Re: calculating height falls

Hi Frank,

if you want to plot contour fields in GEMPAK from observed data you
will have to perform an objective analysis on that data first
(http://www.unidata.ucar.edu/software/gempak/tutorial/barnes.html).
GEMPAK is not capable of plotting contours and vectors from
irregularly spaced data, you have to convert it to a regular grid
first.
I'd say that its easier (and much faster) for a novice user to use the
initialization fields from NAM or GFS, even though the results will be
somewhat different.

Best Regards,
___________________________
               Guilherme O. Chagas
                             goc@xxxxxxx

On 10/18/06, Frank J. Marsik <marsik@xxxxxxxxx> wrote:

Greetings....

Sorry if this is an easy one, but I am new to this and have not been
able to find info on the gembud email archive.  I would like to plot the
500mb height falls (as was standard on the old DIFAX maps).  Is there a
way to do this with the observed data, or am I better off using the
initialization fields from the NAM or GFS?

Thanks in advance...

peace,
frank

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Frank J. Marsik
U-M Air Quality Laboratory            "We must remember that intelligence
Space Research Building, Rm 2109       is not enough.  Intelligence  -
2455 Hayward Ave                       plus character - that is the goal
Ann Arbor, MI  48109-2143              of true education."

Phone: 734-763-5369                             - Martin Luther King
Fax:   734-764-5137
URL: http://www.umich.edu/~marsik/

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