Snowfall Totals Across the Region

Snowfall Map for Northeast Georgia and the Western Carolinas

Snowfall Totals

    
                        

721

NOUS42 KGSP 232155

PNSGSP

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-

068>072-082-501>510-SCZ008>014-019-101>109-241000-



Public Information Statement

National Weather Service Greenville-Spartanburg SC

555 PM EDT Wed Apr 23 2025



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 24, 2025 (backup date: April 29, 2025)





The National Weather Service (NWS) Weather Forecast Offices (WFOs)

in Honolulu, Hawaii, San Juan, Puerto Rico, and all WFOs in the

contiguous United States that can issue tropical storm and hurricane

hazards will commence with Hurricane Threats and Impacts (HTI)

threat grid mosaic testing on Thursday, April 24, 2025. 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.



In the event that the commencement date is declared a Critical

Weather Day (CWD), an Enhanced Caution Event, or other event is

occurring or is anticipated to occur, the testing will commence at

the affected offices on April 29, 2025.



For the test, HTI grids will be created for hurricane Wind Threat,

Flooding Rain Threat, Tornado Threat, and Storm Surge Threat

(where applicable) 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 tropical cyclones. These webpages

include WFO Tropical Webpages and Graphical Hazardous Weather

Outlook (GHWO) Webpages.



GHWO Webpages use the following URL format, where XXX should be

replaced with the 3-letter identifier for the WFO of interest

(note that WFO Honolulu does not have a GHWO webpage):

https://www.weather.gov/erh/ghwo?wfo=XXX



WFO 3-letter identifiers and the respective NWS Region that each

WFO belongs to is listed at the following page:

https://www.weather.gov/pimar/CWAbyWFO



NWS Eastern, Southern, and Western Region WFO Tropical Webpages

use the following URL format, where XXX should be replaced with

the 3 letter identifier for the WFO of interest:



NWS Eastern Region WFOs:

https://www.weather.gov/XXX/tropical#hti



NWS Southern Region and Western Region WFOs:

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



The Tropical Webpage for WFO Honolulu can be found at:

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



User information about HTI can be found here:

https://www.weather.gov/media/srh/tropical/HTI_Explanation.pdf



More specific 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 2025.



For more information, please contact:

Stephen Wilkinson

Meteorologist in Charge

National Weather Service Office

Greenville/Spartanburg, SC

stephen.wilkinson@noaa.gov



National Public Information Statements are online at:

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



$$