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Old November 18th 11, 09:05 AM posted to uk.sci.weather
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Posts: 3,280
Default The Models will all change their long term ideas in the next 3 to 4 days.

Neo, it is always difficult to second-guess the models.
However, what the Met Office has been saying in the professional briefings I
have attended each morning is that the block will be very stubborn with
multiple trough disruptions helping to maintain it. This keeps most rain in
the west but means detail is very difficult even at a few days as models
struggle with trough disruptions. Len Wood mentioned in another thread that
the Rossby wavelengths are such as to maintain persistence and he has been
right so far. But, another thing we have been saying is that the block
*will* slowly erode with some form of zonality establishing itself by the
end of the month, coinciding with your thoughts to an extent. So by December
we could well be in a colder NW'ly scenario, how cold is yet to be seen, but
cold SSTs in western Atlantic would suggest to me that a mid-Atlantic ridge
could build plunging us rapidly into a bitter northerly, note Ny Alesund has
been very cold of late. This would also retrogress the Rossby pattern and
put us into the more active cold side. Until the high topples and we settle
down into a mild zonal winter :-) I didn't say that, I'm still going for a
cold and snowy December. Weather and this newsgroup should be fun, enjoy!

Will
--


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Old November 18th 11, 09:15 AM posted to uk.sci.weather
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Posts: 6,777
Default The Models will all change their long term ideas in the next 3 to4 days.

On Nov 18, 9:05*am, "Eskimo Will" wrote:
Neo, it is always difficult to second-guess the models.
However, what the Met Office has been saying in the professional briefings I
have attended each morning is that the block will be very stubborn with
multiple trough disruptions helping to maintain it. This keeps most rain in
the west but means detail is very difficult even at a few days as models
struggle with trough disruptions. Len Wood mentioned in another thread that
the Rossby wavelengths are such as to maintain persistence and he has been
right so far. But, another thing we have been saying is that the block
*will* slowly erode with some form of zonality establishing itself by the
end of the month, coinciding with your thoughts to an extent. So by December
we could well be in a colder NW'ly scenario, how cold is yet to be seen, but
cold SSTs in western Atlantic would suggest to me that a mid-Atlantic ridge
could build plunging us rapidly into a bitter northerly, note Ny Alesund has
been very cold of late. This would also retrogress the Rossby pattern and
put us into the more active cold side. Until the high topples and we settle
down into a mild zonal winter :-) I didn't say that, I'm still going for a
cold and snowy December. Weather and this newsgroup should be fun, enjoy!


There will be a couple of 6 to 6.5 mag quakes before late sunday
morning, one at least judging by the compression on the Canadain
charts:
http://www.weatheroffice.gc.ca/data/...is/941_100.gif

The organisation will clear up on the runs with that.
Personally I think the timing is for the birds, so pay attention all
you nature lovers. And non-monoculturists.

I wonder how digital TV is going to affect avian preponderances?
I suppose they will have to put new deposits on higher perches.
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Old November 18th 11, 09:31 AM posted to uk.sci.weather
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Posts: 6,777
Default The Models will all change their long term ideas in the next 3 to4 days.

On Nov 18, 9:15*am, Weatherlawyer wrote:

There will be a couple of 6 to 6.5 mag quakes before late Sunday
morning, one at least judging by the compression on the Canadian
charts:
http://www.weatheroffice.gc.ca/data/...is/941_100.gif

The organisation of the runs will clear up with that.


Forgot to mention for my fans, some of these charts are stored he
http://my.opera.com/Weatherlawyer/bl...omment75029022

Yawl take care now you err.

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Old November 18th 11, 10:34 AM posted to uk.sci.weather
Neo Neo is offline
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Posts: 31
Default The Models will all change their long term ideas in the next 3 to4 days.

