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Service Change Notice 24-54 Updated
National Weather Service Headquarters Silver Spring MD
1200 PM EDT Tue Jul 9 2024

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

From: David Michaud, Director
 NWS Office of Central Processing

Subject: Updated: Change to NOAAPort / Satellite Broadcast
Network (SBN) Channel Alignment: Effective on or about August 5,
2024

Updated to change the implementation date from on or about 1200
Coordinated Universal Time (UTC) July 15, 2024, to on or about
1200 UTC August 5, 2024, and to add information on a recommended
configuration setting.

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.  The implementation date has
been delayed to allow users time to make these changes.  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].) (....) (..)(..)(..)

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 grib, grib2, and 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 on or around
August 5, 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
Service Change Notice (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