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Snow And Ice In The Northern Hemisphere 2017/18


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Hjerkinn at just over 1000 metres in central southern Norway this morning -

Though much of the precipitation likely falls as snow at any time of the year, accumulations are probably small. Bearing in mind how western Norway is one of the wettest places in Europe, it is interesting how strong the rain-shadow is, with this reasonably high altitude location being one the driest places in the country, having a desert-like annual precipitation total of only 222mm on average -

https://en.wikipedia.org/wiki/Hjerkinn

Edited by Interitus
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Posted
  • Location: Southend on Sea, London, Jarnac in France
  • Location: Southend on Sea, London, Jarnac in France

Flying over the Alps as I do regularly now, I am happy to report an increased coverage over the higher altitudes this week :-)

20170922_165358.jpg

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Posted
  • Location: Edmonton Alberta(via Chelmsford, Exeter & Calgary)
  • Weather Preferences: Sunshine and 15-25c
  • Location: Edmonton Alberta(via Chelmsford, Exeter & Calgary)
7 hours ago, Turnedoutniceagain said:

That's a good dumping in 2 days

cursnow_asiaeurope.gif

Much of eastern Siberia is below freezing during the day now.

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Posted
  • Location: Warsaw, Poland. Formerly London.
  • Weather Preferences: Four true seasons. Hot summers and cold winters.
  • Location: Warsaw, Poland. Formerly London.
59 minutes ago, cheeky_monkey said:

Much of eastern Siberia is below freezing during the day now.

Getting there. Just had a look at that old favourite Oymyakon. Looks like the maxima will dip below freezing on Sunday 01 October and stay that way. Similiar story for Yakutsk too. The Siberian cold pool buildeth.

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Posted
  • Location: Bude
  • Weather Preferences: Extreme weather...heavy snow and heat waves
  • Location: Bude
On 8/28/2017 at 15:24, CreweCold said:

Unfortunately (and it's nothing but experience talking here), when long range modelling converges on a mild outlook, a mild outlook is what we tend to get. Models tend to do very well modelling zonal driven regimes and there is usually only small margins of error in the output.

If there was large variability between the main long range forecasting tools and the opinions of the pros then you could argue that attempting to forecast the upcoming winter is futile...however there isn't and I think it's a fairly straight forward call this year sadly.

Ha ha ha !! this comment is hilarious, the crystal ball is out early this year I see. A bit of reverse psychology, I like it!!! 

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Posted
  • Location: Warsaw, Poland. Formerly London.
  • Weather Preferences: Four true seasons. Hot summers and cold winters.
  • Location: Warsaw, Poland. Formerly London.
6 hours ago, John Badrick said:

Ha ha ha !! this comment is hilarious, the crystal ball is out early this year I see. A bit of reverse psychology, I like it!!! 

Yes, all part of the fun at Netweather. 

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Posted
  • Location: Port Glasgow, Inverclyde, Scotland. 200m ASL.
  • Weather Preferences: Thundery summers, very snowy winters! Huge Atlantic Storms!
  • Location: Port Glasgow, Inverclyde, Scotland. 200m ASL.

Building up nicely now, with good ice gains.

cursnow_asiaeurope.gif

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Posted
  • Location: Southend on Sea, London, Jarnac in France
  • Location: Southend on Sea, London, Jarnac in France
On 22/09/2017 at 22:35, frozencanals said:

Flying over the Alps as I do regularly now, I am happy to report an increased coverage over the higher altitudes this week :-)

20170922_165358.jpg

All that snow I saw last week in the Alps had disappeared when I flew over them again yesterday....  :-(

FC

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Posted
  • Location: High Wycombe
  • Weather Preferences: Snow and Cold.
  • Location: High Wycombe

Annnnnnnd....... I'm Back! A month later than usual, but strapping myself in for the Great British Annual Snow Hunt!  I say it every year, but this year is the one... Another 2010 on its way!

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Posted
  • Location: Horsham, West sussex, 52m asl
  • Location: Horsham, West sussex, 52m asl

Here we go... the first day of the all-important october snow advance -

cursnow_asiaeurope-1.thumb.gif.a03628c9896bfd772ddb1b283269c893.gif

and 2010 for comparison-

ims2010274_asiaeurope.thumb.gif.a37b37645675a593b75253316b6896e1.gif

remember, regarding the 'controversial' SAI, a 'good head start' means nothing. its all about the rate of growth, not the actual amount. here's how the end of Oct 2010 looked-

ims2010304_asiaeurope.thumb.gif.eef448ba212cd25b6a2de4e14626695c.gif

so that's the kind of scenario we're aiming for....:good:

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Posted
  • Location: Hoyland,barnsley,south yorkshire(134m asl)
  • Weather Preferences: severe storms,snow wind and ice
  • Location: Hoyland,barnsley,south yorkshire(134m asl)

 

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Posted
  • Location: Heckmondwike, West Yorkshire
  • Location: Heckmondwike, West Yorkshire
7 hours ago, Allseasons-si said:

 

Well, it doesn't look good if you trust the models in the next 10 days. I hope the models are correct and then we get a cold winter. We can then put this very fragile and tentative theory to bed! 

