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-   -   Snow anticipation (https://www.weather-banter.co.uk/uk-sci-weather-uk-weather/187898-snow-anticipation.html)

Eskimo Will January 11th 17 08:25 AM

Snow anticipation
 
Going to get some at home for sure with that polar low running down the
Tamar (T+48 FAX).
But look at the forecast for high Dartmoor

http://www.metoffice...Time=1484352000
-3C, heavy snow and strong winds.

I feel a walk high up coming on on Saturday (just 40 minutes drive to the
really deep snow), now where did I put those pesky snow shoes ..... (and
shovel for the drifts) :-)

Will
--
" Some sects believe that the world was created 5000 years ago. Another sect
believes that it was created in 1910 "
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------


Lawrence Jenkins January 11th 17 09:10 AM

Snow anticipation
 
On Wednesday, 11 January 2017 09:25:43 UTC, wrote:
Going to get some at home for sure with that polar low running down the
Tamar (T+48 FAX).
But look at the forecast for high Dartmoor

http://www.metoffice...Time=1484352000
-3C, heavy snow and strong winds.

I feel a walk high up coming on on Saturday (just 40 minutes drive to the
really deep snow), now where did I put those pesky snow shoes ..... (and
shovel for the drifts) :-)

Will
--
" Some sects believe that the world was created 5000 years ago. Another sect
believes that it was created in 1910 "
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------


Hmm I wonder why snow shoes are 'pesky'. I would have thought they were handy or better still footy, but pesky? That implies if they are so pesky then don't use them or put them on E-Bay

Graham Easterling[_3_] January 11th 17 09:14 AM

Snow anticipation
 
SNIP
Going to get some at home for sure with that polar low running down the
Tamar (T+48 FAX).

Will
--

It's that sort of feature that can give a very strong wind here, often a good deal more than the a glance at the isobars suggests, due to the Lands' End peninsula squeezing the flow and also a funnelling effect down the NNW-SSE orientated valleys (a feature resulting from a tilting of the approx 300' raised beach) For those that know the area Chapel Carn Brea was an island, now surrounded by the 30' plateau. (Well 250' towards the south 350' along the north coast.)

Sorry, drifting back into my geomorphology days.

Graham
Penzance

Alastair January 11th 17 10:18 AM

Snow anticipation
 
On Wednesday, 11 January 2017 10:10:30 UTC, Lawrence Jenkins wrote:
On Wednesday, 11 January 2017 09:25:43 UTC, wrote:
Going to get some at home for sure with that polar low running down the
Tamar (T+48 FAX).
But look at the forecast for high Dartmoor

http://www.metoffice...Time=1484352000
-3C, heavy snow and strong winds.

I feel a walk high up coming on on Saturday (just 40 minutes drive to the
really deep snow), now where did I put those pesky snow shoes ..... (and
shovel for the drifts) :-)

Will
--
" Some sects believe that the world was created 5000 years ago. Another sect
believes that it was created in 1910 "
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------


Hmm I wonder why snow shoes are 'pesky'. I would have thought they were handy or better still footy, but pesky?


It is because they are not handy that they are pesky. They have slowing been burying themselves under other rubbish over the last four or five years. Just another problem caused by global warming :-)

Alastair January 11th 17 10:24 AM

Snow anticipation
 
On Wednesday, 11 January 2017 10:14:52 UTC, Graham Easterling wrote:
SNIP
Going to get some at home for sure with that polar low running down the
Tamar (T+48 FAX).

Will
--

It's that sort of feature that can give a very strong wind here, often a good deal more than the a glance at the isobars suggests, due to the Lands' End peninsula squeezing the flow and also a funnelling effect down the NNW-SSE orientated valleys (a feature resulting from a tilting of the approx 300' raised beach) For those that know the area Chapel Carn Brea was an island, now surrounded by the 30' plateau. (Well 250' towards the south 350' along the north coast.)

Sorry, drifting back into my geomorphology days.

Graham
Penzance


Do you mean a 300' plateau? When would that have been formed, the Eemian?

