Establishing a 24-hour maximum value from 4 6-hour forecast hours.

[Jeffrey Duda]

Kevin,

I'm glad to hear it helped.  Indeed, templating helped me do my work much
faster as well.

Jeff

On Mon, Oct 26, 2009 at 10:33 PM, Kevin M Levey <klevey at customweather.com>wrote:

> Dear Jeff,
>
> Thanks for your response. Yes, your suggestion works just great, however,
> there is a caveat. Without templating my GFS GRIB2 files your suggestion was
> not possible. I merely used the new templating feature for g2ctl (
> http://www.cpc.noaa.gov/products/wesley/g2ctl.html) and then used your
> suggestion as in
>
> 'd max((((TMAX2m-273.16) *1.8) +32),t=9,t=15)'
>
> It produced exactly what I was looking for. If templating is not used all
> GFS GRIB files have only one t value and t does not vary and no matter what
> I did, it would not work. Templating my GFS GRIB2 files actually has allowed
> me to process my data a lot faster overall too.
>
> Regards,
>
> Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of Cape
> Town)
> Director of Meteorological Operations
> CustomWeather, Inc.
> San Francisco, California, USA
>
> "Taking the World by Storm!"
>
> http://www.customweather.com
> http://www.myforecast.com
> http://www.1stweather.com
>
> cell: 415-794-0411
> work: 415-777-3566
> email: klevey at customweather.com
>
> On Oct 26, 2009, at 10/26/09 - 4:26 PM, Jeffrey Duda wrote:
>
> I would think a simple "d max(tmp2m,t=(first),t=(last))" command should
> work.  Granted, make sure you have your horizontal domain set to the entire
> globe.
>
> Jeff Duda
>
> On Mon, Oct 26, 2009 at 6:16 PM, Kevin M Levey <klevey at customweather.com>wrote:
>
>> MON 26OCT09: 1615PDT
>>
>> Dear Grads users
>>
>> It turns out my current logic is not correct. I am trying to find the
>> highest TMAX2m value for each point on the globe  from four 6-hour GFS
>> forecast hours and then plot this value, so that the single plot will
>> show the highest value for each of the 720x181 data points from the
>> 0.5 GFS data covering a period of 24-hours. I know the answer is
>> probably simple, but I seem to making this harder than it should be.
>> Any help would be greatly appreciated.
>>
>> Thanks.
>>
>> Regards,
>>
>> Kevin M Levey, MSc in Oceans and Atmospheric Sciences (University of
>> Cape Town)
>> Director of Meteorological Operations
>> CustomWeather, Inc.
>> San Francisco, California, USA
>>
>> "Taking the World by Storm!"
>>
>> http://www.customweather.com
>> http://www.myforecast.com
>> http://www.1stweather.com
>>
>> cell: 415-794-0411
>> work: 415-777-3566
>> email: klevey at customweather.com
>>
>
>
>
> --
> Jeff Duda
> Iowa State University
> Meteorology Graduate Student
> 3134 Agronomy Hall
> www.meteor.iastate.edu/~jdduda <http://www.meteor.iastate.edu/%7Ejdduda>
>
>
>


--
Jeff Duda
Iowa State University
Meteorology Graduate Student
3134 Agronomy Hall
www.meteor.iastate.edu/~jdduda
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