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Service Change Notice 24-54 Updated
National Weather Service Headquarters Silver Spring MD
1110 AM EDT Mon Sep 9 2024

To: Subscribers:
 -NOAA Weather Wire Service (NWWS)
 -Emergency Managers Weather Information Network (EMWIN)
 -NOAAPort
 Other NWS Partners, Users and Employees

From: Tim Greten
 Director, NWS Office of Central Processing

Subject: Updated: Change to NOAAPort / Satellite Broadcast
Network (SBN) Channel Alignment: Effective on or about September
16, 2024

Updated to change effective date.  Due to current tropical
activity in the Gulf of Mexico that will persist through much of
this week, this action has been rescheduled to on or about 1200
Coordinated Universal Time (UTC) September 16, 2024.

The NWS recommends that all users ensure their requests from
NOAAPort / SBN utilize the feed type of ANY rather than specific
feed types such as HDS and NGRID.  After this change, patterns
could be duplicated so users should cross-check and make sure
there are no duplicates.

An example of a request to change is for contiguous U.S. (CONUS)
Model Output Statistics (MOS) products:

Before:

NGRID|IDS|DDPLUS     ^(FOUS[1-589].) (....) (..)(..)(..)

After:

ANY^(FOUS[1-589].) (....) (..)(..)(..)

From the original Service Change Notice (SCN) 24-54:
The NWS has studied the existing NOAAPort/SBN/NWWS channel
alignment, bandwidth usage, prioritization, and delay times.
This study identified that reorganizing the data on the various
channels will improve the timeliness of distributed products.

The first of three changes to the existing NOAAPort/SBN/NWWS
channels is to migrate all gridded binary (grib), grib2, and
Binary Universal Form for the Representation of Meteorological
Data (bufr) formatted data from the NMC channel to the NMC2
channel.

The following is a list of World Meteorological Organization
(WMO) Headers that will move: (Channel: NMC | Priority: 0 |
Bandwidth: 20 | Port: 1201 | PID: 101) to (Channel: NMC2 |
Priority: 5 | Bandwidth: 30 | Port: 1203 | PID: 103):

^(AT....) ^(DT....) ^(ES....) ^(FT....) ^(GT....) ^(HH....)
^(HR....) ^(HT....) ^(HU....) ^(HV....) ^(IU....) ^(JS....)
^(JU....) ^(LA....) ^(LE....) ^(LH....) ^(LP....) ^(LR....)
^(LT....) ^(LU....) ^(LV....) ^(MA....) ^(ME....) ^(ME....)
^(MH....) ^(MP....) ^(MP....) ^(MR....) ^(OE....) ^(PE....)
^(RD....) ^(RE....) ^(RH....) ^(SL....) ^(SV....) ^(YA....)
^(YB....) ^(YC....) ^(YD....) ^(YE....) ^(YF....) ^(YG....)
^(YH....) ^(YI....) ^(YJ....) ^(YK....) ^(YL....) ^(YM....)
^(YN....) ^(YO....) ^(YP....) ^(YQ....) ^(YR....) ^(YS....)
^(YT....) ^(YU....) ^(YV....) ^(YW....) ^(YX....) ^(YY....)
^(YZ....) ^(ZA....) ^(ZB....) ^(ZC....) ^(ZD....) ^(ZE....)
^(ZF....) ^(ZG....) ^(ZH....) ^(ZO....) ^(ZP....) ^(ZQ....)
^(ZR....) ^(ZS....) ^(ZT....) ^(ZU....) ^(ZV....) ^(ZW....)
^(ZX....) ^(ZY....) ^(ZZ....)

This data is expected to move on or about 1200 UTC September 16,
2024.  If a Critical Weather Day has been issued, this change
will be postponed until 1200 UTC on the next non-Critical
Weather Day.

No change is expected to the data feed at the receiver.  If no
issues are experienced, the configuration will remain in place.
If any issues are identified, the changes will be evaluated, and
a new implementation date will be determined.

We encourage all NOAAPort/SBN/NWWS users to closely monitor this
SCN during the transition period for updated information.  If
you have any questions or concerns, please contact the focal
points below:

Paul Kirkwood
NOAA/NWS Southern Region Headquarters
Email: paul.kirkwood@noaa.gov

Andy Just
NOAA/NWS Office of Central Processing
Email: andy.just@noaa.gov

James Glenn
NOAA/NWS Office of Central Processing
Email: james.glenn@noaa.gov

National Service Change Notices are online at:

https://www.weather.gov/notification