain/snow boundary is (note the models tend to push these too far north) and the northern extent of the snow is usually around leeds. Places like Sheffield and nottingham get plastered.

 

Originally Posted by: Quantum 

Fingers crossed then 

Quantum
22 January 2021 15:56:54

 

Fingers crossed then 

Originally Posted by: SJV 

Think you are in a better position than I am. For me its perfect right now, but inevitably it will trend south. I'd expect to be right on the northern edge with drizzle/snizzle/nothing

 


25/26 (850hpa temp) 11 days snow/sleet falling

18/11 (-4) 19/11 (-6) 20/11 (-6) 01/01 (-7) 04/01 (-10) 10/01 (-7) 11/01 (-3) 30/01 (-1) 13/02 (-6) 15/02 (-4) 18/02 (-6)

24/25 10d

18/11 (-6) 19/11 (-6) 23/11 (-2) 22/12 (-5) 04/01 (-5) 05/01 (0)14/02 (0) 15/02 (0)12/03 (-6) 13/03 (-6)

23/24 8d

29/11 (-6) 30/11 (-6) 02/12 (-5) 03/12 (-5) 04/12 (-3) 16/01 (-3) 18/01 (-8)08/02 (-5)

22/23 7d

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

21/22 12d

warrenb
22 January 2021 16:01:36
I feel a change is afoot.
Quantum
22 January 2021 16:01:41

ARPEGE12z also an upgrade on the 6z.

Energy pushing away to the SE.

 


25/26 (850hpa temp) 11 days snow/sleet falling

18/11 (-4) 19/11 (-6) 20/11 (-6) 01/01 (-7) 04/01 (-10) 10/01 (-7) 11/01 (-3) 30/01 (-1) 13/02 (-6) 15/02 (-4) 18/02 (-6)

24/25 10d

18/11 (-6) 19/11 (-6) 23/11 (-2) 22/12 (-5) 04/01 (-5) 05/01 (0)14/02 (0) 15/02 (0)12/03 (-6) 13/03 (-6)

23/24 8d

29/11 (-6) 30/11 (-6) 02/12 (-5) 03/12 (-5) 04/12 (-3) 16/01 (-3) 18/01 (-8)08/02 (-5)

22/23 7d

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

21/22 12d

Quantum
22 January 2021 16:02:45

NAVGEM6z called it


25/26 (850hpa temp) 11 days snow/sleet falling

18/11 (-4) 19/11 (-6) 20/11 (-6) 01/01 (-7) 04/01 (-10) 10/01 (-7) 11/01 (-3) 30/01 (-1) 13/02 (-6) 15/02 (-4) 18/02 (-6)

24/25 10d

18/11 (-6) 19/11 (-6) 23/11 (-2) 22/12 (-5) 04/01 (-5) 05/01 (0)14/02 (0) 15/02 (0)12/03 (-6) 13/03 (-6)

23/24 8d

29/11 (-6) 30/11 (-6) 02/12 (-5) 03/12 (-5) 04/12 (-3) 16/01 (-3) 18/01 (-8)08/02 (-5)

22/23 7d

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

21/22 12d

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