On Nov 18, 9:05*am, "Eskimo Will" wrote:
Neo, it is always difficult to second-guess the models.
However, what the Met Office has been saying in the professional briefings I
have attended each morning is that the block will be very stubborn with
multiple trough disruptions helping to maintain it. This keeps most rain in
the west but means detail is very difficult even at a few days as models
struggle with trough disruptions. Len Wood mentioned in another thread that
the Rossby wavelengths are such as to maintain persistence and he has been
right so far. But, another thing we have been saying is that the block
*will* slowly erode with some form of zonality establishing itself by the
end of the month, coinciding with your thoughts to an extent. So by December
we could well be in a colder NW'ly scenario, how cold is yet to be seen, but
cold SSTs in western Atlantic would suggest to me that a mid-Atlantic ridge
could build plunging us rapidly into a bitter northerly, note Ny Alesund has
been very cold of late. This would also retrogress the Rossby pattern and
put us into the more active cold side. Until the high topples and we settle
down into a mild zonal winter :-) I didn't say that, I'm still going for a
cold and snowy December. Weather and this newsgroup should be fun, enjoy!

Will
--


Hi Will,
Thank you for your responses. (And everyone else too).
I am familiar with the Met Office thoughts on the next weeks, however,
my forecast is not for the acrual weather, but just for the changing
path of the models bias and outcomes.
Yes, I am still going for the models pointing ever more to a colder
scenario during the end Nov/early Dec, so in weather forecasting
terms, the 4 to 10 day outlook will be progressively cooler as from
that time.
Forecasting can only be done reliably from 12 to 48 hours in my
experience. Seat of pants forecasting is what we call it in the trade.
Sometimes it can be more difficult to get the next 4 hours right, let
alone anything weeks ahead.
Far better for forecasters to add value to the model itself in many
"long term" cases, as this time of year always brings out the Crystal
ball hogging "gypsy" forecasters, many of whom have a biased
"Dickensian" view of how winter should pan out.

Yes, Dawlish is correct, it is mild now, and looks mild for some days
yet, but that is not what I am about. I am predicting a swing in
"model outcomes" to a more cool outlook, then becoming decidedly cold.
Various outlying "tubes" of most models are now becoming less inclined
to mild conditions for us in the UK, and as you point out, some signs
of the rossby changes you mention are starting to take effect in a few
places. I may not be correct, in fact I know I'm not 100 correct
already, but I do try to do the best I can with the data and vast
experience that I have.
I do have the best advanced training in Meteorology under my belt,
various Model interpretation, computer and mathematical modelling, a
couple of good degrees in Maths and Physics with Chemistry, one in a
Technical design BA subject, and over 2 decades experience in the
right area. Added to that I hold a good position in my career, and am
respected in my field.
I have numerous big hobbies too including Astronomy and Geology.
Heck, I might even try and become a forecaster, rather than a guesser.

I may continue in here, I may not, but anyone who knows how it all
works will say it is a hard and sometimes dangerous thing to forecast
weeks in advance. Maybe it is more satisfying to me to see what I
think the models will turn their attention too instead. Forecasting is
one thing, borrowing someone else's forecast is quite another. I never
do the latter.

Neo

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Old November 18th 11, 10:48 AM posted to uk.sci.weather
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First recorded activity by Weather-Banter: Oct 2011
Posts: 3,280
Default The Models will all change their long term ideas in the next 3 to 4 days.

"Neo" wrote in message
...
On Nov 18, 9:05 am, "Eskimo Will" wrote:
Neo, it is always difficult to second-guess the models.
However, what the Met Office has been saying in the professional briefings
I
have attended each morning is that the block will be very stubborn with
multiple trough disruptions helping to maintain it. This keeps most rain
in
the west but means detail is very difficult even at a few days as models
struggle with trough disruptions. Len Wood mentioned in another thread
that
the Rossby wavelengths are such as to maintain persistence and he has been
right so far. But, another thing we have been saying is that the block
*will* slowly erode with some form of zonality establishing itself by the
end of the month, coinciding with your thoughts to an extent. So by
December
we could well be in a colder NW'ly scenario, how cold is yet to be seen,
but
cold SSTs in western Atlantic would suggest to me that a mid-Atlantic
ridge
could build plunging us rapidly into a bitter northerly, note Ny Alesund
has
been very cold of late. This would also retrogress the Rossby pattern and
put us into the more active cold side. Until the high topples and we
settle
down into a mild zonal winter :-) I didn't say that, I'm still going for a
cold and snowy December. Weather and this newsgroup should be fun, enjoy!

