Mason,<br>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.<br><br>Jeff<br><br><div class="gmail_quote">On Mon, Jan 9, 2012 at 1:10 PM, Rowell, Mason D. <span dir="ltr"><<a href="mailto:Mason.D.Rowell-1@ou.edu">Mason.D.Rowell-1@ou.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Jeff,<br>
<br>
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.<br>
<br>
Mason<br>
________________________________________<br>
From: <a href="mailto:gradsusr-bounces@gradsusr.org">gradsusr-bounces@gradsusr.org</a> [<a href="mailto:gradsusr-bounces@gradsusr.org">gradsusr-bounces@gradsusr.org</a>] on behalf of Jeff Lake [<a href="mailto:admin@michiganwxsystem.com">admin@michiganwxsystem.com</a>]<br>
Sent: Monday, January 09, 2012 4:34 AM<br>
To: Grads<br>
Subject: [gradsusr] Scripting in GRaDS<br>
<br>
Greetings ..<br>
I have searched hi and low for someone else that has been in my situation.<br>
I need to plot relative humidity, wind chill and heat index..<br>
I have the needed perimeters from the GRIB data (Temp, Dewpt, & Wind speed)<br>
now if this php, I could do it all day ...<br>
I just can't seem to get a handle on the scripting language ..<br>
<br>
anybody want to lend a hand converting the following??<br>
<br>
rh = pow(10, (1779.75 * (dew_c - temp_c) / ((237.3 + dew_c) * (237.3 +<br>
temp_c)) + 2));<br>
<br>
--<br>
-Jeff Lake<br>
MichiganWxSystem.com<br>
WeatherMichigan.net<br>
TheWeatherCenter.net<br>
GRLevelXStuff.com<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Jeff Duda<br>Graduate research assistant<br>University of Oklahoma School of Meteorology<br>Center for Analysis and Prediction of Storms<br><br>