Special Marine Warning
NWS Honolulu HI ยท US
New
This event was updated at .
Details
Special Marine Warning Issued September 17 At 9:34AM HST Until September 17 At 10:30AM HST By NWS Honolulu HI
- Event
- Special Marine Warning
- Issued
- Onset
- Message expires
- Expected end
- Category
- Meteorological
- Urgency
- Immediate
- Severity
- Severe
- Certainty
- Likely
- Response
- Avoid
Description
Overview
SMWHFO The National Weather Service in Honolulu has issued a * Special Marine Warning for... Alenuihaha Channel... Big Island Leeward Waters... Big Island Windward Waters... * Until 1030 AM HST. * At 933 AM HST, strong thunderstorms were located along a line extending from 10 nm north of Upolu Point to 8 nm north of FAD Buoy HK. The strong thunderstorms were nearly stationary.
Hazard
Wind gusts 34 knots or greater and small hail.
Source
Radar.
Impacts
Small craft could be damaged in briefly higher winds and suddenly higher waves.
Locations impacted
FAD Buoy HK and Upolu Point.
Instructions
Prepare for gusty winds, steep and fast-building seas, and blinding downpours. Stay low or go below, and make sure all on board are wearing life jackets.
Affected areas
- Alenuihaha Channel
- Big Island Windward Waters
- Big Island Leeward Waters
Public contact
- Issuer
- NWS Honolulu HI
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~38s
- CAP status
- Actual
- CAP message type
- Alert
- Lifecycle
- New
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M2RDT8RKEMW2MDNWJPP5R162
- Identifier
- urn:oid:2.49.0.1.840.0.fd37507e988a2196ab676636087abc46738db82f.001.1
- Sender
- w-nws.webmaster@noaa.gov
- Scope
- Public
- CAP source
- 211803 v2.3.0
- Handling codes
- IPAWSv1.0
- Issuing office
- NWS Honolulu HI
- AWIPS ID
- CAPHFO
- NWWS sequence
- nwws_processor.2556
- WMO heading
- XOHW50
- WMO data type
- CAP alert message XML (XO)
- WMO geography
- Hawaiian Islands (HW)
- WMO bulletin number
- 50
Event codes
| Name | Value |
|---|---|
| SAME | SMW |
| NationalWeatherService | MAW |
Parameters
| Name | Value |
|---|---|
| AWIPSidentifier | SMWHFO |
| WMOidentifier | WHHW50 PHFO 171934 |
| eventMotionDescription | 2026-09-17T19:33:00-00:00...storm...323DEG...4KT...20.43,-155.8 20.11,-154.95 |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.NEW.PHFO.MA.W.0101.260917T1934Z-260917T2030Z/ |
| eventEndingTime | 2026-09-17T10:30:00-10:00 |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Alenuihaha Channel
- Big Island Windward Waters
- Big Island Leeward Waters
| Name | Value |
|---|---|
| SAME | 059121 |
| SAME | 059122 |
| SAME | 059123 |
| UGC | PHZ121 |
| UGC | PHZ122 |
| UGC | PHZ123 |
- Polygons
- 19.85,-154.97 19.94,-155.18 20.0,-155.25 20.1,-155.45 20.12,-155.6 20.19,-155.71 20.24,-155.76 20.26,-155.87 20.23,-155.9 20.25,-155.94 20.65,-155.82 20.28,-154.85 19.85,-154.97