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NOUS41 KWBC 011315
PNSWSH

Service Change Notice 25-59
National Weather Service Headquarters Silver Spring MD
915 AM EDT Fri Aug 1 2025

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

From: Timothy Greten
 Director, NWS Office of Central Processing

Subject: Change to NOAAPort / Satellite Broadcast Network (SBN)
Channel Alignment: Effective August 19, 2025

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 would improve the timeliness of distributed products.
The changes were divided into three phases.

The previous two changes were implemented:

 Phase 1: migrating all grib, grib2, and bufr formatted data
from the NMC channel to the NMC2 channel per this SCN:
https://www.weather.gov/media/notification/pdf_2023_24/scn24-
54_channel_realignment_to_SBN_aaf.pdf

 Phase 2: placing Canadian Radar data on the SBN per this SCN:
https://www.weather.gov/media/notification/pdf_2023_24/scn24-
100_channel_realignment_to_SBN_2.pdf

The final change, phase 3, will realign some of the SBN channels
and the data on them:

 1) Move the priority of channel EXP up to #1 (2nd Highest)
See the table farther below for the changes to the channels

 2) Move all Radar related data on the SBN to the EXP channel.
    This includes the following on the NMC channel:
    WSR88D/TDWR Radar:
    NXUS6[1-6] K* NXUS6[0789] P*
    SDUS2[1-6] K* SDUS2[1-6] P* SDUS2[0789] P*
    SDUS3[1-6] K* SDUS3[1-6] P* SDUS3[0789] P*
    SDUS5[1-6] K* SDUS5[1-6] P* SDUS5[0789] P*
    SDUS6[1-6] K* SDUS6[1-6] P* SDUS6[0789] P*
    SDUS7[1-6] K* SDUS7[1-6] P* SDUS7[0789] P*
    SDUS8[1-6] K* SDUS8[1-6] P* SDUS8[0789] P*

    Canadian Radar:
    SDCN01 CWAO

    Caribbean Radar:
    PAHM44 *

 3) MRMS data on the NMC2 channel to the EXP Channel
    CONUS:
    YAUC01 KWNR YAUE01 KWNR YAUE04 KWNR YAUE06 KWNR YAUE09 KWNR
    YAUE10 KWNR YAUF01 KWNR YAUP01 KWNR YAUP02 KWNR YAUP03 KWNR
    YAUP04 KWNR YAUP06 KWNR YAUQ01 KWNR YAUS04 KWNR YAUS06 KWNR
    YAUS09 KWNR YAUS10 KWNR YAUS11 KWNR YAUS15 KWNR YAUS16 KWNR
    YAUS22 KWNR

    ALASKA:
    YAAC01 KWNR YAAP02 KWNR YAAP03 KWNR YAAP04 KWNR YAAP06 KWNR

    HAWAII:
    YAHP02 KWNR YAHP03 KWNR YAHP04 KWNR YAHP06 KWNR

 4) Probabilistic Storm Surge (P-Surge) data on the NMC2
    channel to the NMC Channel:
    YA[B-P][A-F][0-2][0-9] KWEV
    YC[A-K][A-F][0-2][0-9] KWEV
    YD[A-K][A-F][0-2][0-9] KWEV
    YE[A-E,I][A-F][0-2][0-9] KWEV
    YG[A-E,I][A-F][0-2][0-9] KWEV
    YH[A-E,I][A-F][0-2][0-9] KWEV

 5) Move all data previously on EXP and GOES channels to NMC3
    IXTA89 KNES IXTA99 KNES IXTB89 KNES IXTB99 KNES IXTC89 KNES
    IXTC99 KNES IXTD89 KNES IXTD99 KNES IXTF89 KNES IXTF99 KNES
    IXTG89 KNES IXTG99 KNES IXTH89 KNES IXTH99 KNES IXTI89 KNES
    IXTI99 KNES IXTJ89 KNES IXTJ99 KNES IXTK89 KNES IXTK99 KNES
    IXTL89 KNES IXTL99 KNES IXTM89 KNES IXTM99 KNES IXTN89 KNES
    IXTN99 KNES IXTO89 KNES IXTO99 KNES IXTP89 KNES IXTP99 KNES
    IXTQ89 KNES IXTQ99 KNES IXTR89 KNES IXTR99 KNES IXTT89 KNES
    IXTT99 KNES IXTU89 KNES IXTW01 KNES IXTW81 KNES IXTX01 KNES
    IXTX81 KNES IXTY01 KNES IXTY81 KNES

 6) Lower the priority of the GOES channel and reallocate the
    bandwidth to the EXP / Radar channel


Migration of this data requires changing the bandwidth available
for a few channels. The table below summarizes the changes to
channel priority and bandwidth. This information can also be
found on the NOAAPort page:  (https://www.weather.gov/noaaport/)

Current:
============================================
Channel      | Pri | Bandwidth | Port | PID
============================================
NMC     |0  |  20 Mbps  | 1201 | 101
GOES     |1  | 3.5 Mbps  | 1202 | 102
GRW     |2  |  15 Mbps  | 1209 | 107
GRE     |3  |  15 Mbps  | 1210 | 108
ADD (NBM)    |4  |  30 Mbps  | 1206 | 151
NMC2     |5  |  30 Mbps  | 1203 | 103
NOAAPORT_OPT |6  |   2 Mbps  | 1204 | 104
NMC3     |7  |   6 Mbps  | 1205 | 105
EXP     |8  |  10 Mbps  | 1208 | 106
ENC     |9  |   0 Mbps  | 1207 | 150
NWWS     | N/A | 750 Kbps  | 1201 | 201
============================================

New:
============================================
Channel      | Pri | Bandwidth | Port | PID
============================================
NMC     |0  |  15 Mbps  | 1201 | 101
EXP (RDR)    |1  |  35 Mbps  | 1208 | 106
GRW     |2  |  15 Mbps  | 1209 | 107
GRE     |3  |  15 Mbps  | 1210 | 108
ADD (NBM)    |4  |  30 Mbps  | 1206 | 151
NMC2     |5  |  30 Mbps  | 1203 | 103
NOAAPORT_OPT |6  |   5 Mbps  | 1204 | 104
NMC3     |7  |  10 Mbps  | 1205 | 105
ENC     |8  |   0 Mbps  | 1207 | 150
GOES     |9  |   0 Mbps  | 1202 | 102
NWWS     | N/A | 750 Kbps  | 1201 | 201
============================================

This data is expected to move on or about 1400 Coordinated
Universal Time (UTC) August 19, 2025.  If a Critical Weather Day
has been issued, this change will be postponed until 1400 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