akrherz
commented
2 years ago We now have SCN 22-81 and this PDF details which appears to match the above.
```
NOUS41 KWBC 241540
PNSWSH
Service Change Notice 22-81
National Weather Service Headquarters Silver Spring MD
1140 AM EDT Wed Aug 24 2022
To: Subscribers:
-NOAA Weather Wire Service
-Emergency Managers Weather Information Network
-NOAAPort
Other NWS Partners and Employees
From: Daniel Roman, Acting Chief
Severe, Fire, Public and Winter Weather Services Branch
Subject: Implementation of Impact-Based Warning Tags for Snow Squall
Warnings and Changes to Wireless Emergency Alerts for Snow
Squall
Warnings, Effective on or after November 7, 2022
The NWS will phase in the implementation of Impact-Based Warning
(IBW)
tags for Snow Squall Warnings (SQWs) beginning on or after November
7,
2022. IBW tags are machine-readable tags that will be appended to the
bottom of World Meteorological Office (WMO)-formatted SQW text
products
and will be used to characterize the snow squall impact and source
information. The IBW tags will also be added as parameters in Common
Alert
Protocol (CAP) formatted Snow Squall Warning messages.
All NWS Weather Forecast Offices (WFOs) will transition to issuing
SQWs
with IBW tags by late February 2023.
Currently, Wireless Emergency Alerts (WEAs) are issued for all
SQWs. Once the IBW tags are implemented at the issuing WFO, WEAs will
be
limited to only those SQWs with the Snow Squall Impact tag of
“Significant.” With this change, the NWS is aiming to improve the
public
response to SQWs by issuing WEAs only for snow squall events that
pose a
substantial threat to safe travel.
There will be no change to the information included in the SQW
segment
header block, including the Valid Time Event Code (VTEC) strings, nor
will
there be a change to the criteria for warning dissemination through
other
systems (e.g., NOAA Weather Radio).
WEA is a joint effort between the Federal Communications Commission
(FCC),
the Federal Emergency Management Agency (FEMA), and the wireless
industry
that allows emergency alerting authorities to geographically target
emergency messages to mobile devices, primarily cell phones. The NWS
provides messages to WEA for hazards believed to be life-threatening
and
that have consequences that can be mitigated or minimized by
immediate
action. More information about WEA can be found at:
https://www.weather.gov/wrn/wea
The characterization of the snow squall impact and source
information,
along with examples of SQWs with IBW tags, are contained in the
Product
Description Document (PDD) link below:
https://nws.weather.gov/products/PDD/PDD_OplIBWTagsforSnowSquallWarnings_2022.pdf
For more information, please email:
michael.muccilli@noaa.gov
National Service Change Notices are online at:
https://www.weather.gov/notification/
```
PDD
generally like so
At some point, we need to reconsidering the database storage of these as we don't want too much column sprawl.