Graham Easterling[_3_] January 11th 17 01:20 PM

Snow anticipation
 
On Wednesday, January 11, 2017 at 11:24:52 AM UTC, Alastair wrote:
On Wednesday, 11 January 2017 10:14:52 UTC, Graham Easterling wrote:
SNIP
Going to get some at home for sure with that polar low running down the
Tamar (T+48 FAX).

Will
--

It's that sort of feature that can give a very strong wind here, often a good deal more than the a glance at the isobars suggests, due to the Lands' End peninsula squeezing the flow and also a funnelling effect down the NNW-SSE orientated valleys (a feature resulting from a tilting of the approx 300' raised beach) For those that know the area Chapel Carn Brea was an island, now surrounded by the 30' plateau. (Well 250' towards the south 350' along the north coast.)

Sorry, drifting back into my geomorphology days.

Graham
Penzance


Do you mean a 300' plateau? When would that have been formed, the Eemian?


The 300' raised beach (or plateau as it is today) is a dominant feature in the far SW - basically the Land's End peninsula. There are large numbers of other raised beach levels, but none come close to dominating the landscape like the 300' one does.

This is the view from Chapel Carn Brea, 3 miles from Lands End looking across the 300' 'beach' (now a plateau!) http://www.themodernantiquarian.com/...size/88923.jpg It is slightly tilted SSE, which is the direction most of the rivers flow (check an OS map & you'll see)

Along the north coast from Cape Cornwall to St Ives the 'beach is narrower, and has resulted in a farmed area between the cliffs & the moors. Seen rather well here https://www.cornwalls.co.uk/sites/de...om-sperris.jpg.

The view from Cape Cornwall from Sennen probably shows the raised beach best http://c8.alamy.com/comp/B70P1W/senn...all-B70P1W.jpg A consistent 300' cliff where the sea has subsequently eroded back into it.

There's a lot on ages of the various levels if you do as bit of googling. It's a very complex sequence of events.

Graham
Penzance


John Hall[_2_] January 11th 17 08:25 PM

Snow anticipation
 
In message , Eskimo Will
writes
Going to get some at home for sure with that polar low running down the
Tamar (T+48 FAX).
But look at the forecast for high Dartmoor

http://www.metoffice...Time=1484352000
-3C, heavy snow and strong winds.

I feel a walk high up coming on on Saturday (just 40 minutes drive to
the really deep snow), now where did I put those pesky snow shoes .....
(and shovel for the drifts) :-)

Will


Potentially a very interesting day tomorrow in SE England. The
computerised hourly forecast for Cranleigh on the MO website shows rain
setting in around 11am, and becoming heavy during the afternoon, with
temperatures around 5C. In late afternoon the wind veers towards the NW
and the temperature starts to fall, so that we have:

17:00 3C heavy sleet WNW 16mph gusting 32
18:00 0C heavy snow NW 24mph gusting 48
19:00 0C heavy snow NW 20mph gusting 39
20:00 1C slight snow WNW 16 mph gusting 32

After that the weather improves, though by late evening the temperature
is down to -1C, implying very icy conditions whether or not the snow
lies (which if that forecast is totally accurate it would do, of
course).

I realise it's odds against it panning out quite like that, giving the
degree of uncertainty that the (human) forecasters admit to, but even a
close approximation could give a substantial amount of drifting snow,
especially over the Downs and Chilterns.

I'm not very good at interpreting TAFs, but as far as I can make out
those for Heathrow and Gatwick tell a story that's pretty much
consistent with that computerised Cranleigh forecast (I'm pretty much
halfway between the two airports).
--
John Hall
"One can certainly imagine the myriad of uses
for a hand-held iguana maker"
Hobbes (the tiger, not the philosopher!)

Alastair January 11th 17 08:52 PM

Snow anticipation
 
On Wednesday, 11 January 2017 14:20:24 UTC, Graham Easterling wrote:
On Wednesday, January 11, 2017 at 11:24:52 AM UTC, Alastair wrote:
On Wednesday, 11 January 2017 10:14:52 UTC, Graham Easterling wrote:
SNIP
Going to get some at home for sure with that polar low running down the
Tamar (T+48 FAX).

