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Public Information Statement
National Weather Service San Diego CA
632 AM PDT 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/

$$