[gradsusr] Gridding and Plotting Station Data

Huddleston, John Huddleston at cira.colostate.edu
Wed Sep 22 10:19:29 EDT 2010

Hi Nena,

That specific WRF data would only apply to your work if you were working on that day in that area. The concept of that example was to use WRF data as the background and real observed data plotted over it.

I looked at Yaqiang's MeteoInfo distribution and you may be able to make it work for you.

GrADS can plot observed data, see http://cookbooks.opengrads.org/index.php?title=Recipe-005:_Creating_GrADS_binary_station_data_from_ASCII as well.

The previous cookbook link you gave has source code that needs tweaking to work. If you are a C programmer then it should be easy.

Let us know if you need additional assistance.


John Huddleston, PhD
Cooperative Institute for Research in the Atmosphere

From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Nena Carina Española
Sent: Tuesday, September 21, 2010 9:34 PM
To: GrADS Users Forum
Subject: Re: [gradsusr] Gridding and Plotting Station Data

Hi John. Thanks for the reply.

The recipe was derived from the operational procedure of Brazil and we wanted to adopt a similar procedure for the Philippines. I am from the IT sector so I'm really new to all of these. What I actually wanted to ask about is the numerical model data itself. I don't have that. I only have observed data from AWS network. Can I actually use the wrf.dat that came with the recipe or do I have to create my own from WRF? :-)

What our team wants is to be able to visualize the hourly data we have for temperature, humidity, pressure, wind speed, wind direction, solar radiation, and hourly rain. But our priority is pressure, wind speed, and wind direction. If you know of other techniques/recipes that I could follow please let me know.

Thanks and BR,


On Tuesday, 21 September, 2010 07:40 PM, Huddleston, John wrote:

run 'grads -l'
open wrf.ctl
set gxout shaed
set csmooth on
d slvl.1

and you will see the background color as shown in the example

set lon -43.75 -43.1
set lat -23.1 -22.7
d slvl.1

and it zooms into the area where the data points can be plotted

John Huddleston, PhD

From: gradsusr-bounces at gradsusr.org<mailto:gradsusr-bounces at gradsusr.org> [gradsusr-bounces at gradsusr.org<mailto:gradsusr-bounces at gradsusr.org>] On Behalf Of Nena Carina Española [nena at asti.dost.gov.ph<mailto:nena at asti.dost.gov.ph>]
Sent: Tuesday, September 21, 2010 12:24 AM
To: GrADS Users Forum
Subject: [gradsusr] Gridding and Plotting Station Data
Hi Guys,

First of all, I'm not a meteorologist so pardon me if my questions here might sound silly to you. :-)

I need help with Recipe-013: Gridding and Plotting Station Data<http://cookbooks.opengrads.org/index.php?title=Recipe-013:_Gridding_and_Plotting_Station_Data>. What I need to do is to be able to plot contour maps from hourly AWS data, just like what was done in Recipe-013. However, I won't be plotting just precipitation. I'll just start out with pressure. Later on if I already know the ins and outs of this recipe, I'll be creating plots for other variables such as temperature, wind speed, and wind direction.

We have a team in charge of parsing the information from AWS and could feed me data that's already been formatted to what Recipe-013 requires. Following the recipe, I was able to create a control file and binary that GrADS could read. What I don't understand is the wrf.dat and wrf.ctl that the recipe is using. The recipe says it "contains any forecasted variable and, most important, the information of the grid we want the station data to be gridded to." Can someone explain this further to me? I was only asked to plot actual data, no forecasting or whatsoever. :-)

Thanks and regards,



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Advanced Science & Technology Institute
Department Of Science & Technology
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Email: nena at asti.dost.gov.ph <mailto:nena at asti.dost.gov.ph>
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