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Public Information Statement
Issued by NWS Mobile, AL

000
NOUS44 KMOB 251344
PNSMOB
ALZ051>060-261>266-FLZ201>206-MSZ067-075-076-078-079-260145-

Public Information Statement
National Weather Service Mobile AL
844 AM CDT Thu Apr 25 2024

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

From: Greg Schoor, Chief Marine, Tropical and Tsunami Services
Branch

Subject: Hurricane Threats and Impacts (HTI) Mosaic Testing on
April 11, 2024 (Backup date: April 25, 2024)

The National Weather Service (NWS) Weather Forecast Offices
(WFOs) in Honolulu, San Juan, San Diego, and Los Angeles along
with WFOs in the NWS Southern Region west of the Mississippi River
will commence with Hurricane Threats and Impacts (HTI) threat
grid mosaic testing on Thursday, April 11. A second test that will
include WFOs east of the Mississippi River is planned for April
25.

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, Storm Surge Threat, Flooding Rain Threat, and Tornado
Threat at each participating WFO. Those grids are stitched
together into storm-scale HTI graphics. The HTI Mosaic graphics
are available in Keyhole Markup Language (KML) format on the
following webpage:
https://www.weather.gov/hti

The mosaics are also available through the National Digital
Forecast Database and on web pages hosted by the Weather Forecast
Offices (WFOs) affected by the tropical cyclone. These webpages
use the following URL format, where “wfo” should be replaced with
the 3 digit identifier for the WFO of interest:

NWS Southern and Western Region (San Diego and Los Angeles) WFOs:

https://www.weather.gov/srh/tropical?office=wfo#hti

WFO Honolulu:
https://www.weather.gov/hfo/hti

More details on HTI can be found in the Product Description
Document:
https://www.weather.gov/media/srh/tropical/PDD_HTI.pdf

Periodic software and hardware testing in preparation for
tropical cyclone events will continue during the remainder of
2024.

For more information, please contact:

 Jessica Chace
 Warning Coordination Meteorologist
 National Weather Service Office
 Mobile, AL
 Jessica.Chace@noaa.gov

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

NNNN

$$