High Surf Advisory
NWS Honolulu HI ยท US
Details
High Surf Advisory Now In Effect Until 6 PM HST Sunday
- Event
- High Surf Advisory
- Issued
- Onset
- Message expires
- Expected end
- Category
- Meteorological
- Urgency
- Expected
- Severity
- Minor
- Certainty
- Likely
- Response
- Avoid
Description
Overview
...HIGH SURF ADVISORY IN EFFECT FOR EAST FACING SHORES OF NIIHAU KAUAI AND OAHU TONIGHT THROUGH SUNDAY... ...HIGH SURF ADVISORY FOR EAST AND SOUTHEAST FACING SHORES OF MOLOKAI MAUI AND THE BIG ISLAND NOW IN EFFECT THROUGH SUNDAY... .Hurricane Nolo inches north toward the Big Island then turns west on Saturday while remaining south of the Hawaiian Islands. Nolo is producing a moderate swell that is causing building surf along east and southeast facing shores of the Big Island, Maui, and Molokai. Strengthening trades will then cause building surf along east-facing shorelines beginning tonight and continuing through Sunday.
What
Large breaking waves of 8 to 12 feet today, increasing to 10 to 14 feet Saturday.
Where
East and southeast facing shores of Big Island Maui and Molokai.
When
Until 6 PM HST Sunday.
Impacts
Moderate to High. Strong breaking waves and strong currents will make swimming dangerous. Expect very strong breaking waves and powerful currents. Waves breaking in channel entrances may make navigating the channels dangerous.
Instructions
Heed all advice from ocean safety officials. When in doubt, don't go out.
Affected areas
- Maui Windward West
- Molokai Windward
- Molokai Southeast
- Windward Haleakala
- Kipahulu
- South Haleakala
- Big Island Southeast
- Big Island East
- Big Island North
Public contact
- Issuer
- NWS Honolulu HI
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~1m0s
- CAP status
- Actual
- CAP message type
- Update
- Lifecycle
- Updated
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M3D01J8WGY17KZ3ME8J32PCV
- Identifier
- urn:oid:2.49.0.1.840.0.2c96a617875240ddef9e1646f0df01606852dc0c.002.1
- 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.2246
- WMO heading
- XOHW50
- WMO data type
- CAP alert message XML (XO)
- WMO geography
- Hawaiian Islands (HW)
- WMO bulletin number
- 50
References
- Sender
- w-nws.webmaster@noaa.gov
- Sent
- Sender
- w-nws.webmaster@noaa.gov
- Sent
- Sender
- w-nws.webmaster@noaa.gov
- Sent
- Sender
- w-nws.webmaster@noaa.gov
- Sent
Event codes
| Name | Value |
|---|---|
| SAME | NWS |
| NationalWeatherService | SUY |
Parameters
| Name | Value |
|---|---|
| AWIPSidentifier | CFWHFO |
| WMOidentifier | WHHW40 PHFO 251917 |
| NWSheadline | HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 PM HST SUNDAY |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| VTEC | /O.EXT.PHFO.SU.Y.0039.000000T0000Z-260928T0400Z/ |
| eventEndingTime | 2026-09-27T18:00:00-10:00 |
| BLOCKCHANNEL | CMAS |
| expiredReferences | w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.b73608e0380d3924f185c9462ff3222b8f461aea.001.1,2026-09-24T17:13:00-10:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.79557448fbfb08242b850a44bd9fb65bf8aa8604.001.1,2026-09-24T16:02:00-10:00 |
Locations
Location data
- Maui Windward West
- Molokai Windward
- Molokai Southeast
- Windward Haleakala
- Kipahulu
- South Haleakala
- Big Island Southeast
- Big Island East
- Big Island North
| Name | Value |
|---|---|
| SAME | 015009 |
| SAME | 015001 |
| UGC | HIZ017 |
| UGC | HIZ037 |
| UGC | HIZ038 |
| UGC | HIZ047 |
| UGC | HIZ048 |
| UGC | HIZ050 |
| UGC | HIZ052 |
| UGC | HIZ053 |
| UGC | HIZ054 |