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[LDM #WFA-344565]: N0R radar product feed

Hi Dave,

> I just received an E-mail from one of my downstream sites which said:
> "We noticed that N0R stopped flowing in the ldm NEXRAD3 data-feed.  This
> is also occurring with our secondary idd.aos.wisc.edu.  Before reaching
> out to the world, I wanted to check with you first.  We've noticed in
> the past that N0R will not be flowing through millersville and will be 
> flowing through wisconsin and vice versa."

I just checked, and there have been N0R products relayed in the IDD
today, but the only ones that I see are from the Pacific Region and
Puerto Rico.

I checked the availability of N0R products as follows:

<as 'ldm'>
notifyme -vl- -f ANY -p N0R -o 1000000 -h idd.unidata.ucar.edu

When you run this 'notifyme' invocation on your LDM machine, do
you see or not see a listing of products?

> Right now I am not getting N0R data from either idd or iddb, but other
> radar products are coming in.

We haven't seen N0R products from radars outside of the Pacific region
and Puerto Rico today.

> Did I miss an announcement on this product's availability or is
> something else going on?

I have not seen any announcement about N0R product distribution 
problems in NOAAPort.

Aside: I know that the NWS has been wanting to cease creation and
distribution of the N0R product for years.  I have to believe that
they would announce the cessation of the product's creation to the
community before summarily dropping it.

The other thing that may or may not be relevant is:  the NWS
issued a notice that it would be upgrading software today that
would affect the flow of NEXRAD Level II data.  Here is
the latest notice that we received:

Date:    Thu, 06 May 2021 12:02:51 -0500
Maintenance activity is complete.

Thank you.

address@hidden> wrote:

    Correction on the start time.  

    Start Time: 10:30 AM (Central Time) Thursday May 5th, 2021

    Sorry for any confusion.

    address@hidden> wrote:

        Radar Operations Center (ROC) will be performing software updates
        which will affect the data flow of the Level II Network TDS path. The
        activity is a software update on the National Level II (NL2) servers
        in Silver Spring, MD.

        Start Time: 9:00 AM (Central Time) Thursday May 5th, 2021
        Duration: 2 hours
        Event:  Software update (Silver Spring, MD)

        The activity will take about 2 hours to complete and will affect the
        Data flow of the “Silver Spring, MD TDS Level II Path” for up to 30
        minutes during that window.  The Data Path via Norman, OK/RDS NL2
        servers is not part of this activity. (No service interruption via RDS
        path is anticipated.)

        Please keep BOTH NL2 connections (Silver Spring & Norman) up to avoid
        data flow interruption.

        National Level II (NL2) status information via weather.gov is


        NEXRAD View - WSR-88D monitoring by site location
        SPG View - TDWR Status via the NWS SPG
        SERVER View - NL2 server & Network status (Shows site connectivity AND
        Silver Spring vs Norman Data flow)
        CONTROL View - Shows data latency for each NL2 server
        LDM View - Level II Data flow from site
        NPN View - Shows FSL2 data from the NOAA Profiler Network

        If there is any emergency associated with Level II data flow noted
        during this event, support can be reached at (405) 820-3646  or

        Thank you.

        William Greenwood

As you can see in this notice, there is no mention of N0R Level III

> What I find weird is that the product
> availability flip flops between us and Wisconsin.

I am not exactly sure what you mean by "flip flops between us and

What I can say is that the version of the LDM and NOAAPort ingest
code that is bundled with the LDM is the same on all of the machines
whose NOAAPort ingest output feeds into the IDD:


> Thanks for you help.

No worries.


Unidata User Support                                    UCAR Unidata Program
(303) 497-8642                                                 P.O. Box 3000
address@hidden                                   Boulder, CO 80307
Unidata HomePage                       http://www.unidata.ucar.edu

Ticket Details
Ticket ID: WFA-344565
Department: Support IDD
Priority: Normal
Status: Closed
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