National Weather Service Raw Text Product

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Public Information Statement
National Weather Service Charleston SC
840 AM EDT Mon Apr 25 2022

To:  	Subscribers:
	-NOAA Weather Wire Service
	-Emergency Managers Weather Information Network
	-NOAAPort
	Other NWS Partners and NWS Employees

From: 	Kate Abshire, Acting Chief
	Marine, Tropical and Tsunami Services Branch

Subject: Tropical Cyclone Watch/Warning Product (TCV)
	 Collaboration Testing April 25-29, 2022

The National Weather Services (NWS), National Hurricane Center (NHC),
Weather Prediction Center (WPC), Ocean Prediction Center (OPC), and 
Weather Forecast Offices (WFOs) in the NWS Eastern and Southern Regions
will proceed with internal software and hardware testing of the National
Tropical Cyclone Watch/Warning (TCV) product collaboration process April
25-28, 2022. Test activities are expected to be conducted each day 
between 1600 UTC and 1900 UTC. Friday, April 29, 2022 is a designated
backup day.

The National TCV product contains a summary of collaborated wind and/or
storm surge watches and warnings, depicted by NWS-defined geographic zones.
Internal TCV test products are not intended to be released externally 
through NWS dissemination and communication systems. The text products
affected by collaboration testing are the National TCV products issued
under the following AWIPS Product Identifiers (PIL) and World Meteorological
Organization (WMO) Identifiers (ID):

TCV Product        	AWIPS PIL  WMO ID
------------        	---------  -------
Preliminary TCV      	PTCAT/1-5/ WTNT/81-85/ KNHC
National TCV        	TCVAT/1-5/ WTNT/81-85/ KNHC

In addition, the following National Digital Forecast Database (NDFD) 
elements will be created for this test:
	- Tropical cyclone wind probabilities (incremental and
	cumulative) for 34 kt, 50 kt, and 64 kt
	- Hazard grid (including tropical storm, hurricane, and
	storm surge hazards)

While unlikely, there is a slight chance that the tropical expressions of
uncertainty (i.e., Tropical Storm Conditions Likely, Hurricane Conditions
Possible) could unintentionally appear on weather.gov Point and Click 
forecast pages temporarily because this test includes the internal creation
of tropical wind speed probabilities.

The NWS will continue periodic internal tropical software testing during
the remainder of this hurricane season as needed.

For more information, please contact:

Steven Rowley
Science and Operations Officer
National Weather Service Charleston SC 29406
steven.rowley@noaa.gov
 843-744-1732
	
National Public Information Statements are online at:
 https://www.weather.gov/notification/  


$$