544  
NOUS41 KPHI 251451  
PNSPHI  
DEZ001>004-MDZ012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-060>062-070-  
071-101>106-220211-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ  
1050 AM EDT 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 25, 2024  
 
WEATHER FORECAST OFFICES (WFOS) IN THE NATIONAL WEATHER SERVICE  
(NWS) SOUTHERN AND EASTERN REGIONS WILL COMMENCE WITH HURRICANE  
THREATS AND IMPACTS (HTI) THREAT GRID MOSAIC TESTING ON THURSDAY,  
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 EASTERN REGION WFOS:  
HTTPS://WWW.WEATHER.GOV/WFO/TROPICAL#HTI  
 
NWS SOUTHERN REGION WFOS:  
HTTPS://WWW.WEATHER.GOV/SRH/TROPICAL?OFFICE=WFO#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:  
 
SARAH JOHNSON  
WARNING COORDINATION METEOROLOGIST  
NATIONAL WEATHER SERVICE OFFICE  
MOUNT HOLLY, NJ  
SARAH.JOHNSON@NOAA.GOV  
 
NATIONAL PUBLIC INFORMATION STATEMENTS ARE ONLINE AT:  
HTTPS://WWW.WEATHER.GOV/NOTIFICATION/  
 

 
 
MPS  
 
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