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[IDV #RWW-752224]: NARR forecast soundigns



Hi Mike,

Thanks for the good news.

Yes, getting the data via the catalog (i.e., THREDDS Server and OpenDAP) is
advantageous on account of "server-side" subsetting. Via THREDDS you only get
the data you interested in, subsetted in time and/or space, delivered to the IDV
instead of the entire data set which can be voluminous and unwieldy.

Best,

Unidata IDV Support

> Cool got it now.  The problem/difference was I was using the NARR files I 
> have downloaded already and not that xml link route.  Not sure what exactly 
> is different between them but when using my NARR files it's not an option.  
> But that's fine, I'll just use the link route to view the data and dump what 
> I downloaded.
> 
> 
> I was getting them from here.  
> http://www.ncdc.noaa.gov/has/HAS.FileAppRouter?datasetname=NARR&subqueryby=STATION&applname=&outdest=FILE
> 
> I then used the NOAA toolkit to untar the files which end up ending in 
> "awips". merged_AWIP32.1991042700  Like that.  I never even thought to try 
> the server route again.  And soon as I did, there it is.
> 
> 
> Thanks!
> 
> Mike
> 
> ________________________________
> From: Unidata IDV Support <address@hidden>
> Sent: Thursday, October 13, 2016 4:10:32 PM
> To: address@hidden
> Cc: address@hidden
> Subject: [IDV #RWW-752224]: NARR forecast soundigns
> 
> Hi Mike,
> 
> Once the plugin is installed (verify that it is actually installed), simply 
> plot
> your sounding via the Field Selector, "Derived" node.
> 
> See the attached image which should make things obvious, hopefully.
> 
> If you don't see it, it either means the plugin was not installed or it is not
> recognizing the data you are pointing to. In the latter case, please point me
> to the *specific* dataset you are looking at.
> 
> Best,
> 
> Unidata IDV Support
> 
> 
> > I got this jar plugin installed for the NARR sounding option.  Thanks 
> > again.  I'm at a loss on where to access the use of it.  On ruc/rap it was 
> > the option under 3d/temp....sounding was just a display option.  I've 
> > looked everywhere for a means to use the plug-in for the soundign but am 
> > missing a last step I guess.  It is installed though as I can see its 
> > contents in the plug-in manager.  Should this plug in be adding an option 
> > in the field selector for fields on an opened NARR file?  Or in the 
> > forumulas area in data sources.  There must be some other means to get to 
> > this end but the only thing I'd really done previously was click temps 
> > under 3d grid and then chose sounding display.  I think I've clicked on 
> > every field option looking for sounding but haven't found one to work.  I'm 
> > guessing it should be something simple.
> >
> >
> > Thanks,
> >
> > Mike
> >
> > ________________________________
> > From: Unidata IDV Support <address@hidden>
> > Sent: Friday, September 30, 2016 2:27:41 PM
> > To: address@hidden
> > Cc: address@hidden
> > Subject: [IDV #RWW-752224]: NARR forecast soundigns
> >
> > Hi Mike,
> >
> > For the sounding plot, yes, I believe this is possible, but since you did 
> > not
> > point us to a specific data set, I just picked one of the NARR-A datasets
> > (http://www.ncdc.noaa.gov/data-access/model-data/model-datasets/north-american-regional-reanalysis-narr)
> > and I accessed it from a THREDDS server rather than downloading it. For 
> > example,
> >
> > http://nomads.ncdc.noaa.gov/thredds/narr/narr-a.xml
> >
> > The issue here is that you have to work with the specific humidity (rather 
> > than
> > relative humidity, dew point, mixing ratio, etc.). But no problem, IDV to 
> > the
> > rescue. You have to set up one or more IDV derived formulas, coupled with a 
> > Java
> > method DerivedGridFactory.createRelativeHumidity
> > (https://www.unidata.ucar.edu/software/idv/docs/javadoc/ucar/unidata/data/grid/DerivedGridFactory.html#createRelativeHumidity-visad.FieldImpl-visad.FieldImpl-boolean-)
> > accessed via a Jython function. This is very tricky business even for me, 
> > so I
> > simply did it for you in the attached jar plugin file.
> >
> > You need to install the plugin via the Tools --> Plugin Manager. Go to File 
> > ->
> > Install Plugin From File.
> >
> > The plugin has three files:
> >
> > - aliases.xml which contains a Specific_humidity to mixing ratio alias. 
> > (This makes sense when you use the Java method described earlier with the 
> > isSpecificHumidity boolean flag)
> > - derived.xml which contains three derivation formulas for the relative 
> > humidity, dew point, and sounding.