Will
--


Hi Will,
Thank you for your responses. (And everyone else too).
I am familiar with the Met Office thoughts on the next weeks, however,
my forecast is not for the acrual weather, but just for the changing
path of the models bias and outcomes.
Yes, I am still going for the models pointing ever more to a colder
scenario during the end Nov/early Dec, so in weather forecasting
terms, the 4 to 10 day outlook will be progressively cooler as from
that time.
Forecasting can only be done reliably from 12 to 48 hours in my
experience. Seat of pants forecasting is what we call it in the trade.
Sometimes it can be more difficult to get the next 4 hours right, let
alone anything weeks ahead.
Far better for forecasters to add value to the model itself in many
"long term" cases, as this time of year always brings out the Crystal
ball hogging "gypsy" forecasters, many of whom have a biased
"Dickensian" view of how winter should pan out.

Yes, Dawlish is correct, it is mild now, and looks mild for some days
yet, but that is not what I am about. I am predicting a swing in
"model outcomes" to a more cool outlook, then becoming decidedly cold.
Various outlying "tubes" of most models are now becoming less inclined
to mild conditions for us in the UK, and as you point out, some signs
of the rossby changes you mention are starting to take effect in a few
places. I may not be correct, in fact I know I'm not 100 correct
already, but I do try to do the best I can with the data and vast
experience that I have.
I do have the best advanced training in Meteorology under my belt,
various Model interpretation, computer and mathematical modelling, a
couple of good degrees in Maths and Physics with Chemistry, one in a
Technical design BA subject, and over 2 decades experience in the
right area. Added to that I hold a good position in my career, and am
respected in my field.
I have numerous big hobbies too including Astronomy and Geology.
Heck, I might even try and become a forecaster, rather than a guesser.

I may continue in here, I may not, but anyone who knows how it all
works will say it is a hard and sometimes dangerous thing to forecast
weeks in advance. Maybe it is more satisfying to me to see what I
think the models will turn their attention too instead. Forecasting is
one thing, borrowing someone else's forecast is quite another. I never
do the latter.

Neo


=================

OK cheers Neo. We in the Met Office rely on ensembles a lot and they have
been consistent in flagging a colder NW ly or even northerly as we go into
Dec. That is a change you too expect I think. A lot of data are not
available publicly though (e.g. Met Office model ensembles). The MetO also
run 4km and 1.5km resolution models to get detailed evolutions over the UK,
particulaly for extreme rainfall events (again not publicly available). You
don't say where you got your "advanced training" from? I used to teach
meteorology and forecasting, were you one of my students? :-)

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



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Old November 18th 11, 11:56 AM posted to uk.sci.weather
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First recorded activity by Weather-Banter: Oct 2009
Posts: 1,730
Default The Models will all change their long term ideas in the next 3 to4 days.

On Nov 18, 10:48*am, "Eskimo Will" wrote:
"Neo" wrote in message

...
On Nov 18, 9:05 am, "Eskimo Will" wrote:









