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20010413: model data question




On Wed, 11 Apr 2001, Kevin Polston wrote:

> Hi Steve,
> 
> I have a question that maybe you can answer for me.  I have been
> downloading now for quite some time the ETA 211 grid. That is the one
> that is out through 60 hours at 3 hour intervals. For the most part I
> don't have a problem with it but I have noticed a couple of things I
> hope you can help me with. First......on a regular basis.....the
> moisture grid at 57 hours does not seem to be there. Any parameter I
> display that uses the "moisture field" (ie, dwpt, relh, etc) will not
> display at 57 hours.  Second, there does not seem to be a helicity grid
> and I was wondering why this is the case. I have a function which
> calculates (supposedly) storm relative helicity but the values seem just
> a little bit on the high side. I would like to be able to calculate
> other fields (such as EHI) and it would be alot easier - and potentially
> more accurate I believe - if the helicity grid was there. So I was
> wondering if you had any information on this. Also, is there another ETA
> grid I should be downloading instead of the 211 grid? Maybe that one
> would have the helicity grid file with it. Also, what is the ETA file to
> grab to go out to 84 hours....or is that not available yet?  Any help
> would be appreciated.
>

ETA is only 60 hours, 50 levels at present. The NWS EMC pages detail
model changes to 22km runs and extended forecast runs.

On NOAAPORT, ETA211 is every 6 hours through 60 hours:
   25     010413/1200F000                       3000  0      HGHT HLCY        
  179     010413/1200F006                       3000  0      HGHT HLCY        
  334     010413/1200F012                       3000  0      HGHT HLCY        
  489     010413/1200F018                       3000  0      HGHT HLCY        
  644     010413/1200F024                       3000  0      HGHT HLCY        
  799     010413/1200F030                       3000  0      HGHT HLCY        
  954     010413/1200F036                       3000  0      HGHT HLCY        
 1109     010413/1200F042                       3000  0      HGHT HLCY        
 1264     010413/1200F048                       3000  0      HGHT HLCY        
 1419     010413/1200F054                       3000  0      HGHT HLCY        
 1574     010413/1200F060                       3000  0      HGHT HLCY


On the ftp servers at NWS, ETA 212 (40km grid) is 3 hrly and has 57 hours:
 Number of grids in file: 11845

 Maximum number of grids in file:  12000

  NUM       TIME1              TIME2           LEVL1 LEVL2  VCORD PARM
   66     010413/1200F000                       3000  0      HGHT HLCY        
  621     010413/1200F003                       3000  0      HGHT HLCY        
 1184     010413/1200F006                       3000  0      HGHT HLCY        
 1749     010413/1200F009                       3000  0      HGHT HLCY        
 2314     010413/1200F012                       3000  0      HGHT HLCY        
 2879     010413/1200F015                       3000  0      HGHT HLCY        
 3442     010413/1200F018                       3000  0      HGHT HLCY        
 4007     010413/1200F021                       3000  0      HGHT HLCY        
 4572     010413/1200F024                       3000  0      HGHT HLCY        
 5137     010413/1200F027                       3000  0      HGHT HLCY        
 5700     010413/1200F030                       3000  0      HGHT HLCY        
 6265     010413/1200F033                       3000  0      HGHT HLCY        
 6830     010413/1200F036                       3000  0      HGHT HLCY        
 7395     010413/1200F039                       3000  0      HGHT HLCY        
 7958     010413/1200F042                       3000  0      HGHT HLCY        
 8523     010413/1200F045                       3000  0      HGHT HLCY        
 9088     010413/1200F048                       3000  0      HGHT HLCY        
 9653     010413/1200F051                       3000  0      HGHT HLCY        
10216     010413/1200F054                       3000  0      HGHT HLCY        
10781     010413/1200F057                       3000  0      HGHT HLCY        
11346     010413/1200F060                       3000  0      HGHT HLCY  

on NOAAPORT, ETA grid 215 (20km) has HLCY through 60 hours on 0/12Z, but
all fields only through 48 hours at 6/18Z

 Number of grids in file:  1353

 Maximum number of grids in file:   2000

  NUM       TIME1              TIME2           LEVL1 LEVL2  VCORD PARM
   27     010413/1200F000                       3000  0      HGHT HLCY        
   90     010413/1200F003                       3000  0      HGHT HLCY        
  153     010413/1200F006                       3000  0      HGHT HLCY        
  218     010413/1200F009                       3000  0      HGHT HLCY        
  283     010413/1200F012                       3000  0      HGHT HLCY        
  348     010413/1200F015                       3000  0      HGHT HLCY        
  411     010413/1200F018                       3000  0      HGHT HLCY        
  476     010413/1200F021                       3000  0      HGHT HLCY        
  541     010413/1200F024                       3000  0      HGHT HLCY        
  606     010413/1200F027                       3000  0      HGHT HLCY        
  669     010413/1200F030                       3000  0      HGHT HLCY        
  734     010413/1200F033                       3000  0      HGHT HLCY        
  799     010413/1200F036                       3000  0      HGHT HLCY        
  864     010413/1200F039                       3000  0      HGHT HLCY        
  927     010413/1200F042                       3000  0      HGHT HLCY        
  992     010413/1200F045                       3000  0      HGHT HLCY        
 1057     010413/1200F048                       3000  0      HGHT HLCY        
 1122     010413/1200F051                       3000  0      HGHT HLCY        
 1185     010413/1200F054                       3000  0      HGHT HLCY        
 1250     010413/1200F057                       3000  0      HGHT HLCY        
 1315     010413/1200F060                       3000  0      HGHT HLCY  


 
> How is the status of NAWIPS 5.6.b coming along? When do you expect to
> release it? I am anxious to say the least to try and see how the
> composited radar works and looks.  I was not able to figure out what it
> was you had me download last time (the examples you were creating of the
> composited radar) but I am willing to give it another try if you don't
> mind.  Oh...I just remembered one more question for you.....I believe
> the VAD wind profile is available from the NWS ftp server. However....on
> the few times that I have tried to download it and display it.....I got
> no image. Is there something special I need to do or manipulate to
> display that image?  I was wondering if it isn't displaying because it
> is a "different" type image than the plan view radar images.
>

I got 5.6c and 5.6.c.1 to add to 5.6.b, so I'm putting them all
in this release, instead of putting 5.6b out there and then
5.6c in a few weeks. Maybe in a week or so I'll have the release available
barring massive support load like I have had the past 2 months.

I put together a web page for gdradr at:
http://motherlode.ucar.edu/unidata/images/nids/gdradr.html


VAD is not the same type of product as the NIDS stuff. It is a set of drawing
commands rather than "data". GEMPAK doesn't support that product.

 
> I was able to save the radar data from EAX from yesterday's tornado in
> Warrensburg, MO. Pretty impressive storm. I also saved surface and upper
> air data and some satellite imagery from the storm. I am hoping to make
> a web page here about that in the near future. It was interesting to
> watch that storm form southwest of KC but then become tornadic as it
> encountered the warm front in the southern portions of the metro
> area...and stay tornadic across a good portion of Missouri as it rode
> along the warm front!
> 
> Thanks for your help Steve.....talk to you later.
> 
> KP
> 
> 

Steve Chiswell
Unidata User Support