> > - default.py which contains a Jython function that invokes the Java method 
> > above
> >
> > You can now plot the sounding along with dew point and relative humidity 
> > derivations.
> >
> > As for the surface elevation issue, I am not sure about this one. If you can
> > find a field that will mask out the temperature, specific humidity, and 
> > winds
> > below the surface then that might be an avenue of pursuit.
> >
> > Best
> >
> > Unidata IDV Support
> >
> > > http://www.ncdc.noaa.gov/has/has.dsselect
> > >
> > >
> > > It's just the files under models, North American Regional Reanalysis.  
> > > They don't end in grb2 like the rap or ruc files once untarred.  They 
> > > have awips in their file name, but not sure how exactly they are 
> > > different when untarred and what they are just that they don't say .grb2 
> > > .  They open like the others for the most part but at least the sounding 
> > > option doesn't seem to be there.
> > >
> > >
> > > Otherwise as far as the height thing was concerned that was just the 
> > > bottom/ground of the sounding starting at I guess sea level on the graph 
> > > and not adjusting like if you were plotting from the high plains 
> > > somewhere.  Doesn't affect the hodo as it just uses the same flow "below 
> > > ground" as the surface flow but looks odd when displaying the sounding.  
> > > Maybe there's some way in a setting to have it do so but maybe not.  I'm 
> > > guessing there's some reason there's no sounding route in those NARR 
> > > files.  I've looked and looked through all the drop downs a couple times 
> > > and don't think I've missed it that way.
> > >
> > >
> > > Thanks,
> > >
> > > Mike
> > >
> > > ________________________________
> > > From: Unidata IDV Support <address@hidden>
> > > Sent: Thursday, September 29, 2016 7:46:20 AM
> > > To: address@hidden
> > > Cc: address@hidden
> > > Subject: [IDV #RWW-752224]: NARR forecast soundigns
> > >
> > > Mike,
> > >
> > > Could you point us to a sample of the data you are referring to?
> > >
> > > Best,
> > >
> > > Unidata IDV Support
> > >
> > >
> > > > Just 2 quick questions.  I've located where to pull forecast soundings
> > > > from archived ruc and rap models(3d, temp, derived, sounding data)...but
> > > > I've looked everywhere with open NARR files and am now under the
> > > > assumption it's not possible.  Just thought I'd ask real quick to be 
> > > > sure .
> > > >
> > > > Also I see the soundings from the others are plotted without adjusting
> > > > for elevation at the bottom of the sounding.    Is there any way to
> > > > change that?  For a visual sake. I'm thinking probably not but figured
> > > > I'd ask that real quick too.
> > > >
> > > > Thanks,
> > > >
> > > > Mike
> > > >
> > > >
> > >
> > >
> > > Ticket Details
> > > ===================
> > > Ticket ID: RWW-752224
> > > Department: Support IDV
> > > Priority: Normal
> > > Status: Closed
> > > ===================
> > > NOTE: All email exchanges with Unidata User Support are recorded in the 
> > > Unidata inquiry tracking system and then made publicly available through 
> > > the web.  If you do not want to have your interactions made available in 
> > > this way, you must let us know in each email you send to us.
> > >
> > >
> > >
> > >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: RWW-752224
> > Department: Support IDV
> > Priority: Normal
> > Status: Closed
> > ===================
> > NOTE: All email exchanges with Unidata User Support are recorded in the 
> > Unidata inquiry tracking system and then made publicly available through 
> > the web.  If you do not want to have your interactions made available in 
> > this way, you must let us know in each email you send to us.
> >
> >
> 
> 
> Ticket Details
> ===================
> Ticket ID: RWW-752224
> Department: Support IDV
> Priority: Normal
> Status: Closed
> ===================
> NOTE: All email exchanges with Unidata User Support are recorded in the 
> Unidata inquiry tracking system and then made publicly available through the 
> web.  If you do not want to have your interactions made available in this 
> way, you must let us know in each email you send to us.
> 
> 


Ticket Details
===================
Ticket ID: RWW-752224
Department: Support IDV
Priority: Normal
Status: Closed
===================
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata 
inquiry tracking system and then made publicly available through the web.  If 
you do not want to have your interactions made available in this way, you must 
let us know in each email you send to us.



NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.