http://www.weather.gov/hawaii NWS WFO Honolulu, HI - Public Information Statement for Hawaii none en-us W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) 29 Apr 2026 07:45:00 GMT 29 Apr 2026 07:45:00 GMT http://weather.gov/images/xml_logo.gif NOAA and NWS logos 80 41 http://www.weather.gov/hawaii http://www.weather.gov/hfo/pns#.2604291745 NOHW40 PHFO 291745 PNSHFO HIZ001-003-004-006-007-009>011-015>018-022-023-026>054-300545- Public Information Statement National Weather Service Honolulu HI 745 AM HST Wed Apr 29 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 April 28 and 29 (Backup Date April 30 and May 19-21) The NWS National Hurricane Center (NHC) and select Weather Forecast Offices (WFOs) in the NWS Eastern, Southern, and Pacific Regions will perform internal tropical collaboration testing April 28 and 29, 2026. If testing is unable to be conducted these days, testing will instead be conducted April 30 or May 19-21, 2026. WFOs participating in the test include the following: - Charleston, SC (CHS) - Honolulu, HI (HFO) - Lake Charles, LA (LCH) - Mobile, AL (MOB) - Morehead City, NC (MHX) - New Orleans, LA (LIX) - Wakefield, VA (AKQ) - Wilmington, NC (ILM) This internal testing will begin daily at approximately 1400 UTC and terminate at 2000 UTC. The testing will include the exchange of tropical watches and warnings between NHC and the testing WFOs, generation of the National Tropical Cyclone Watch/Warning (TCV) product, generation of P-surge data, and the addition of tropical cyclone information into National Digital Forecast Database (NDFD) elements. Internal 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 National 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 ------------ --------- ------- Atlantic National TCV TCVAT/1-5/ WTNT/81-85/ KNHC Note: A National TCV is not issued for the Central Pacific/HFO. The national TCV product contains a summary of collaborated wind and/or storm surge watches and warnings, depicted by NWS-defined geographic zones. In addition, the following NDFD elements will be created for this test: - Tropical cyclone wind probabilities (incremental and cumulative) for 34 kt, 50 kt, and 64 kt - Hazard grid (including tropical storm, hurricane, and storm surge hazards) - Wind and wind gust grids with tropical cyclone strength winds 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 $$ ]]> forecast 29 Apr 2026 17:45:00 GMT http://www.weather.gov/hfo/pns#.2604291745 W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) http://www.weather.gov/hfo/pns#.2604220820 NOHW40 PHFO 220820 PNSHFO HIZ006-007-009>011-032>036-221600- Public Information Statement National Weather Service Honolulu HI 1020 PM HST Tue Apr 21 2026 ...NOAA WEATHER RADIO OUTAGE EARLY WEDNESDAY MORNING FOR KBA99 MT KAALA... Maintenance being performed at Mt Kaala will disrupt the NOAA Weather Radio transmision from midnight until 5am Wednesday morning. The Mt Kaala transmitter serves the island of Oahu and broadcasts on a frequency of 162.550 MHz. $$ ]]> forecast 22 Apr 2026 08:20:00 GMT http://www.weather.gov/hfo/pns#.2604220820 W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) http://www.weather.gov/hfo/pns#.2604211614 NOHW40 PHFO 211614 PNSHFO HIZ001-003-004-006-007-009>011-015>018-022-023-026>054-220415- Public Information Statement National Weather Service Honolulu HI 614 AM HST Tue Apr 21 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: Hurricane Threats and Impacts (HTI) Mosaic Testing on April 21, 2026 (backup date: April 23, 2026) 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 Tuesday, April 21, 2026. Testing will begin at approximately 1600 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 test needs to be postponed, due to weather or another event, the testing will instead commence at the affected offices on April 23, 2026. For the test, HTI grids will be created for tropical 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. 