Updated plotskew.gs routine

[Robert Hart]

Hi Mr OOI See-hai

For (1), this warning message is normal.  Your data only extends from 1000 to 200mb, yet
you are requesting the display extend to 150mb and below to 1050mb.   It's just a warning.

For (2) You would have to add an extra level to the output in the file.   Before writing 1000mb
data, you should write your surface pressure data for temperature, etc.   And then add
the surface pressure as the first level in the ZDEF line.

Bob Hart

----- Original Message -----
From: See Hai Ooi <axl419 at yahoo.com>
Date: Sunday, August 16, 2009 11:01 am
Subject: Re: Updated plotskew.gs routine
To: rhart at fsu.edu
Cc: GRADSUSR at LIST.CINECA.IT

> Dear Dr Robert Hart,
>
>     Based on your updated routine of the above, I used GrADS
> window version 2.0.a5.oga.5 to plot an upperair data set as
> attached. Grateful if you could kindly respond to my following
> problems and queries :-
>
>     (1) If I set the levels from 1050 to 150 hPa, I obtained
>            "Data Request Warning: Request beyond file limits"
>     (2) In your sample control file, I could not see any surface
> data given but your plot shows it.  How did you do it ?  In my
> case, I obtained parameters such as CAPE for only the lowest level,
> i.e. 1000 hPa.
>
>     Regards.
>
> Sincerely,
>
> (Mr) OOI See-hai
> a retired meteorologist
> Kuala Lumpur, Malaysia
>
>
>
> --- On Sat, 8/8/09, Robert Hart <rhart at FSU.EDU> wrote:
>
> > From: Robert Hart <rhart at FSU.EDU>
> > Subject: Updated plotskew.gs routine
> > To: GRADSUSR at LIST.CINECA.IT
> > Date: Saturday, 8 August, 2009, 3:53 AM
> > GrADS Users,
> >
> > For the first time in seven years I've updated the plotskew.gs
> SkewT/LogP function.
> >
> > Improvements include:
> >   * Replacement of old CAPE/CIN function to a version more
> precise and with more options, from converting George Bryan
> (NCAR)'s Fortran90 version to GrADS scripting. (Thank you George).
> >
> >   * Finally utilizing the math_* intrinsic functions to speed up
> performance.>
> >   * Fixing a few bugs related to interacting options.
> >
> >   * Adding color to a few additional features to improve visibility.
> >
> > Given the improvement and accuracy in the CAPE/CIN calculations
> of this version, I strongly recommend anyone who uses plotskew.gs
> (which I believe is in the hundreds by now) to grab the latest
> version at:
> >
> > http://moe.met.fsu.edu/~rhart/software/skew.html
> >
> > Please do check back at this URL occasionally for additional
> small bug fixes and improvements as they may occur.
> >
> > Don't hesitate to contact me if you have any questions or problems.
> >
> > Bob Hart
> > Assoc. Professor
> > FSU Meteorology
>
>
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