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Posted
  • Location: Roznava (Slovakia) formerly Hollywood, Co Wicklow
  • Weather Preferences: continental climate
  • Location: Roznava (Slovakia) formerly Hollywood, Co Wicklow

Guys, where I can find weekly charts of SAI and SCE growth/change, can you post a link please?

 

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Posted
  • Location: Roznava (Slovakia) formerly Hollywood, Co Wicklow
  • Weather Preferences: continental climate
  • Location: Roznava (Slovakia) formerly Hollywood, Co Wicklow

ideally charts that compare against previous years,thanks

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Posted
  • Location: Warsaw, Poland. Formerly London.
  • Weather Preferences: Four true seasons. Hot summers and cold winters.
  • Location: Warsaw, Poland. Formerly London.

Good covering of snow in the high Tatra mountains (border of Poland and Slovakia).

 

zakopane.jpg

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Posted
  • Location: Lytchett Matravers - 301 ft ASL
  • Weather Preferences: Snowy Winters, Torrential Storm Summers
  • Location: Lytchett Matravers - 301 ft ASL
6 hours ago, jules216 said:

Guys, where I can find weekly charts of SAI and SCE growth/change, can you post a link please?

 

I have this bookmarked, http://www.natice.noaa.gov/pub/ims/ims_v3/ims_gif/ARCHIVE/EuAsia/2017/ 

But if you want more detail I would advise following Judah Cohen on Twitter and if you message him he does usually reply. Eurasia Snow advance is something he is very keen on when he goes in-depth on his blogs.

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Posted
  • Location: Edmonton Alberta(via Chelmsford, Exeter & Calgary)
  • Weather Preferences: Sunshine and 15-25c
  • Location: Edmonton Alberta(via Chelmsford, Exeter & Calgary)
6 hours ago, Turnedoutniceagain said:

Ohh I say.....that was one hell of a weekend of snow in Siberia

cursnow_asiaeurope.gif

up to 20-40cm of snow forecast across southern Alberta today..woke to a covering of snow in Edmonton this morning.

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Posted
  • Location: Near King's Lynn 13.68m ASL
  • Weather Preferences: Hoar Frost, Snow, Misty Autumn mornings
  • Location: Near King's Lynn 13.68m ASL
6 hours ago, jules216 said:

ideally charts that compare against previous years,thanks

There's a Northern Hem Snow Cover Extent chart here:

https://climatedataguide.ucar.edu/climate-data/snow-cover-extent-northern-hemisphere-climate-data-record-rutgers

rutgers_sne_nhem.png?itok=Nap5fn4Y

Edit: Just noticed it only goes to 2014. Here's the data so that you can plot your own:

https://climate.rutgers.edu/snowcover/table_area.php?ui_set=1&ui_sort=0

I think the SAI is Cohen's own index and I'm not sure if there is public access anywhere. His most recent blog (18th Sep) is here:

http://www.aer.com/science-research/climate-weather/arctic-oscillation

It's perhaps not worth getting too attached to these things though.

Quote

With a predicted strong negative AO in the coming weeks, snow cover is likely to advance relatively quickly heading into October.  It is very early in the snow season but recent falls have been snowy across Siberia and therefore I do expect another upcoming snowy fall across Siberia.  Though admittedly, recent Siberian snow cover as a predictor of winter temperatures has been mixed.

 

 

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Posted
  • Location: Lytchett Matravers - 301 ft ASL
  • Weather Preferences: Snowy Winters, Torrential Storm Summers
  • Location: Lytchett Matravers - 301 ft ASL
6 hours ago, jules216 said:

ideally charts that compare against previous years,thanks

this is also good. But use Internet explorer not Chrome, doesn't seem to like chrome.

http://satepsanone.nesdis.noaa.gov/northern_hemisphere_multisensor.html

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Posted
  • Location: Roznava (Slovakia) formerly Hollywood, Co Wicklow
  • Weather Preferences: continental climate
  • Location: Roznava (Slovakia) formerly Hollywood, Co Wicklow

Thanks for links, I am looking for specifically something like this

SSx9E2z.png

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