[GEMPAK #NZZ-240543]: Several questions

*text was cut-off in my previous reply*


Kevin,

RE: gridded hail size, you're going to need write hail size data into SFLIST 
format for importing into a GEMPAK surface file.

in short:


1) format hail size into readable format

2) create empty surface file with SFCFIL
http://www.unidata.ucar.edu/cgi-bin/gempak/manual/programs_index?sfcfil

3) import hail size into this surface file with SFEDIT
http://www.unidata.ucar.edu/cgi-bin/gempak/manual/programs_index?sfedit

4) create an empty grid file with GDCFIL
http://www.unidata.ucar.edu/cgi-bin/gempak/manual/programs_index?gdcfil

5) perform an objective analysis on your surface data using OABSFC
http://www.unidata.ucar.edu/cgi-bin/gempak/manual/programs_index?oabsfc

--------------


more detailed:

1) as of now you have hail size saved in a surface file of the form (making an 
example of a 2-station file):

KSTL 724340 ST._LOUIS/LAMBERT MO US 3875 -9037 172 0 0.
KCGI 723489 CAPE_GIRARDEAU_MUNI MO US 3723 -8957 104 0 2.35

what we need is a separate file of the form:

PARM = HAIL

KSTL 100607/1200 0.00
KCGI 100607/1200 2.35

with date/time specified.

the first line specifies the parm names for columns that come after date/time, 
so if you wanted to plot both hail size and tmpf, for example, your file would 
look like.

PARM = TMPF;HAIL

KSTL 100607/1200 77.7 0.00
KCGI 100607/1200 88.8 2.35

*NOTE* - if you have both TMPF and HAIL specified in your file, like this 
example, and you want to add both TMPF and HAIL to your GEMPAK surface file, 
you will need to specify both when creating your file with SFCFIL.

make sense? (let's assume we only have hail size and not tmpf for the rest of 
this problem)

so now you have your original "rucstns6_max" file and this new file we'll call 
"rucstns6.fil"

--------------



2) your next step is to create a surface gempak file using SFCFIL.

GEMPAK-SFCFIL>
SFOUTF = hail.sfc
SFPRMF = HAIL
STNFIL = rucstns6_max
SHIPFL = NO
TIMSTN = 1/0
SFFSRC = text
GEMPAK-SFCFIL>r

the new (empty) surface file is called "hail.sfc" and "rucstns6_max" is 
specified as the station information file.

run this and you should have an empty surface file approx. ~17k

--------------



3) run SFEDIT to add hail size values to hail.sfc with SFEFIL = rucstns6.fil

GEMPAK-SFEDIT>l
SFEFIL = rucstns6.fil
SFFILE = hail.sfc
GEMPAK-SFEDIT>r

you should see:

SFEDIT PARAMETERS:

Edit file: rucstns6.fil
Output surface file: hail.sfc

Parameters to be added to file:

HAIL
Enter <cr> to accept parameters or type EXIT:

--------------

now exit SFEDIT and check your file with SFLIST

GEMPAK-SFLIST>l
SFFILE = hail.sfc
AREA = dset
DATTIM = all
SFPARM = HAIL
OUTPUT = T
IDNTYP = STID
GEMPAK-SFLIST>r

you should see
PARM = HAIL

STN YYMMDD/HHMM HAIL
KSTL 100607/1200 0.00
KCGI 100607/1200 2.35

* note here that 100607/1200 is the tmp date/time I specified when creating 
rucstns6.fil

--------------


4) create an empty grid file with GDCFIL
http://www.unidata.ucar.edu/cgi-bin/gempak/manual/programs_index?gdcfil

GEMPAK-GDCFIL>l
 GDOUTF   = hail.gem
 PROJ     = MER
 GRDAREA  = us
 KXKY     = 10;10
 MAXGRD   = 200
 CPYFIL   = copy.gem
 ANLYSS   = 4/2;2;2;2
GEMPAK-GDCFIL>

where copy.gem is an existing grid/model file specified for navigation.

you should see:

Creating process: gplt for queue 557058

 GDCFIL PARAMETERS: 

 New grid file:         hail.gem                                                
                                                                        
 File copied:           copy.gem                                                
                               
 Grid projection:       MER                                                     
                                                                        
 Grid area:             us                                                      
                                                                        
 Grid dimension:        10;10                                                   
                                                                        
 Grid anlysis:          4/2;2;2;2                                               
                                                                        
 Maximum number of grids that can be added to file  200                         
                                                                                
                    
Enter <cr> to accept parameters or type EXIT:

--------------


5) perform an objective analysis on your surface data using OABSFC

outlined in detail in the following two links:

http://www.unidata.ucar.edu/cgi-bin/gempak/manual/programs_index?oabsfc

http://www.unidata.ucar.edu/software/gempak/tutorial/barnes3.html










Ticket Details
===================
Ticket ID: NZZ-240543
Department: Support GEMPAK
Priority: Critical
Status: Open