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661 

NOHW40 PHFO 220111

PNSHFO

HIZ001-003-004-006-007-009>011-015>018-022-023-026>054-250400-



Public Information Statement

National Weather Service Honolulu HI

311 PM HST Mon Apr 21 2025



...ANTICIPATED OUTAGE OF SOME PRODUCTS AND SERVICES DUE TO 

A MAJOR SOFTWARE UPDATE THIS WEEK...



A significant software update at the NWS Weather Forecast Office

in Honolulu (HFO) will take place from Tuesday April 22nd through

Thursday April 24 2025 that will result in an extended outage of 

the operational forecast system. The majority of analysis and 

forecast products, including all watches, warnings, and 

advisories, will be provided by designated service backup 

offices. However, there will still be a variety of impacts and 

outages. HFO plans to resume normal forecast operations by the 

evening of Thursday April 24th.



Known impacts include: 



1) All NOAA Weather Radio (NWR) transmitters in Hawaii will be

unavailable. The transmitters affected are:



WZ2557 Lihue on 162.450 Mhz

WWG74 Kokee on 162.400 MHz 

KBA99 Mt Kaala on 162.550  

WWF39 Hawaii Kai on 162.450 MHz

WWG75 Haleakala on 162.400 MHz 

WWG27 South Point on 162.550 MHz 

WWG76 Kulani Cone on 162.550 MHz

WZ2540 North Kohala on 162.500 MHz



Please note that NWR is the only method for the National Weather 

Service to activate the Emergency Alert System (EAS) for weather- 

related watches and warnings. If there is a weather-related 

warning issued while NWR is down, Hawaii Emergency Management 

Agency will activate EAS using the Civil Emergency Message event 

code. Wireless Emergency Alerts (WEA) that are sent to cell phones

will not be affected and will continue to operate as normal.



2) Text products likely to be impacted include the Hourly 

One-Hourly Rainfall Summary (RR5HFO), the Hawaii Rainfall Summary 

(RRAHFO), the Weather Roundup for Hawaii (RWRHI), Surf Reports

(OMRHFO), the Daily Climate Reports (e.g., CLIHNL), and Monthly 

Summaries (e.g., CF6HNL). 



3) Many enhanced products on the HFO web site (weather.gov/hawaii)

will not be available, such as embedded sections from the Area 

Forecast Discussion or island-based segments of the Statewide 

Surf Forecast. Instead, these products will be available in a 

plain text format.



4) Several graphical products on the HFO website and the marine 

weather fax will not be available, including 24, 48, and 72 hour 

surface forecast and wind/wave charts.



If you have any questions about this outage, please contact:



John Bravender

Warning Coordination Meteorologist

john.bravender@noaa.gov

808-973-5275



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