[Met_help] [rt.rap.ucar.edu #48082] History for Ensemble Stat Tool Question
RAL HelpDesk {for Paul Oldenburg}
met_help at ucar.edu
Fri Jul 22 13:51:26 MDT 2011
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Initial Request
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Hi, I wrote previously but have just now registered. I was just wondering if there is a way to weight various forecasts differently using the Ensemble-Stat Tool. For example, if I was using five different forecasts and wanted to make the most recent model run with a weight of 5/15 and the oldest run 1/15 is there a way to do this?
Thank you
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Complete Ticket History
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Subject: Re: [rt.rap.ucar.edu #48082] Ensemble Stat Tool Question
From: Paul Oldenburg
Time: Wed Jul 06 09:53:38 2011
Cailee,
I assume that you are trying to use ensemble_stat to generate the
ensemble mean, and you want to weight the effect of
the models on the mean? If so, there is no way in MET to do so
directly. A colleague suggested the idea of creating an
ensemble mean with the weights you mentioned by passing fifteen model
files to ensemble_stat in such a way that each
time you include one of your five files in the list, it gets weighted
by 1/15th. Thus, if you want to weight a
particular file by 5/15, include it five times in the list of 15
members. Does this make sense?
In general, MET was not intended to be used to generate ensemble
products - only as a verification tool. The designed
purpose of ensemble_stat is to evaluate existing ensemble products.
You may want to consider using other software to
generate ensemble products, and then verify those products in MET.
Please let us know if you have any other questions.
Thanks,
Paul
On 07/05/2011 07:56 PM, RAL HelpDesk {for Kelly, Cailee} wrote:
>
> Tue Jul 05 19:56:47 2011: Request 48082 was acted upon.
> Transaction: Ticket created by caileek at ku.edu
> Queue: met_help
> Subject: Ensemble Stat Tool Question
> Owner: Nobody
> Requestors: caileek at ku.edu
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=48082 >
>
>
> Hi, I wrote previously but have just now registered. I was just
wondering if there is a way to weight various forecasts differently
using the Ensemble-Stat Tool. For example, if I was using five
different forecasts and wanted to make the most recent model run with
a weight of 5/15 and the oldest run 1/15 is there a way to do this?
>
> Thank you
------------------------------------------------
Subject: RE: [rt.rap.ucar.edu #48082] Ensemble Stat Tool Question
From: Kelly, Cailee
Time: Wed Jul 06 12:26:30 2011
Paul,
I appreciate your quick response and solution to my question, it makes
perfect sense and I will try that tactic out.
Thank you,
Cailee
________________________________________
From: RAL HelpDesk {for Paul Oldenburg} [met_help at ucar.edu]
Sent: Wednesday, July 06, 2011 10:53 AM
To: Kelly, Cailee
Subject: Re: [rt.rap.ucar.edu #48082] Ensemble Stat Tool Question
Cailee,
I assume that you are trying to use ensemble_stat to generate the
ensemble mean, and you want to weight the effect of
the models on the mean? If so, there is no way in MET to do so
directly. A colleague suggested the idea of creating an
ensemble mean with the weights you mentioned by passing fifteen model
files to ensemble_stat in such a way that each
time you include one of your five files in the list, it gets weighted
by 1/15th. Thus, if you want to weight a
particular file by 5/15, include it five times in the list of 15
members. Does this make sense?
In general, MET was not intended to be used to generate ensemble
products - only as a verification tool. The designed
purpose of ensemble_stat is to evaluate existing ensemble products.
You may want to consider using other software to
generate ensemble products, and then verify those products in MET.
Please let us know if you have any other questions.
Thanks,
Paul
On 07/05/2011 07:56 PM, RAL HelpDesk {for Kelly, Cailee} wrote:
>
> Tue Jul 05 19:56:47 2011: Request 48082 was acted upon.
> Transaction: Ticket created by caileek at ku.edu
> Queue: met_help
> Subject: Ensemble Stat Tool Question
> Owner: Nobody
> Requestors: caileek at ku.edu
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=48082 >
>
>
> Hi, I wrote previously but have just now registered. I was just
wondering if there is a way to weight various forecasts differently
using the Ensemble-Stat Tool. For example, if I was using five
different forecasts and wanted to make the most recent model run with
a weight of 5/15 and the oldest run 1/15 is there a way to do this?
>
> Thank you
------------------------------------------------
Subject: RE: [rt.rap.ucar.edu #48082] Ensemble Stat Tool Question
From: Kelly, Cailee
Time: Wed Jul 06 12:27:33 2011
Paul,
I appreciate your quick response and solution to my question, it makes
perfect sense and I will try that tactic out.
Thank you,
Cailee
________________________________________
From: RAL HelpDesk {for Paul Oldenburg} [met_help at ucar.edu]
Sent: Wednesday, July 06, 2011 10:53 AM
To: Kelly, Cailee
Subject: Re: [rt.rap.ucar.edu #48082] Ensemble Stat Tool Question
Cailee,
I assume that you are trying to use ensemble_stat to generate the
ensemble mean, and you want to weight the effect of
the models on the mean? If so, there is no way in MET to do so
directly. A colleague suggested the idea of creating an
ensemble mean with the weights you mentioned by passing fifteen model
files to ensemble_stat in such a way that each
time you include one of your five files in the list, it gets weighted
by 1/15th. Thus, if you want to weight a
particular file by 5/15, include it five times in the list of 15
members. Does this make sense?
In general, MET was not intended to be used to generate ensemble
products - only as a verification tool. The designed
purpose of ensemble_stat is to evaluate existing ensemble products.
You may want to consider using other software to
generate ensemble products, and then verify those products in MET.
Please let us know if you have any other questions.
Thanks,
Paul
On 07/05/2011 07:56 PM, RAL HelpDesk {for Kelly, Cailee} wrote:
>
> Tue Jul 05 19:56:47 2011: Request 48082 was acted upon.
> Transaction: Ticket created by caileek at ku.edu
> Queue: met_help
> Subject: Ensemble Stat Tool Question
> Owner: Nobody
> Requestors: caileek at ku.edu
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=48082 >
>
>
> Hi, I wrote previously but have just now registered. I was just
wondering if there is a way to weight various forecasts differently
using the Ensemble-Stat Tool. For example, if I was using five
different forecasts and wanted to make the most recent model run with
a weight of 5/15 and the oldest run 1/15 is there a way to do this?
>
> Thank you
------------------------------------------------
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