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Public Information Statement
National Weather Service Lake Charles LA
224 PM CDT Wed Apr 7 2021


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:

 Andrew Patrick, MIC
   National Weather Service Office Lake Charles LA 70607
   andy.patrick@noaa.gov
   337-477-5285

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

$$