[gradsusr] Scripting in GRaDS

[Jeff Duda]

Mason,
I haven't tried using the actual formula.  I'm not sure where that guy got
them from either, but I would do the same thing you mentioned to get RH.

Jeff

On Mon, Jan 9, 2012 at 1:10 PM, Rowell, Mason D. <Mason.D.Rowell-1 at ou.edu>wrote:

> Jeff,
>
> Does this equation fail to provide you with physically relevant RH
> numbers, or does grads not accept the format? I'm unfamiliar with the
> formula. For a less precise route, I would use dew_c, convert to kelvin and
> use inverse CC equation to find find es, and divide e (from CC equation and
> t_c, converted to kelvin) by es. Use the pressure and these to instead get
> w/ws for more accurate result.
>
> Mason
> ________________________________________
> From: gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] on
> behalf of Jeff Lake [admin at michiganwxsystem.com]
> Sent: Monday, January 09, 2012 4:34 AM
> To: Grads
> Subject: [gradsusr] Scripting in GRaDS
>
> Greetings ..
> I have searched hi and low for someone else that has been in my situation.
> I need to plot relative humidity, wind chill and heat index..
> I have the needed perimeters from the GRIB data (Temp, Dewpt, & Wind speed)
> now if this php, I could do it all day ...
> I just can't seem to get a handle on the scripting language ..
>
> anybody want to lend a hand converting the following??
>
> rh = pow(10, (1779.75 * (dew_c - temp_c) / ((237.3 + dew_c) * (237.3 +
> temp_c)) + 2));
>
> --
> -Jeff Lake
> MichiganWxSystem.com
> WeatherMichigan.net
> TheWeatherCenter.net
> GRLevelXStuff.com
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>



-- 
Jeff Duda
Graduate research assistant
University of Oklahoma School of Meteorology
Center for Analysis and Prediction of Storms
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20120109/cb5e80b3/attachment-0003.html