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Old January 29th 13, 09:30 AM posted to uk.sci.weather
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Default Heavy snow Fri into Saturday?

Certainly looks cold enough on the northern edge of the deep low running
across the south or Channel. Another one to watch. Doesn't last long though.

Will
--

http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
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Old January 29th 13, 09:40 AM posted to uk.sci.weather
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Default Heavy snow Fri into Saturday?

On Tuesday, January 29, 2013 9:30:21 AM UTC, wrote:
Certainly looks cold enough on the northern edge of the deep low running

across the south or Channel. Another one to watch. Doesn't last long though.




You mean that 'deep' low which is 1006mb on the latest GFS run?
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Old January 29th 13, 09:59 AM posted to uk.sci.weather
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Default Heavy snow Fri into Saturday?

On Tue, 29 Jan 2013 01:40:35 -0800 (PST), willie eckerslike
wrote:
You mean that 'deep' low which is 1006mb on the latest GFS run?


Depth is relative :-)

Deepens from 1003 to 989 in 12 hours (12z Fri to 00z Sat) on the
output I'm looking at. 14 hPa in 12 hours is explosive deepening.
Interesting situation.

--
Freddie
Bayston Hill
Shropshire
102m AMSL
http://www.hosiene.co.uk/weather/
https://twitter.com/#!/BaystonHillWx*for hourly reports*
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Old January 29th 13, 10:03 AM posted to uk.sci.weather
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Default Heavy snow Fri into Saturday?

On Tuesday, 29 January 2013 09:59:19 UTC, Freddie wrote:
On Tue, 29 Jan 2013 01:40:35 -0800 (PST), willie eckerslike

wrote:

You mean that 'deep' low which is 1006mb on the latest GFS run?




Depth is relative :-)



Deepens from 1003 to 989 in 12 hours (12z Fri to 00z Sat) on the

output I'm looking at. 14 hPa in 12 hours is explosive deepening.

Interesting situation.



--

Freddie

Bayston Hill

Shropshire

102m AMSL

http://www.hosiene.co.uk/weather/

https://twitter.com/#!/BaystonHillWxᅵfor hourly reportsᅵ


I think Will may have been talking about a different low. I don't believe that one didn't exist on the 00Z run?
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Old January 29th 13, 10:05 AM posted to uk.sci.weather
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Default Heavy snow Fri into Saturday?

On Tuesday, January 29, 2013 9:59:19 AM UTC, Freddie wrote:

Deepens from 1003 to 989 in 12 hours (12z Fri to 00z Sat) on the
output I'm looking at. 14 hPa in 12 hours is explosive deepening.

Interesting situation.


Piers and Jim will be pleased!


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Old January 29th 13, 10:25 AM posted to uk.sci.weather
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On Tue, 29 Jan 2013 09:59:19 +0000
Freddie wrote:

On Tue, 29 Jan 2013 01:40:35 -0800 (PST), willie eckerslike
wrote:
You mean that 'deep' low which is 1006mb on the latest GFS run?


Depth is relative :-)

Deepens from 1003 to 989 in 12 hours (12z Fri to 00z Sat) on the
output I'm looking at. 14 hPa in 12 hours is explosive deepening.
Interesting situation.


On the 00Z run, it was barely a low and didn't deepen till it got into
the Med. On one of yesterday's runs, it deepened and ran into Biscay,
missing UK. Looks like time to roll a die.

--
Graham P Davis, Bracknell, Berks.
Feeling stressed and frustrated? Try a short session of contemplative
meditation. Or kick a ballboy. (https://twitter.com/GreySkyThinking)
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Old January 29th 13, 10:32 AM posted to uk.sci.weather
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Default Heavy snow Fri into Saturday?


"Graham P Davis" wrote in message
-jade...
On Tue, 29 Jan 2013 09:59:19 +0000
Freddie wrote:

On Tue, 29 Jan 2013 01:40:35 -0800 (PST), willie eckerslike
wrote:
You mean that 'deep' low which is 1006mb on the latest GFS run?


Depth is relative :-)

Deepens from 1003 to 989 in 12 hours (12z Fri to 00z Sat) on the
output I'm looking at. 14 hPa in 12 hours is explosive deepening.
Interesting situation.


On the 00Z run, it was barely a low and didn't deepen till it got into
the Med. On one of yesterday's runs, it deepened and ran into Biscay,
missing UK. Looks like time to roll a die.


00Z ECM explosive deepener along the Channel.
06Z GFS deep low runs across England
00Z UKMO more shallow low moves across Channel
00Z ECM ensembles deepening low moving across southern England.

As I said definitely one to watch for rain, snow and gales. Potential severe
situation.

Will
--
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------

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Old January 29th 13, 10:40 AM posted to uk.sci.weather
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Default Heavy snow Fri into Saturday?

On Tue, 29 Jan 2013 10:25:07 +0000, Graham P Davis
wrote:
Deepens from 1003 to 989 in 12 hours (12z Fri to 00z Sat) on the
output I'm looking at. 14 hPa in 12 hours is explosive deepening.
Interesting situation.


On the 00Z run, it was barely a low and didn't deepen till it got

into
the Med. On one of yesterday's runs, it deepened and ran into

Biscay,
missing UK. Looks like time to roll a die.


I was referring to 12z GM from yesterday (I think it was). Haven't
looked at anything more recent. A quick comparison with yesterday's
12z EC (deeper and further north) suggests that something is going to
happen - and I guess the development is that sensitive to initial
conditions, so I may well take your advice :-)

--
Freddie
Bayston Hill
Shropshire
102m AMSL
http://www.hosiene.co.uk/weather/
https://twitter.com/#!/BaystonHillWx*for hourly reports*
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Old January 29th 13, 10:42 AM posted to uk.sci.weather
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Default Heavy snow Fri into Saturday?

On Tue, 29 Jan 2013 02:03:04 -0800 (PST), "Alan (North West Surrey)"
wrote:
I think Will may have been talking about a different low. I don't

believe t=
hat one didn't exist on the 00Z run?


Yeah you're probably right - lots of different ideas out there at the
moment...

--
Freddie
Bayston Hill
Shropshire
102m AMSL
http://www.hosiene.co.uk/weather/
https://twitter.com/#!/BaystonHillWx*for hourly reports*
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Old January 29th 13, 10:48 AM posted to uk.sci.weather
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Default Heavy snow Fri into Saturday?

willie eckerslike wrote:

On Tuesday, January 29, 2013 9:30:21 AM UTC, wrote:
Certainly looks cold enough on the northern edge of the deep low running

across the south or Channel. Another one to watch. Doesn't last long though.




You mean that 'deep' low which is 1006mb on the latest GFS run?



Or 979mb on the ECMWF operational run ......... you pays your money and you
takes your choice. The joys of numerical weather prediction :-)

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.


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