[Met_help] [rt.rap.ucar.edu #66556] History for Question
John Halley Gotway via RT
met_help at ucar.edu
Thu May 15 12:04:10 MDT 2014
----------------------------------------------------------------
Initial Request
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If I had high temporal resolution model forecasts which were valid at 10-minute intervals within a given hour/minute (HHMMs are 1210, 1220, 1230, 1240, 1250 GMT) and observations which were valid at the same times, could I run this data in Point-Stat to produce error statistics? The restriction that I see, is that Point-Stat is expecting forecasts and obs valid at the top of the hour with a temporal resolution of one hour .
Thanks.
R/
John
Mr John W. Raby, Meteorologist
U.S. Army Research Laboratory
White Sands Missile Range, NM 88002
(575) 678-2004 DSN 258-2004
FAX (575) 678-1230 DSN 258-1230
Email: john.w.raby2.civ at mail.mil<mailto:john.raby at us.army.mil>
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Complete Ticket History
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Subject: Question
From: Raby, John W USA CIV
Time: Thu May 15 08:49:42 2014
Classification: UNCLASSIFIED
Caveats: NONE
I may have missed your reply to my question. Could you check the
status?
Thanks.
John
-----Original Message-----
From: met_help at ucar.edu via RT [mailto:met_help at ucar.edu]
Sent: Wednesday, April 30, 2014 3:31 PM
To: Raby, John W CIV USARMY ARL (US)
Subject: [rt.rap.ucar.edu #66556] AutoReply: Question
Greetings,
This message has been automatically generated in response to the
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trouble ticket regarding:
"Question",
a summary of which appears below.
There is no need to reply to this message right now. Your ticket has
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assigned an ID of [rt.rap.ucar.edu #66556].
Please include the string:
[rt.rap.ucar.edu #66556]
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Thank you,
met_help at ucar.edu
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If I had high temporal resolution model forecasts which were valid at
10-minute intervals within a given hour/minute (HHMMs are 1210, 1220,
1230,
1240, 1250 GMT) and observations which were valid at the same times,
could I
run this data in Point-Stat to produce error statistics? The
restriction that
I see, is that Point-Stat is expecting forecasts and obs valid at the
top of
the hour with a temporal resolution of one hour .
Thanks.
R/
John
Mr John W. Raby, Meteorologist
U.S. Army Research Laboratory
White Sands Missile Range, NM 88002
(575) 678-2004 DSN 258-2004
FAX (575) 678-1230 DSN 258-1230
Email: john.w.raby2.civ at mail.mil<mailto:john.raby at us.army.mil>
Classification: UNCLASSIFIED
Caveats: NONE
------------------------------------------------
Subject: Re: [rt.rap.ucar.edu #66556] AutoReply: Question (UNCLASSIFIED)
From: John Halley Gotway
Time: Thu May 15 10:43:57 2014
John,
I apologize for delay in getting back to you! This met_help ticket
slipped through the cracks, and I just missed it. Sorry about that.
To answer your question - yes, I fully expect that point_stat should
be able to handle sub-hourly forecasts just fine. If fact, I'm glad
that someone will actually be using that capability. Time
strings in MET are specified in YYYYMMDD[_HH[MMSS]] format. Those
brackets mean that that portion is optional. So 20140215,
20140215_00, and 20140215_000000 are all valid ways of specifying the
same
date/time. Since you're dealing with sub-hourly data, you'll use the
full format to specify timing information: YYYYMMDD_HHMMSS.
Keep in mind that you need to specify a matching time window in the
point_stat config file. If your observations occur exactly at the
same time as your forecasts, you could just set the matching time
window to 0:
obs_window = {
beg = 0;
end = 0;
}
Otherwise, if you keep it too large, you'll get a lot more matched
pairs than you expected. If the times aren't really exactly and
you're evaluating forecasts every 10 minutes, you could set the time
window to +/- 5 minutes.
Please go ahead and give it a shot and let me know if any specific
issues come up in your use of point_stat on this data.
Thanks,
John Halley Gotway
met_help at ucar.edu
On 05/15/2014 08:49 AM, Raby, John W USA CIV via RT wrote:
>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=66556 >
>
> Classification: UNCLASSIFIED
> Caveats: NONE
>
> I may have missed your reply to my question. Could you check the
status?
> Thanks.
> John
>
> -----Original Message-----
> From: met_help at ucar.edu via RT [mailto:met_help at ucar.edu]
> Sent: Wednesday, April 30, 2014 3:31 PM
> To: Raby, John W CIV USARMY ARL (US)
> Subject: [rt.rap.ucar.edu #66556] AutoReply: Question
>
> Greetings,
>
> This message has been automatically generated in response to the
creation of a
> trouble ticket regarding:
> "Question",
> a summary of which appears below.
>
> There is no need to reply to this message right now. Your ticket
has been
> assigned an ID of [rt.rap.ucar.edu #66556].
>
> Please include the string:
>
> [rt.rap.ucar.edu #66556]
>
> in the subject line of all future correspondence about this issue.
To do so,
> you may reply to this message.
