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20000731: no contours for lifted index

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  • Subject: 20000731: no contours for lifted index
  • Date: Mon, 31 Jul 2000 09:52:12 -0600
Tom,

When you grid LIFT from your sounding data, you will see 
in GDINFO that the gvcord=NONE and glevel=0.
In the script fragment below, I don't see level defined, but
for gdcntr it should be 0 and you need to change the coordinate 
from pres to none.

This is because LIFT is a stability index (STNDEX), rather than a
variable for a particular level.

Steve Chiswell
Unidata User Support


>From: Tom Priddy <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200007311531.e6VFVBT04439

>From: Tom Priddy/Erin Maxwell
>
>Steve....we can get the lifted index to plot but we can't seem to
>figure out how to get the data contoured and color-filled. Could
>you please take a look at the below listed gempak script and
>tell us what we are doing wrong? Thanks!
>
>
>
>
>
>set ldmdata = "/ldmdata"
>
># Path and file name convention for GEMPAK upper air data
>set upperpath = ${ldmdata}/gempak/upperair
>set snfile = ${upperpath}/${date1}_upa.gem
>
># Path and file name convention for GEMPAK upper air obj analysis grid
>file
>set gridpath = ${ldmdata}/gempak/grids
>set uprgrid = ${gridpath}/${date1}_${hh}Z_ua.gem
>
>set fname = "${date1}${hh}Z_${level}"
>set output = "${fname}.gif"
>set device_name = "gfw|${output}|792;612"
>
>rm -f *.nts ${output}
>
>snmap << EOF0
> AREA    = garea
> GAREA   = 15;-118;58;-55
> SNPARM  = lift
> DATTIM  = ${datetime}
> LEVELS  = ${level}
> VCOORD  = pres
> SNFILE  = ${snfile}
> COLORS  = 4
> MAP     = 32
> LATLON  = 0
> MARKER  = 0
> TITLE   = 32/-3/U.K Ag. Weather Center
> CLEAR   = YES
> PANEL   =
> DEVICE  = ${device_name}
> PROJ    = lcc
> FILTER  = YES
> TEXT    = 1/21//hw
> RUN
>
> EXIT
>EOF0
>
>gdcntr << EOF1
> GDATTIM = ${datetime}
> GLEVEL  = ${level}
> GVCORD  = pres
> GFUNC   = lift
> GDFILE  = ${uprgrid}
> CINT    = -6;-4;-2;0;2;4;6
> LINE    = 32/1/1/1
> MAP     = 32
> TITLE   = 32/-2/ Lifted Index Analysis
> DEVICE  = ${device_name}
> PROJ    = lcc
> GAREA   = 15;-118;58;-55
> CLEAR   = NO
> PANEL   =
> TEXT    = 1/21//hw
> SCALE   =
> LATLON  = 0
> CONTUR  =
> SKIP    =
> FINT    = -6;-4;-2;0;2;4;6
> FLINE   = 11;12;13;13;21;22;23;24
> CTYPE   = f/c
> HILO    =
> HLSYM   =
> RUN
>
> EXIT
>EOF1
>
>gpend
>
>echo " "
>echo " "
>
>/export/home/gempak/scripts/add_logo
>/export/home/gempak/scripts/LDM/${fname} latestlifted logo.gif
>
>rm -f *.nts ${output}
>
>
>--
>===========================================================================
>
>Tom Priddy,  Extension Ag. Meteorologist.....email: address@hidden
>Ag. Weather Center.............................fax: 606-257-5671
>243 Ag. Engineering Bldg.....................phone: 606-257-8803 ext 245
>
>Dept. of Biosystems and Ag. Engr.
>University of Kentucky
>Lexington, KY 40546-0276
>HOMEPAGE......................................http://wwwagwx.ca.uky.edu/
>
>===========================================================================
>
>
>