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Model output discussion - Post SSW - Will it turn cold?


Paul
Message added by Paul

Please only post model discussion in this thread. 

For more general chat and banter, or moans and ramps loosely around the models, please head to the banter thread:
https://www.netweather.tv/forum/topic/86721-model-moans-ramps-and-banter/

For general weather chat including about the snow/cold chances around the country, please go to the regional threads:
https://www.netweather.tv/forum/forum/142-regional-discussions/

Thank you!

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Posted
  • Location: Stafford 320 FT ASL
  • Location: Stafford 320 FT ASL

Already 1000 viewing the site, members + guests.    The record stands at 3100 11/01/2017

Edited by Fender..
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Posted
  • Location: Longton, Stoke-on-Trent.
  • Location: Longton, Stoke-on-Trent.

This is the GFS' time to shine! Would be typical of it to throw a wobbly, just to show off and have a laugh at us all. Not that the GFS has a mind of it's own. It just seems like it at times :D

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Posted
  • Location: Chandlers Ford, south of Winchester.
  • Location: Chandlers Ford, south of Winchester.

My take on things from the gfs6z: in a northerly wind from an Atlantic source at t54, a northeastly at t84 and a varying degree of strengthening, cold sourced easterly from t96 through to t192 and beyond potentially!!! We’re chasing Armageddon at  days 8-10, the cold from the northern quarter starts in 2 days and it will only get colder! 

Once in...... let the fun begin and I hope it truly is a snow fest!!!! 

90D8EEF7-5F22-4346-B294-050C9CD05591.png

71D3FFC8-E285-409F-95BD-0791FD043EF3.png

2D6B0990-9504-47DD-B893-3456730E44DE.png

D228BAD7-4829-42D1-B529-AB07446A5CD1.png

9E8DA1BF-F8CF-4466-9C85-7EAE15C6F34A.png

9615BB55-E171-4B0C-887E-353945F19E61.png

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Posted
  • Location: Work: Near Glasto Home: near Puriton
  • Weather Preferences: Hot and sunny or cold and snowy. Nothing inbetween.
  • Location: Work: Near Glasto Home: near Puriton

Icon first.. it feels like we are in a cinema waiting for the lights to go down ?..... most anticipated model run yet?! Or maybe just because it’s Sunday afternoon 

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Posted
  • Location: Canmore, AB 4296ft|North Kent 350ft|Killearn 330ft
  • Location: Canmore, AB 4296ft|North Kent 350ft|Killearn 330ft
43 minutes ago, Steve Murr said:

I dont think many understand that this equates to the same as an early season lake effect snowsnow they get off the great lakes in canada when you can get 30-40cm a day in 5cm rates per hour-

Also the Snow ratio for the uk is always sloppy at about 1-6/7 so 1mm rain = 6/7cm of snow-

In this perfect scenario you would be looking at stella dendrites & 1:15 ratios - so huge depths.....

Just saying....

x

 

 

 

 

Having lived through some insane lake effect snows in Canada that’s easily achievable and times 7-8cm an hour weren’t out of the norm.

I also know they can affect very localised areas. Wouldn’t this be the same scenario in the possible set up that you could miss out altogether whilst up the road gets a pasting? Only affecting a small area? 

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Posted
  • Location: North East
  • Weather Preferences: Thunder , Lightning , Snow , Blizzards
  • Location: North East
3 minutes ago, Nick F said:

perhaps to remember for a good while.

eps_ao_00.thumb.png.3046a27dde564900b8f0f3f91bb58b59.pngeps_nao_00.thumb.png.5fb7043fc43653ba58ac3da3adc187fb.png

Crikey ! The NAO going lower than the AO would be something to remember in itself Nick ?

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Posted
  • Location: Wantage, Oxon
  • Weather Preferences: Hot, cold!
  • Location: Wantage, Oxon

How many epic runs can we expect from the 12's?   

I wonder if we enter a bit of a limbo period now, with the basic pattern pretty well set (barring any downgrades or upgrades), but the next questions such as where and when will experience snow not resolvable until later in the week.  So it's a question of continuity of signal, and it's certainly still there in the ICON at T96, maybe pulls the E'ly in a little quicker than the 6z run, not much in it:

icon-0-96.png?18-12

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Posted
  • Location: Waddingham, Lincolnshire. (9m asl)
  • Weather Preferences: Anything newsworthy, so long as it's not in the Daily Express
  • Location: Waddingham, Lincolnshire. (9m asl)
29 minutes ago, Steve Murr said:

IKON @60 has corrected the atlantic shortwave back to the euros - thus ( on this model ) removing one of the last big hurdles ...