>
> Thank you,
> met_help at ucar.edu
>
>
-------------------------------------------------------------------------
> If I had high temporal resolution model forecasts which were valid
at
> 10-minute intervals within a given hour/minute (HHMMs are 1210,
1220, 1230,
> 1240, 1250 GMT) and observations which were valid at the same times,
could I
> run this data in Point-Stat to produce error statistics? The
restriction that
> I see, is that Point-Stat is expecting forecasts and obs valid at
the top of
> the hour with a temporal resolution of one hour .
>
> Thanks.
>
> R/
> John
>
>
> Mr John W. Raby, Meteorologist
>
> U.S. Army Research Laboratory
>
> White Sands Missile Range, NM 88002
>
> (575) 678-2004 DSN 258-2004
>
> FAX (575) 678-1230 DSN 258-1230
>
> Email: john.w.raby2.civ at mail.mil<mailto:john.raby at us.army.mil>
>
>
> Classification: UNCLASSIFIED
> Caveats: NONE
>
>
>
------------------------------------------------
Subject: Question
From: Raby, John W USA CIV
Time: Thu May 15 11:44:20 2014
Classification: UNCLASSIFIED
Caveats: NONE
John -
No problem with the delay. I am just exploring this for an anticipated
requirement.
Thanks for pointing out the time string options. I overlooked the
description
of time strings given in the User's Guide where it shows the same
options you
list below.
I don't have the model output yet, but when I do, I will try this and
let you
know.
R/
John
-----Original Message-----
From: John Halley Gotway via RT [mailto:met_help at ucar.edu]
Sent: Thursday, May 15, 2014 10:44 AM
To: Raby, John W CIV USARMY ARL (US)
Subject: Re: [rt.rap.ucar.edu #66556] AutoReply: Question
(UNCLASSIFIED)
John,
I apologize for delay in getting back to you! This met_help ticket
slipped
through the cracks, and I just missed it. Sorry about that.
To answer your question - yes, I fully expect that point_stat should
be able
to handle sub-hourly forecasts just fine. If fact, I'm glad that
someone will
actually be using that capability. Time strings in MET are specified
in
YYYYMMDD[_HH[MMSS]] format. Those brackets mean that that portion is
optional. So 20140215, 20140215_00, and 20140215_000000 are all valid
ways of
specifying the same date/time. Since you're dealing with sub-hourly
data,
you'll use the full format to specify timing information:
YYYYMMDD_HHMMSS.
Keep in mind that you need to specify a matching time window in the
point_stat
config file. If your observations occur exactly at the same time as
your
forecasts, you could just set the matching time window to 0:
obs_window = {
beg = 0;
end = 0;
}
Otherwise, if you keep it too large, you'll get a lot more matched
pairs than
you expected. If the times aren't really exactly and you're
evaluating
forecasts every 10 minutes, you could set the time window to +/- 5
minutes.
Please go ahead and give it a shot and let me know if any specific
issues come
up in your use of point_stat on this data.
Thanks,
John Halley Gotway
met_help at ucar.edu
On 05/15/2014 08:49 AM, Raby, John W USA CIV via RT wrote:
>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=66556 >
>
> Classification: UNCLASSIFIED
> Caveats: NONE
>
> I may have missed your reply to my question. Could you check the
status?
> Thanks.
> John
>
> -----Original Message-----
> From: met_help at ucar.edu via RT [mailto:met_help at ucar.edu]
> Sent: Wednesday, April 30, 2014 3:31 PM
> To: Raby, John W CIV USARMY ARL (US)
> Subject: [rt.rap.ucar.edu #66556] AutoReply: Question
>
> Greetings,
>
> This message has been automatically generated in response to the
> creation of a trouble ticket regarding:
> "Question",
> a summary of which appears below.
>
> There is no need to reply to this message right now. Your ticket
has
> been assigned an ID of [rt.rap.ucar.edu #66556].
>
> Please include the string:
>
> [rt.rap.ucar.edu #66556]
>
> in the subject line of all future correspondence about this issue.
To
> do so, you may reply to this message.
>
> Thank you,
> met_help at ucar.edu
>
>
----------------------------------------------------------------------
> --- If I had high temporal resolution model forecasts which were
valid
> at 10-minute intervals within a given hour/minute (HHMMs are 1210,
> 1220, 1230, 1240, 1250 GMT) and observations which were valid at the
> same times, could I run this data in Point-Stat to produce error
> statistics? The restriction that I see, is that Point-Stat is
> expecting forecasts and obs valid at the top of the hour with a
> temporal resolution of one hour .
>
> Thanks.
>
> R/
> John
>
>
> Mr John W. Raby, Meteorologist
>
> U.S. Army Research Laboratory
>
> White Sands Missile Range, NM 88002
>
> (575) 678-2004 DSN 258-2004
>
> FAX (575) 678-1230 DSN 258-1230
>
> Email: john.w.raby2.civ at mail.mil<mailto:john.raby at us.army.mil>
>
>
> Classification: UNCLASSIFIED
> Caveats: NONE
>
>
>
Classification: UNCLASSIFIED
Caveats: NONE
------------------------------------------------
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