[gradsusr] Wind-chill parameter GrADS -

[L.B.]

Leopoldo,

Unfortunately, you'll need to convert your KPH to MPH and C to F to input
into the equation, and then convert the windchill temp back to C
afterwards. It's a little tedious, but the equation only works with F and
MPH. The whole regression equation would have to be changed to work with
KPH and C by default.

*William (L.B.) LaForce*
Meteorologist
Central Michigan University '13
www.tornadoinsanity.com


On Sun, Feb 23, 2014 at 2:30 PM, Leopoldo Alvarez <lap.bolsa at gmail.com>wrote:

>  Hi Willians,
>
>  - [1] I used your formulation but using degrees Celsius (ºC) and KPH... I don´t
> know if it is valid...
> Now temperature is more low...mmmh
>
> 'define chill =
> 35.74+0.6215*(t-273.15)-35.75*pow((tg1*3.6),0.16)+0.4275*(t-273.15)*pow((tg1*3.6),0.16))'
>
>  Date / wind (KPH) / temp (ºC) / windchill (ºC)
> 2014-FEB-19-13Z  27.5996  18.8929   0.426981
> 2014-FEB-19-14Z  31.2976  19.2836   0.00337819
> 2014-FEB-19-15Z  31.2976  19.0446  -0.322477
>
>
>  -[2] In other  formulation the difference was less ...
> http://www.wrfems.info/viewtopic.php?f=6&t=742
> - 'tg2' is wind variable (KPH)
> 'define wis=pow((tg2),0.16)'
> 'define windchill = 13.112 + 0.6215*(t-273.15) - 11.37*wis +
> 0.3965*(t-273.15)*wis'
> 'd windchill'
>
> here I find little difference, I wonder...
>
>  Date / wind (KPH) / temp (ºC) / windchill (ºC)
> 2014-FEB-19-13Z  27.5996  18.8929  18.2582
> 2014-FEB-19-14Z  31.2976  19.2836  18.6358
> 2014-FEB-19-15Z  31.2976  19.0446  18.3228
>
> If your test this web with my data [2], is similar windchill..
> http://www.csgnetwork.com/windchillcalc.html
>
> Best,
>
> Leopoldo
>
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