[gradsusr] Help with any "Hail Script"

[Ricardo Hallak]

Hi Guisseppe,

it is a interesting question.

You can start taking a look at some GFS variables that are already associated with hail.
For example, you can display a field of CICEPsfc (surface categorical ice pellets [yes=1;0=no]) as a first approach.

I haven't checked if GFS 0.5 has other variables directly asscoiated with hail, but another way is to calculate the high in which Tw goes to 0. Ideally, hail formation is expected when Tw=0 ºC occurs between 2000 and 3500 m. Take a look at Fawbush and Miller (1953): A method for forecasting haisltone size at the Earth surface. Bull. Amer. Meteoro. Soc., 34, 235-244.

Hope this helps,
Ricardo

On Wed, 26 Sep 2012 04:57:42 +0100 (BST), Guisseppe Arturo Vasq. wrote
> 
> 
> Hi Ricardo
> 
> Well i use GFS 0.5x0.5 data ... from http://nomads.ncep.noaa.gov/  
> 
> 
-----------------------------------------------------------------------
 De: Ricardo Hallak <hallak at model.iag.usp.br>
> Para: Guisseppe Arturo Vasq. <hibiki_inuyasha at yahoo.es>; GrADS Users Forum <gradsusr at gradsusr.org>; "gradsusr at gradsusr.org" <gradsusr at gradsusr.org> 
> CC: hallak at model.iag.usp.br 
> Enviado: Martes 25 de septiembre de 2012 19:58
> Asunto: Re: [gradsusr] Help with any "Hail Script"
>  
> 
> Hi Guisseppe,
> 
> it is necessary some more information. For example, what kind of data do you have in hands?
> 
> Greetings,
> Ricardo
> 
> On Tue, 25 Sep 2012 20:56:49 +0100 (BST), Guisseppe Arturo Vasq. wrote
> > Hi all,
> > 
> > Greetings!!
> > 
> > I want to know if anyone can help me with any script to see Hail, i would like to know if it's possible or if i have to mix some variables to get Hail in the map.
> > 
> > Thanks for your help
> > 
> > UNALM university, Lima-Perú
> > 
> > Guisseppe Vasquez
> > 
> > TELMET S.A.C
>

Ricardo Hallak

Departamento de Ciências Atmosféricas (ACA) 
Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG) 
Universidade de São Paulo (USP) 
Rua do Matão, 1226 - Cidade Universitária - São Paulo SP 05508-900 
Phone.: +55 (11) 3091-2850; 3091-4703 
Fax: +55 (11) 3091-4714

 
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