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Service Change Notice 24-54
National Weather Service Headquarters Silver Spring MD
1230 PM EDT Fri May 17 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: Change to NOAAPort / Satellite Broadcast Network (SBN)
Channel
 Alignment, Effective June 10, 2024

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 Coordinated Universal
Time
(UTC) June 10, 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