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 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 $$ ]]> forecast 21 Apr 2026 16:14:00 GMT http://www.weather.gov/hfo/pns#.2604211614 W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) http://www.weather.gov/hfo/pns#.2604201944 NOHW40 PHFO 201944 PNSHFO HIZ015-016-022-023-026>028-042-044-047-048-050>054-212300- Public Information Statement National Weather Service Honolulu HI 940 AM HST Fri Apr 20 2026 ...NOAA WEATHER RADIO OUTAGE THIS MORNING FOR BIG ISLAND TRANSMITTER... Routine maintenance from 1000 am to 1 pm HST today will cause a disruption of service for the following Big Island NOAA Weather transmitter: WWG27 South Point on 162.550 MHz. $$ ]]> forecast 20 Apr 2026 19:40:00 GMT http://www.weather.gov/hfo/pns#.2604201944 W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) http://www.weather.gov/hfo/pns#.2604180035 NOHW40 PHFO 180035 PNSHFO HIZ001-003-004-006-007-009>011-015>018-022-023-026>054-181245- Public Information Statement National Weather Service Honolulu HI 235 PM HST Fri Apr 17 2026 ...EARLY APRIL HEAVY RAINFALL... Surface low pressure with an associated frontal system developed to the west of the state, along with an upper level trough to the northwest, drawing an area of deep tropical moisture up from the south. This setup resulted in intermittent rounds of heavy rain and isolated thunderstorms over a 6-day period. The heaviest rain fell on the 7th into the 8th for the Big Island under pre-frontal southeast flow, then Kauai, Oahu, and Maui County from the 9th into the 11th as the dissipating front moved eastward down the island chain, washing out around the Big Island on the 11th. Another shortwave rotated through the upper trough the night of the 11th into the 12th, tapping into lingering moisture to bring another round of heavy rain and thunderstorms to portions of the western and central islands. The heavy rain resulted in several road closures due to flooding and land/rock slides, mainly on Kauai, Oahu, and southeast Big Island. The following are preliminary rainfall totals from 6 am Tuesday April 7 through 6 am Monday April 14, 2026. Island of Kauai Inches Mount Waialeale (USGS) 18.33 Mohihi Crossing (USGS) 12.57 Waiakoali (USGS) 12.34 Waialae (USGS) 12.20 Puu Lua (RAWS) 12.19 N Wailua Ditch (USGS) 10.52 Waiahi Rain Gage (USGS) 9.31 Kilohana (USGS) 9.28 Makaha Ridge (RAWS) 9.18 Puu Opae (RAWS) 8.58 Kalaheo (12008) 7.58 Hanapepe (12002) 7.42 Waimea Tank (12007) 7.10 Hanamaulu (UHM) 6.98 Wailua (12005) 6.82 Omao (12004) 6.74 Kapahi (12003) 6.44 Port Allen (HSOIS) 6.38 Waimea Heights (RAWS) 6.17 Lawai NTBG (UHM) 6.08 Lihue Var. Stn. (12006) 5.52 Moloaa Dairy (RAWS) 5.42 Poipu (HSOIS) 4.91 Lower Limahuli (UHM) 4.81 Wainiha (12010) 4.71 Lihue Airport (ASOS) 4.50 Common Ground (UHM) 4.31 Anahola (12001) 4.16 Island of Oahu Inches Kaala (UHM) 9.00 Kuaokala (RAWS) 8.98 Mililani (3040) 7.58 Schofield Barracks (RAWS) 6.87 Maunawili (13008) 6.74 Palisades (3020) 6.45 Kunia Substation (3030) 6.44 Schofield East (RAWS) 6.39 Hawaii Kai Golf Crse (13015) 6.38 Kamananui Stream (USGS) 6.36 Pupukea Road (USGS) 6.28 Palehua (RAWS) 6.25 Makaha Stream (USGS) 6.13 St. Stephens (13006) 6.12 Kalahee Ridge (UHM) 5.96 Kaluanui (UHM) 5.89 Dillingham (RAWS) 5.81 Kahuku Training Area (RAWS) 5.33 Oahu Forest NWR (USFWS) 5.28 Waianae Valley (RAWS) 5.26 Hakipuu Mauka (13004) 5.13 Luluku (13016) 5.09 Kahana (USGS) 4.94 Punaluu Stream (USGS) 4.93 Niu Valley (13001) 4.92 Waihee Pump (13002) 4.79 Tunnel RG (USGS) 4.76 Olomana Fire Station (13009) 4.73 Kii (RAWS) 4.68 Bellows AFS (HSOIS) 4.54 Makua Range (RAWS) 4.50 Heeia NERR (NOAA/NOS) 4.32 Waiahole (USGS) 4.23 Kalawahine (UHM) 4.20 Lyon (UHM) 4.12 Island of Molokai Inches Puu Alii (RAWS) 6.66 Honolimaloo (UHM) 6.40 Island of Lanai Inches Lanai City (14012) 4.71 Island of Maui Inches Hana Airport (HSOIS) 15.48 Summit (UHM) 6.00 Kula 1 (RAWS) 5.60 Hanaula (UHM) 5.47 Puu Kukui (USGS) 5.36 Kahakuloa (14002) 4.67 Ulupalakua (14003) 4.46 Na Kula 4.05 Island of Hawaii Inches Kealakomo (RAWS) 18.68 Pali 2 (RAWS) 15.95 Pahoa (15015) 13.77 Pahoa (UHM) 11.38 Kapapala (RAWS) 10.77 Pahala (15004) 10.64 Kapapala Ranch (15003) 9.24 Nahuku (UHM) 7.62 Kaiholena (UHM) 6.80 Keahuolu (UHM) 5.42 Nene Cabin (RAWS) 5.36 Mountain View (15014) 5.33 Keaumo (RAWS) 5.24 Puu Waawaa (UHM) 5.16 Glenwood (15013) 4.52 Papaikou Well (5070) 4.45 $$ BRAVENDER/TS ]]> forecast 18 Apr 2026 00:35:00 GMT http://www.weather.gov/hfo/pns#.2604180035 W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) http://www.weather.gov/hfo/pns#.2604171612 NOHW40 PHFO 171612 PNSHFO HIZ015-016-022-023-026>028-042-044-047-048-050>054-172300- Public Information Statement National Weather Service Honolulu HI 612 AM HST Fri Apr 17 2026 ...NOAA WEATHER RADIO OUTAGE THIS MORNING FOR BIG ISLAND TRANSMITTERS... Routine maintenance from 900 am to noon today will cause a disruption of service for the following Big Island NOAA Weather transmitters: WWG27 South Point on 162.550 MHz, WWG76 Kulani Cone on 162.500 MHz, and North Kohala on 162.500 MHz. $$ ]]> forecast 17 Apr 2026 16:12:00 GMT http://www.weather.gov/hfo/pns#.2604171612 W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) http://www.weather.gov/hfo/pns#.2604162358 NOHW40 PHFO 162358 PNSHFO HIZ015>018-022-023-026>028-042>054-180000- Public Information Statement National Weather Service Honolulu HI 158 PM HST Thu Apr 16 2026 ...INTERMITTENT NOAA WEATHER RADIO OUTAGES ON FRIDAY, APRIL 17, 2026... Technicians will be performing scheduled maintenance on the Big Island NOAA Weather Radio transmitters for WWG27 South Point on 162.550 MHz, WWG76 Kulani Cone on 162.500 MHz, and WZ2540 North Kohala on 162.500 MHz. Users can expect intermittent outages on these broadcasts between 2000 UTC (1000 AM HST) and 2300 UTC (100 PM HST) on Friday, April 17, 2026. $$ Vaughan ]]> forecast 16 Apr 2026 23:58:00 GMT http://www.weather.gov/hfo/pns#.2604162358 W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) http://www.weather.gov/hfo/pns#.2604092201 NOHW40 PHFO 092201 PNSHFO HIZ001-003-004-006-007-009>011-015>018-022-023-026>054-101015- Public Information Statement National Weather Service Honolulu HI 1201 PM HST Thu Apr 9 2026 ...NOAA WEATHER RADIO ROUTINE WEEKLY TEST CANCELLED... Due to potential severe weather, the Routine Weekly Test of NOAA Weather Radio stations in Hawaii will be cancelled for this week. Routine weekly tests will resume next week Wednesday, weather permitting. During potentially dangerous situations, specially built radio receivers can be automatically activated to warn of the impending hazard. The National Weather Service normally conducts a test of the NOAA Weather Radio public warning system between 11 am and noon each Wednesday. $$ ]]> forecast 09 Apr 2026 22:01:00 GMT http://www.weather.gov/hfo/pns#.2604092201 W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) http://www.weather.gov/hfo/pns#.2604082048 NOHW40 PHFO 082048 PNSHFO HIZ001-003-004-006-007-009>011-015>018-022-023-026>054-090900- Public Information Statement National Weather Service Honolulu HI 1048 AM HST Wed Apr 8 2026 ...NOAA WEATHER RADIO ROUTINE WEEKLY TEST POSTPONED... Due to potential severe weather, the Routine Weekly Test of NOAA Weather Radio stations in Hawaii will be postponed until the next available good weather day. If the severe weather threat continues and will require another postponement of the test, an updated statement will be sent at that time. During potentially dangerous situations, specially built radio receivers can be automatically activated to warn of the impending hazard. The National Weather Service normally conducts a test of the NOAA Weather Radio public warning system between 11 am and noon each Wednesday. $$ ]]> forecast 08 Apr 2026 20:48:00 GMT http://www.weather.gov/hfo/pns#.2604082048 W-HFO.Webmaster@noaa.gov (Honolulu Webmaster) http://www.weather.gov/hfo/pns#.2604030855 NOHW40 PHFO 030855 PNSHFO HIZ004-006-007-009>011-015-018-030>037-039>043-031500- Public Information Statement National Weather Service Honolulu HI 1055 PM HST Thu Apr 2 2026 ...NOAA WEATHER RADIO OUTAGE FOR KBA99... NOAA Weather Radio transmitter KBA99 Mt Kaala broadcasting on 162.550 MHz will be out of service for maintenance from midnight through 500 AM on Friday, April 3. $$ Wroe ]]> forecast 03 Apr 2026 08:55:00 GMT http://www.weather.gov/hfo/pns#.2604030855 W-HFO.Webmaster@noaa.gov (Honolulu Webmaster)