[gradsusr] visibility in wrf-nmm - possible solution

[Mark Sponsler]

I think you've done it already:

First set up clevs and colors to suit your tastes

Then:

Define vis = -1.33 + 0.45((2(tsfc - t850)) + (2 (tsfc - tdsfc)) + (2(w850)))

Display sfc


On August 23, 2015 4:58:51 PM PDT, giacomo tricarico <mino-98 at hotmail.it> wrote:
>Hi, since grads can not plot Visibility well, I have found a formula
>for calculating it:
>Visibility = −1.33 + 0.45* FOGSI 
>where FOGSI is 
>2 | Tsfc - T850 | + 2 ( Tsfc - Td sfc ) + 2 W850
>where 
>Tsfc=temperature near the surface,
> Td sfc= dew point near the surface,
> T850= temperature on 850 hPa level,
>W 850 =wind speed on 850 hPa level.
>http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.112.260&rep=rep1&type=pdfSince
>grads can plot all the variables above, how could I generate visibility
>in grads using that formula?
>Thanks all,Giacomo 		 	   		  
>
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Thanks,
Mark Sponsler
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