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000
NOUS41 KWBC 111350
PNSWSH

Public Information Statement 24-25
National Weather Service Headquarters Silver Spring MD
950 PM EDT Thu Apr 11 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 and 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 Schauer
 National Tropical Services Program Manager
 Miami, FL
 Tropical.Program@noaa.gov

National Public Information Statements are online at:

https://www.weather.gov/notification/