NOHW40 PHFO 181626
PNSHFO
HIZ001-003-004-006-007-009>011-015>018-022-023-026>054-190430-

Public Information Statement
National Weather Service Honolulu HI
626 AM HST Mon May 18 2026

To:      Subscribers:
         -NOAA Weather Wire Service
         -Emergency Managers Weather Information Network
         -NOAAPort
         Other NWS Partners and NWS Employees
 
From:    Jamie Rhome, Deputy Director
         National Hurricane Center
        
Subject: Tropical Collaboration Testing May 18
 
The NWS National Hurricane Center (NHC) and Weather Forecast 
Office Honolulu (HFO) will perform internal tropical collaboration
testing on May 18, 2026. 

This internal testing will begin daily at approximately 1500 UTC 
and terminate at 2100 UTC. 

The testing will include the exchange of Tropical Storm, 
Hurricane, and Storm Surge Watches/Warnings between NHC and WFO 
HFO, generation of the local WFO HFO Tropical Cyclone 
Watch/Warning (TCV), generation of p-surge data, and the addition 
of tropical cyclone information into National Digital Forecast 
Database (NDFD) elements.

Internal tropical watches and warnings, TCV test products and 
NDFD elements are not intended to be released externally through 
NWS dissemination and communication systems. Any TCV products that
are inadvertently released during the testing period are solely 
for testing purposes and do not represent current or forecast 
weather conditions.

The text product affected by collaboration testing is the Local 
HFO Tropical Cyclone Watch/Warning (TCV) product issued under the 
following AWIPS Product Identifiers (PIL) and World Meteorological
Organization (WMO) Identifiers (ID):

TCV Product            AWIPS PIL   WMO ID
------------           ---------   -------
Local HFO TCV          TCVHFO      WTHW80 PHFO

The local HFO TCV product contains HFO tropical wind and/or storm
surge watches and warnings, depicted by NWS-defined geographic 
zones. This product is used to alert Wireless Emergency Alerts 
(WEA) for the Hurricane and Storm Surge Warnings. Since products 
are not intended to be released publicly, no WEAs are expected.

In addition, the following NDFD elements will be created for this test:
     - Hazard grid (including tropical storm, hurricane, and 
       storm surge hazards) 

P-surge guidance will be run during the test and the test data 
will be available publicly at the following URL:
https://slosh.nws.noaa.gov/psurge/

The NWS will continue periodic internal tropical software testing during the remainder of 2026. 

For more information, please contact:
 
Chris Brenchley
Meteorologist in Charge 
National Weather Service Office Honolulu, Hawaii 
christopher.brenchley@noaa.gov
	 
National Public Information Statements are online at:
https://www.weather.gov/notification/ 
 
NNNN


$$