Will
--
It's that sort of feature that can give a very strong wind here, often a good deal more than the a glance at the isobars suggests, due to the Lands' End peninsula squeezing the flow and also a funnelling effect down the NNW-SSE orientated valleys (a feature resulting from a tilting of the approx 300' raised beach) For those that know the area Chapel Carn Brea was an island, now surrounded by the 30' plateau. (Well 250' towards the south 350' along the north coast.)

Sorry, drifting back into my geomorphology days.

Graham
Penzance


Do you mean a 300' plateau? When would that have been formed, the Eemian?


The 300' raised beach (or plateau as it is today) is a dominant feature in the far SW - basically the Land's End peninsula. There are large numbers of other raised beach levels, but none come close to dominating the landscape like the 300' one does.

This is the view from Chapel Carn Brea, 3 miles from Lands End looking across the 300' 'beach' (now a plateau!) http://www.themodernantiquarian.com/...size/88923.jpg It is slightly tilted SSE, which is the direction most of the rivers flow (check an OS map & you'll see)

Along the north coast from Cape Cornwall to St Ives the 'beach is narrower, and has resulted in a farmed area between the cliffs & the moors. Seen rather well here https://www.cornwalls.co.uk/sites/de...om-sperris.jpg.

The view from Cape Cornwall from Sennen probably shows the raised beach best http://c8.alamy.com/comp/B70P1W/senn...all-B70P1W.jpg A consistent 300' cliff where the sea has subsequently eroded back into it.

There's a lot on ages of the various levels if you do as bit of googling. It's a very complex sequence of events.

Graham
Penzance


Thanks Graham.

Weatherlawyer January 11th 17 10:12 PM

Snow anticipation
 
On Wednesday, 11 January 2017 09:25 UTC, wrote:

Going to get some at home for sure with that polar low running down the
Tamar (T+48 FAX).
But look at the forecast for high Dartmoor

http://www.metoffice...Time=1484352000
-3C, heavy snow and strong winds.

I feel a walk high up coming on on Saturday (just 40 minutes drive to the
really deep snow), now where did I put those pesky snow shoes ..... (and
shovel for the drifts) :-)



https://groups.google.com/forum/?hl=...es/5oYs5hZk6Cs

Adam Lea[_2_] January 11th 17 10:13 PM

Snow anticipation
 
On 11/01/2017 21:25, John Hall wrote:
In message , Eskimo Will
writes
Going to get some at home for sure with that polar low running down
the Tamar (T+48 FAX).
But look at the forecast for high Dartmoor

http://www.metoffice...Time=1484352000
-3C, heavy snow and strong winds.

I feel a walk high up coming on on Saturday (just 40 minutes drive to
the really deep snow), now where did I put those pesky snow shoes
..... (and shovel for the drifts) :-)

Will


Potentially a very interesting day tomorrow in SE England. The
computerised hourly forecast for Cranleigh on the MO website shows rain
setting in around 11am, and becoming heavy during the afternoon, with
temperatures around 5C. In late afternoon the wind veers towards the NW
and the temperature starts to fall, so that we have:

17:00 3C heavy sleet WNW 16mph gusting 32
18:00 0C heavy snow NW 24mph gusting 48
19:00 0C heavy snow NW 20mph gusting 39
20:00 1C slight snow WNW 16 mph gusting 32

After that the weather improves, though by late evening the temperature
is down to -1C, implying very icy conditions whether or not the snow
lies (which if that forecast is totally accurate it would do, of course).

I realise it's odds against it panning out quite like that, giving the
degree of uncertainty that the (human) forecasters admit to, but even a
close approximation could give a substantial amount of drifting snow,
especially over the Downs and Chilterns.

I'm not very good at interpreting TAFs, but as far as I can make out
those for Heathrow and Gatwick tell a story that's pretty much
consistent with that computerised Cranleigh forecast (I'm pretty much
halfway between the two airports).


I work up Holmbury hill so it could be interesting trying to get there
on Friday morning if the worst happens.

I'm hoping at the moment that Southern Rail doesn't fall apart tomorrow
and I can get home from London in the evening. I don't fancy trying to
cycle 40 miles home on a cold icy winter night.


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