Here it is -

C9DF4148-6E51-40FD-94B6-7436EBD61B34.thumb.png.b725a1d3516e8f15cdf8d5df68d86db9.png

( south west of iceland ) - this needs to traverse up the block northwards as opposed to NE into the block..

Check. :good:And as you rightly predicted the ICON is falling into line accordingly. Good alignment of the high at 144.

iconnh-0-144-2.thumb.png.fa5f4d51832f467faa848a39e31c6a2b.png

 

Edited by supernova
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Posted
  • Location: Waddingham, Lincolnshire. (9m asl)
  • Weather Preferences: Anything newsworthy, so long as it's not in the Daily Express
  • Location: Waddingham, Lincolnshire. (9m asl)
10 minutes ago, Raythan said:

Crikey ! The NAO going lower than the AO would be something to remember in itself Nick ?

Seems the GEFS forecast for NAO is on the same page too.

5a899eca84a34_ScreenShot2018-02-18at15_37_45.thumb.png.4754814f3de4e4ca13a58eb83d7a389c.png

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Posted
  • Location: North East
  • Weather Preferences: Thunder , Lightning , Snow , Blizzards
  • Location: North East
2 minutes ago, supernova said:

Seems the GEFS forecast for NAO is on the same page too.

5a899eca84a34_ScreenShot2018-02-18at15_37_45.thumb.png.4754814f3de4e4ca13a58eb83d7a389c.png

This a reflection of the retrogression that the models have been hinting at ?

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Posted
  • Location: Waddingham, Lincolnshire. (9m asl)
  • Weather Preferences: Anything newsworthy, so long as it's not in the Daily Express
  • Location: Waddingham, Lincolnshire. (9m asl)
3 minutes ago, Raythan said:

This a reflection of the retrogression that the models have been hinting at ?

Sadly someone with greater knowledge than my hopeful floundering would need to answer that one for us but I'd certainly like to think so. Would be interested to know the last time the NAO was five standard deviations below.

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Posted
  • Location: uxbridge middlesex(- also Bampton oxfordshire
  • Weather Preferences: blizzard conditions. ice days
  • Location: uxbridge middlesex(- also Bampton oxfordshire

Gfs keen on bringing a partial easterly flow as early as wednesday...

As the change gets underway...

Need to keep the gain going of advecting those lower uppers-west...

Looks very good for that though!!

gfs-1-78.png

Edited by tight isobar
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Posted
  • Location: Rotherhithe, 5.8M ASL
  • Location: Rotherhithe, 5.8M ASL

ICON has Siberian express coming towards us not quite at full speed slower than other models but it’s coming.

F328F694-6B76-4633-9955-D72B23FE3789.thumb.jpeg.01e98c8284a6e4a03aba26e53761db7e.jpeg57E5CE4C-EFEA-4E6C-8A94-FBA1A49A4E19.thumb.png.7c9324bad25cdc2760d288901e7bc0af.png

Edited by Daniel*
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Posted
  • Location: Longwell Green, near Bristol
  • Weather Preferences: Storms, Gales, frost, fog & snow
  • Location: Longwell Green, near Bristol

Continental waft in place at T96 on the 12z UKMO;

UN96-21.thumb.gif.7efed4445df95db7008d5d6f6d031014.gif I

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Posted
  • Location: Rotherhithe, 5.8M ASL
  • Location: Rotherhithe, 5.8M ASL

I bet if you looked through the archives you would never find extensive punishingly cold air like that at this fine of year even in mid winter you would really struggle.

5284F367-4EF7-41E6-942C-D197775B483F.thumb.png.af69410d38cf93249bdcd4a81be0ea3c.png

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Posted
  • Location: North East
  • Weather Preferences: Thunder , Lightning , Snow , Blizzards
  • Location: North East
1 minute ago, ICE COLD said:

Wow you could here a pin drop in here ?. GFS 12z T96 . 

IMG_1597.PNG

Or a snowflake ❄️ 

T96 GFS ?

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Posted
  • Location: Cheddington, Buckinghamshire
  • Weather Preferences: Winter: Cold & Snowy, Summer: Just not hot
  • Location: Cheddington, Buckinghamshire

What even is the ICON? I mentioned it at work to blank faces...

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