[Met_help] [rt.rap.ucar.edu #89030] History for Wind Question

[John Halley Gotway via RT]

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  Initial Request
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John, quick question, if I am comparing a forecast wind speed to a climo u/v wind component file, do I need to convert the climo to wind speed or does MET do this internally?

Thanks
Bob


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  Complete Ticket History
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Subject: Wind Question
From: John Halley Gotway
Time: Thu Feb 21 11:30:27 2019

Bob,

As long as the climo file is GRIB1 or GRIB2, MET will derive windspeed
on
the fly from the U and V components.

However, I would suggest running a test to confirm that there aren't
any
issues with MET or your data.  Just run plot_data_plane to plot wind
speed
from your climo data.  For example, let's say you have file named
"climo.grb" with U and V at 500mb, try running:

plot_data_plane climo.grb wind_P500.ps 'name="WIND"; level="P500";' -v
4

I used "-v 4" since at some debug level MET prints out log messages to
tell
you that it's deriving wind speed from the U and V components.

If this test goes smoothly, then I think you're all set.

Thanks,
John

On Thu, Feb 21, 2019 at 7:39 AM robert.craig.2 at us.af.mil via RT <
met_help at ucar.edu> wrote:

>
> Thu Feb 21 07:38:35 2019: Request 89030 was acted upon.
> Transaction: Ticket created by robert.craig.2 at us.af.mil
>        Queue: met_help
>      Subject: Wind Question
>        Owner: Nobody
>   Requestors: robert.craig.2 at us.af.mil
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=89030 >
>
>
> John, quick question, if I am comparing a forecast wind speed to a
climo
> u/v wind component file, do I need to convert the climo to wind
speed or
> does MET do this internally?
>
> Thanks
> Bob
>
>

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Subject: RE: [Non-DoD Source] Re: [rt.rap.ucar.edu #89030] Wind Question
From: robert.craig.2 at us.af.mil
Time: Thu Feb 21 11:37:43 2019

Worked great.  Really liking MET 8.1 so far.

Thanks
Bob

-----Original Message-----
From: John Halley Gotway via RT <met_help at ucar.edu>
Sent: Thursday, February 21, 2019 12:30 PM
To: CRAIG, ROBERT J GS-12 USAF ACC 16 WS/WXN
<robert.craig.2 at us.af.mil>
Subject: [Non-DoD Source] Re: [rt.rap.ucar.edu #89030] Wind Question

Bob,

As long as the climo file is GRIB1 or GRIB2, MET will derive windspeed
on the fly from the U and V components.

However, I would suggest running a test to confirm that there aren't
any issues with MET or your data.  Just run plot_data_plane to plot
wind speed from your climo data.  For example, let's say you have file
named "climo.grb" with U and V at 500mb, try running:

plot_data_plane climo.grb wind_P500.ps 'name="WIND"; level="P500";' -v
4

I used "-v 4" since at some debug level MET prints out log messages to
tell you that it's deriving wind speed from the U and V components.

If this test goes smoothly, then I think you're all set.

Thanks,
John

On Thu, Feb 21, 2019 at 7:39 AM robert.craig.2 at us.af.mil via RT <
met_help at ucar.edu> wrote:

>
> Thu Feb 21 07:38:35 2019: Request 89030 was acted upon.
> Transaction: Ticket created by robert.craig.2 at us.af.mil
>        Queue: met_help
>      Subject: Wind Question
>        Owner: Nobody
>   Requestors: robert.craig.2 at us.af.mil
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=89030
> >
>
>
> John, quick question, if I am comparing a forecast wind speed to a
> climo u/v wind component file, do I need to convert the climo to
wind
> speed or does MET do this internally?
>
> Thanks
> Bob
>
>



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