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20050104: wshr function

On Tue, 2005-01-04 at 10:22, Christopher Hennon wrote:
> Hello,
> Can anyone tell me why gddiag needs a 'TMPK' grid to calculate the
> vertical wind shear of a layer?

TMPK is used in computation of THTA for the layer to arrive at DZ
in pressure coordinates. see equation used in:
$NAWIPS/doc/User_guide/pdf/apxB1.pdf

Steve Chiswell
Unidata User Support



> 
> GDFILE  = wind.grd
> GDOUTF = wind.grd
> GFUNC  = wshr(wnd)
> GDATTIM = 990101/0000
> GLEVEL  = 200:850
> GVCORD = PRES
> GRDNAM = wshr
> GPACK  = 
> 
> GDDIAG > r
> [DG -7] Input grid TMPK ^990101/0000 @200 %PRES in WSHR cannot be
> found.
> 
> The grid file contains U and V winds at 200 and 850 mb.  Thanks.
> 
> Chris
> 
> -- 
> --------------------------------------------------------
> Christopher C. Hennon
> Postdoctoral Fellow
> UCAR Visiting Scientist Program
> 
> NOAA TPC/National Hurricane Center
> 11691 SW 17 St.
> Miami, FL  33165
> 
> Phone: (305) 229-4429
> Fax   :   (305) 553-1901
> --------------------------------------------------------