[gradsusr] Strange issues with GRADS displaying a value of 100% across small grid

[Mike Manning]

Hi Howard,

You're spot on the money - that particular domain is completely cloudy 100% across it, and it's only a tiny region.  I'm not not sure why grads cannot handle this for? It's not just the cloud cover but all variables I've seen this on (lifted index was another example yesterday).

Cheers

-----Original Message-----
From: gradsusr [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Howard Staines 
Sent: Friday, 20 September 2019 4:28 AM
To: 'GrADS Users Forum'
Subject: Re: [gradsusr] Strange issues with GRADS displaying a value of 100% across small grid

Hi Davide

The area you are displaying is a 220km x 110km roughly ... it could be very cloudy?

-----Original Message-----
From: gradsusr <gradsusr-bounces at gradsusr.org> On Behalf Of Davide Sacchetti
Sent: Friday, September 20, 2019 4:04 AM
To: gradsusr at gradsusr.org
Subject: Re: [gradsusr] Strange issues with GRADS displaying a value of 100% across small grid

it's simple
don't get lost in your script, just open the file and display the field. You'll get:

ga-> display TCDCclm
Cannot contour grid - all undefined values 
ga-> 

so data are not defined
bye
Davide


On Thu, 2019-09-19 at 17:07 +1000, Mike Manning wrote:
> Hi guys,
>  
> I have a very strange issue with Grads (all versions).  I have the 
> following grads script which you can test below:
>  
> 'sdfopen
> https://nomads.ncep.noaa.gov:9090/dods/gfs_0p25_1hr/gfs20190919/gfs_0p25_1hr_00z'
> 'set t 47'
> 'set lon 151 153'
> 'set lat -29 -28'
>  
> 'set rgb 45 254 254 254'
> 'set rgb 46 0 70 255'
> 'set rgb 48 40 100 255'
> 'set rgb 50 80 130 255'
> 'set rgb 52 120 160 255'
> 'set rgb 54 160 190 255'
> 'set rgb 56 200 220 255'
> 'set rgb 58 240 250 255'
> 'set rgb 60 255 205 95'
> 'set rgb 62 255 155 45'
> 'set rgb 63 255 130 20'
> 'set rgb 64 255 105 0'
> 'set rgb 65 255 80 0'
> 'set rgb 66 255 55 0'
> 'set rgb 67 255 30 0'
> 'set rgb 68 255 5 0'
> 'set rgb 69 230 0 0'
> 'set rgb 70 205 0 0'
> 'set rgb 71 185 0 0'
> 'set rgb 72 160 0 0'
> 'set rgb 73 135 0 0'
>  
> 'set clevs 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 
> 100'
> 'set ccols 45 46 48 50 52 54 56 58 60 62 63 64 65 66 67 68 69 70 71
> 72 73'
>  
> 'set gxout shaded'
> 'set csmooth on'
> 'set cmin 5'
> 'set cmax 100'
> 'display TCDCclm'
>  
> 'printim cloudtotal.png white'
> 'quit'
>  
> This doesn’t seem to display anything at all except a white image..
> if you change the lon from ‘set lon 151 153’ to ‘set lon 151 154’
> then it works fine as it has more than 1 value.. it’s like Grads 
> doesn’t like a value of 100? I’m sure I’ve set my ccols and clevs 
> correctly.
>  
> Cheers, Mike
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr


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