Neo, it is always difficult to second-guess the models.
However, what the Met Office has been saying in the professional briefings
I
have attended each morning is that the block will be very stubborn with
multiple trough disruptions helping to maintain it. This keeps most rain
in
the west but means detail is very difficult even at a few days as models
struggle with trough disruptions. Len Wood mentioned in another thread
that
the Rossby wavelengths are such as to maintain persistence and he has been
right so far. But, another thing we have been saying is that the block
*will* slowly erode with some form of zonality establishing itself by the
end of the month, coinciding with your thoughts to an extent. So by
December
we could well be in a colder NW'ly scenario, how cold is yet to be seen,
but
cold SSTs in western Atlantic would suggest to me that a mid-Atlantic
ridge
could build plunging us rapidly into a bitter northerly, note Ny Alesund
has
been very cold of late. This would also retrogress the Rossby pattern and
put us into the more active cold side. Until the high topples and we
settle
down into a mild zonal winter :-) I didn't say that, I'm still going for a
cold and snowy December. Weather and this newsgroup should be fun, enjoy!


Will
--


Hi Will,Thankyouforyour responses. (And everyone else too).
I am familiar with the Met Office thoughts on the next weeks, however,my forecast is not for the acrual weather, but just for the changingpath of the models bias and outcomes.
Yes, I am still going for the models pointing ever more to a colderscenario during the end Nov/early Dec, so in weather forecasting
terms, the 4 to 10 day outlook will be progressively cooler as fromthattime.
Forecasting can only be done reliably from 12 to 48 hours in myexperience.. Seatof pants forecasting is whatwe call it in the trade.
Sometimes it can be more difficult to get the next 4 hours right, let
alone anything weeks ahead.
Far better for forecasters to add value to the model itself in many
"long term" cases, as this time of year always brings out the Crystalball hogging "gypsy" forecasters, many of whomhavea biased
"Dickensian" view of how winter should pan out.

Yes, Dawlish is correct, it is mild now, and looks mild for some daysyet, but thatis not whatI am about. I am predicting a swing in
"model outcomes" to a more cool outlook, then becoming decidedly cold.
Various outlying "tubes" of most models are now becoming less inclinedto mild conditions for us in the UK, and asyoupoint out, some signsof the rossby changesyoumention are starting to take effect in a few
places. I may not be correct, in fact I know I'm not 100 correctalready, but I do try to do the best I can with the data and vastexperience thatIhave.I dohavethe best advanced training in Meteorology under my belt,various Model interpretation, computer and mathematical modelling, acouple of good degrees in Maths and Physics with Chemistry, one in a
Technical design BA subject, and over 2 decades experience in theright area. Added to thatI hold a good position in my career, and am
respected in my field.Ihavenumerous big hobbies too including Astronomy and Geology.Heck, I might even try and become a forecaster, rather than a guesser.

I may continue in here, I may not, but anyone who knows how it all
works will say it is a hard and sometimes dangerous thing to forecastweeks in advance. Maybe it is more satisfying to me to see whatIthink the models will turn theirattention too instead. Forecasting is
one thing, borrowing someone else's forecast is quite another. I neverdo the latter.

Neo

=================

OK cheers Neo. We in the Met Office rely on ensembles a lot and theyhave
been consistent in flagging a colder NW ly or even northerly as we go intoDec. Thatis a changeyoutoo expect I think. A lot of data are not
available publicly though (e.g. Met Office model ensembles). The MetO also
run 4km and 1.5km resolution models to get detailed evolutions over the UK,particulaly for extreme rainfall events (again not publicly available).Youdon't say whereyougotyour "advanced training" from? I used to teachmeteorology and forecasting, wereyouone of my students? :-)

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


Or were you one of my students Neo?
:-)
Where did you study for your degrees?
No need to answer if you don't want to.
A lot of people on this ng want to remain as anonymous as possible.
That's OK, as long as we all try to remain courteous to each other.


Len Wood
Wembury, SW Devon, 83 m asl
------------------------------------------------------
  #7   Report Post  
Old November 18th 11, 12:11 PM posted to uk.sci.weather
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First recorded activity by Weather-Banter: Mar 2008
Posts: 10,601
Default The Models will all change their long term ideas in the next 3 to4 days.

