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Public Information Statement
National Weather Service Peachtree City GA
342 PM EDT Wed Apr 7 2021


...PUBLIC INFORMATION STATEMENT...

To:        Subscribers:
           -NOAA Weather Wire Service
           -Emergency Managers Weather Information Network
           -NOAAPort
           Other NWS Partners and NWS Employees
 
From:      Allison Allen, Chief
           Marine, Tropical and Tsunami Services Branch 
        
Subject:   Hurricane Threats and Impacts (HTI) Mosaic Testing on 
           April 8, 2021 (Backup date: April 22, 2021)
 
The NWS Weather Forecast Office (WFO) in Honolulu and WFOs in the
NWS Southern Region and in the NWS Eastern Region will commence 
with Hurricane Threats and Impacts (HTI) threat grid mosaic 
testing on Thursday, April 8. Thursday, April 22 has been 
designated as the backup test date in the event that testing 
cannot be conducted on April 8. 

Testing will begin at approximately 1500 UTC. Test activities 
will take approximately 1 hour; however, NWS dissemination systems
may take up to an hour and a half to purge all test data. All 
test data is expected to be cleared by 1730 UTC. 

For the test, HTI grids will be created for Hurricane Wind 
Threat, Hurricane Storm Surge Threat, Hurricane Flooding Rain 
Threat, and Hurricane Tornado Threat. These grids are sent to the 
National Digital Forecast Database (NDFD) and can be seen on the 
NDFD web viewer at:
https://digital.weather.gov 

The Product Description Document for these threat grids can be 
found here:
https://www.weather.gov/media/srh/tropical/PDD_HTI.pdf 

HTI grids are created by WFOs for their county warning area and 
mosaicked together to form a more geographically consistent 
depiction of the threat posed by hurricane hazards. The HTI 
mosaics can be found in kml format at:
https://weather.gov/hti 

When populated HTI grids are posted, they also can be found on 
the WFO Tropical Web Portal page linked below under the “Threats
and Impacts” tab:
https://www.weather.gov/srh/tropical

Periodic software and hardware testing in preparation for 
tropical cyclone events will continue during the remainder of 
2021.

For more information, please contact:

Sid King
Tropical Program Manager
National Weather Service Office
Peachtree City, GA, 30269
sidney.king@noaa.gov
770-486-1133 (press 4)

National Public Information Statements are online at: 
https://www.weather.gov/notification/ 


$$