On Nov 18, 10:34*am, Neo wrote:
On Nov 18, 9:05*am, "Eskimo Will" wrote:





Neo, it is always difficult to second-guess the models.
However, what the Met Office has been saying in the professional briefings I
have attended each morning is that the block will be very stubborn with
multiple trough disruptions helping to maintain it. This keeps most rain in
the west but means detail is very difficult even at a few days as models
struggle with trough disruptions. Len Wood mentioned in another thread that
the Rossby wavelengths are such as to maintain persistence and he has been
right so far. But, another thing we have been saying is that the block
*will* slowly erode with some form of zonality establishing itself by the
end of the month, coinciding with your thoughts to an extent. So by December
we could well be in a colder NW'ly scenario, how cold is yet to be seen, but
cold SSTs in western Atlantic would suggest to me that a mid-Atlantic ridge
could build plunging us rapidly into a bitter northerly, note Ny Alesund has
been very cold of late. This would also retrogress the Rossby pattern and
put us into the more active cold side. Until the high topples and we settle
down into a mild zonal winter :-) I didn't say that, I'm still going for a
cold and snowy December. Weather and this newsgroup should be fun, enjoy!


Will
--


Hi Will,
Thank you for your responses. (And everyone else too).
I am familiar with the Met Office thoughts on the next weeks, however,
my forecast is not for the acrual weather, but just for the changing
path of the models bias and outcomes.
Yes, I am still going for the models pointing ever more to a colder
scenario during the end Nov/early Dec, so in weather forecasting
terms, the 4 to 10 day outlook will be progressively cooler as from
that time.
Forecasting can only be done reliably from 12 to 48 hours in my
experience. Seat of pants forecasting is what we call it in the trade.
Sometimes it can be more difficult to get the next 4 hours right, let
alone anything weeks ahead.
Far better for forecasters to add value to the model itself in many
"long term" cases, as this time of year always brings out the Crystal
ball hogging "gypsy" forecasters, many of whom have a biased
"Dickensian" view of how winter should pan out.

Yes, Dawlish is correct, it is mild now, and looks mild for some days
yet, but that is not what I am about. I am predicting a swing in
"model outcomes" to a more cool outlook, then becoming decidedly cold.
Various outlying "tubes" of most models are now becoming less inclined
to mild conditions for us in the UK, and as you point out, some signs
of the rossby changes you mention are starting to take effect in a few
places. I may not be correct, in fact I know I'm not 100 correct
already, but I do try to do the best I can with the data and vast
experience that I have.
I do have the best advanced training in Meteorology under my belt,
various Model interpretation, computer and mathematical modelling, a
couple of good degrees in Maths and Physics with Chemistry, one in a
Technical design BA subject, and over 2 decades experience in the
right area. Added to that I hold a good position in my career, and am
respected in my field.
I have numerous big hobbies too including Astronomy and Geology.
Heck, I might even try and become a forecaster, rather than a guesser.

I may continue in here, I may not, but anyone who knows how it all
works will say it is a hard and sometimes dangerous thing to forecast
weeks in advance. Maybe it is more satisfying to me to see what I
think the models will turn their attention too instead. Forecasting is
one thing, borrowing someone else's forecast is quite another. I never
do the latter.

Neo- Hide quoted text -

- Show quoted text -


What a nice post. Look forward to more. In my experience, forecasting
can be done with 80% accuracy as to the general picture, on occasions,
at 10 days. At present, I feel this is one of those times. they don't
occur that often. Most of the time, forecasting at that distance is
inaccurate and the MetO's 6-15 day precis is probably written by the
tea boy in his spare time, the use it is to anyone past 10 days. *))
Seasonal forecasting is inaccurate; illustrated well by the MetO
pulling out of public forecasting at that distance and no-one has
believably demonstrated better accuracy than the MetO.

PS I'd love to know what the "best advanced training in Meteorology"
is and what the "vast experience" is that you have! I'm sure some
others would too.Would you like to share that?

Paul
  #8   Report Post  
Old November 18th 11, 12:20 PM posted to uk.sci.weather
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First recorded activity by Weather-Banter: Dec 2009
Posts: 5,538
Default The Models will all change their long term ideas in the next 3 to 4 days.

the MetO's 6-15 day precis is probably written by the
tea boy in his spare time, the use it is to anyone past 10 days. *))

It gives an indication of the thinking at the time, based on the data
available at the time. It's a bit insulting to say "probably written by the
tea boy". Better to stick with "not much use past 10 days".

illustrated well by the MetO
pulling out of public forecasting at that distance.

Not true. MetO still forecast at that distance, and it's available to all.

--
Freddie
Bayston Hill
Shropshire
102m AMSL
http://www.hosiene.co.uk/weather/cumulus/


  #9   Report Post  
Old November 18th 11, 12:32 PM posted to uk.sci.weather
Neo Neo is offline
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First recorded activity by Weather-Banter: Jul 2009
Posts: 31
Default The Models will all change their long term ideas in the next 3 to4 days.

On Nov 18, 11:56*am, Len Wood wrote:
On Nov 18, 10:48*am, "Eskimo Will" wrote:



"Neo" wrote in message


....
On Nov 18, 9:05 am, "Eskimo Will" wrote:


Neo, it is always difficult to second-guess the models.
However, what the Met Office has been saying in the professional briefings
I
have attended each morning is that the block will be very stubborn with
multiple trough disruptions helping to maintain it. This keeps most rain
in
the west but means detail is very difficult even at a few days as models
struggle with trough disruptions. Len Wood mentioned in another thread
that
the Rossby wavelengths are such as to maintain persistence and he has been
right so far. But, another thing we have been saying is that the block
*will* slowly erode with some form of zonality establishing itself by the
end of the month, coinciding with your thoughts to an extent. So by
December
we could well be in a colder NW'ly scenario, how cold is yet to be seen,
but
cold SSTs in western Atlantic would suggest to me that a mid-Atlantic
ridge
could build plunging us rapidly into a bitter northerly, note Ny Alesund
has
been very cold of late. This would also retrogress the Rossby pattern and
put us into the more active cold side. Until the high topples and we
settle
down into a mild zonal winter :-) I didn't say that, I'm still going for a
cold and snowy December. Weather and this newsgroup should be fun, enjoy!


Will
--


Hi Will,Thankyouforyour responses. (And everyone else too).
I am familiar with the Met Office thoughts on the next weeks, however,my forecast is not for the acrual weather, but just for the changingpath of the models bias and outcomes.
Yes, I am still going for the models pointing ever more to a colderscenario during the end Nov/early Dec, so in weather forecasting
terms, the 4 to 10 day outlook will be progressively cooler as fromthattime.
Forecasting can only be done reliably from 12 to 48 hours in myexperience. Seatof pants forecasting is whatwe call it in the trade.
Sometimes it can be more difficult to get the next 4 hours right, let
alone anything weeks ahead.
Far better for forecasters to add value to the model itself in many
"long term" cases, as this time of year always brings out the Crystalball hogging "gypsy" forecasters, many of whomhavea biased
"Dickensian" view of how winter should pan out.


Yes, Dawlish is correct, it is mild now, and looks mild for some daysyet, but thatis not whatI am about. I am predicting a swing in
"model outcomes" to a more cool outlook, then becoming decidedly cold.
Various outlying "tubes" of most models are now becoming less inclinedto mild conditions for us in the UK, and asyoupoint out, some signsof the rossby changesyoumention are starting to take effect in a few
places. I may not be correct, in fact I know I'm not 100 correctalready, but I do try to do the best I can with the data and vastexperience thatIhave.I dohavethe best advanced training in Meteorology under my belt,various Model interpretation, computer and mathematical modelling, acouple of good degrees in Maths and Physics with Chemistry, one in a
Technical design BA subject, and over 2 decades experience in theright area. Added to thatI hold a good position in my career, and am
respected in my field.Ihavenumerous big hobbies too including Astronomy and Geology.Heck, I might even try and become a forecaster, rather than a guesser.


I may continue in here, I may not, but anyone who knows how it all
works will say it is a hard and sometimes dangerous thing to forecastweeks in advance. Maybe it is more satisfying to me to see whatIthink the models will turn theirattention too instead. Forecasting is
one thing, borrowing someone else's forecast is quite another. I neverdo the latter.


Neo


=================


OK cheers Neo. We in the Met Office rely on ensembles a lot and theyhave
been consistent in flagging a colder NW ly or even northerly as we go intoDec. Thatis a changeyoutoo expect I think. A lot of data are not
available publicly though (e.g. Met Office model ensembles). The MetO also
run 4km and 1.5km resolution models to get detailed evolutions over the UK,particulaly for extreme rainfall events (again not publicly available).Youdon't say whereyougotyour "advanced training" from? I used to teachmeteorology and forecasting, wereyouone of my students? :-)


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


Or were you one of my students Neo?
:-)
Where did you study for your degrees?
No need to answer if you don't want to.
A lot of people on this ng want to remain as anonymous as possible.
That's OK, as long as we all try to remain courteous to each other.

Len Wood
Wembury, SW Devon, 83 m asl
------------------------------------------------------


My place of work and identity will remain anonymous due to my
employment contract. Also, I was sponsored by my employer so many
years ago to study, and I morally owe it to them.
Will, I am familiar with the Met Office ensembles, 1.5 (UKV) and 4KM
models, just as much as the coarse Global output. All very good tools,
but at the moment, no more than that...tools....the important boundary
layer will always confuse and confound even the best high resolution
array, with its topography, geology, agriculture, and localised
variance in water vapour etc....especially in areas like the UK with
it's almost unique set of airmass influences and off continent
Maritime position.
Moisture handling of the model routines is very complex, more so near
to the ground or sea surfaces.
The WAFC forecasts are all very good regarding quality and
reliability, more especially above FL050-100, the models do a very
good job there in the 12-36 hour period on the whole.
I prefer to concentrate on how the models fluctuate in the longer term
and see how real events can flip the decisions that they make from day
to day, run to run.
The weather type is more important to me than the specifics at that
sort of range.
Lamb scenarios are often a good guide, defining the types expected in
the later frames of model runs....but you still need the human factor
I think.

Good luck everyone, with the weather, you will need tons of it.

Neo
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Old November 18th 11, 12:54 PM posted to uk.sci.weather
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Default The Models will all change their long term ideas in the next 3 to 4 days.

"Eskimo Will" wrote:

Neo, it is always difficult to second-guess the models.
However, what the Met Office has been saying in the professional briefings
I have attended each morning is that the block will be very stubborn with
multiple trough disruptions helping to maintain it. This keeps most rain
in the west but means detail is very difficult even at a few days as
models struggle with trough disruptions. Len Wood mentioned in another
thread that the Rossby wavelengths are such as to maintain persistence and
he has been right so far. But, another thing we have been saying is that
the block *will* slowly erode with some form of zonality establishing
itself by the end of the month, coinciding with your thoughts to an
extent. So by December we could well be in a colder NW'ly scenario, how
cold is yet to be seen, but cold SSTs in western Atlantic would suggest to
me that a mid-Atlantic ridge could build plunging us rapidly into a bitter
northerly, note Ny Alesund has been very cold of late. This would also
retrogress the Rossby pattern and put us into the more active cold side.
Until the high topples and we settle down into a mild zonal winter :-) I
didn't say that, I'm still going for a cold and snowy December. Weather
and this newsgroup should be fun, enjoy!


Interesting stuff, thanks Will. I'm a complete novice at this stuff. Is
the high pressure over central Europe blocking the west-to-east flow,
meaning that we get more southerly winds instead? Would an early indication
of possible cold weather for the UK be the disappearance of that high
pressure over Europe?

Cheers,
John.




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