Flood Watch
NWS Honolulu HI ยท US
Details
Flood Watch Remains In Effect Through Late Tonight
- Event
- Flood Watch
- Issued
- Onset
- Message expires
- Expected end
- Category
- Meteorological
- Urgency
- Future
- Severity
- Severe
- Certainty
- Possible
- Response
- Prepare
Description
Overview
Remnant moisture from former Tropical Storm Norbert will bring periods of moderate to heavy showers to mainly windward sides of the Hawaiian Islands through late tonight.
What
Flash flooding caused by excessive rainfall continues to be possible.
Where
Maui, Lanai, Molokai, The Big Island and Kahoolawe.
When
Through late tonight.
Impacts
Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Urban areas may receive more significant flooding and property damage due to rapid runoff.
Additional details
- A band of remnant moisture from Norbert will move west across the islands through Friday, bringing moderate to locally heavy showers and isolated thunderstorms to mainly windward sides of the islands. Thunderstorms could produce briefly higher rain rates, increasing the risk of flash flooding.
Instructions
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Affected areas
- Lanai Mauka
- Kahoolawe
- Maui Windward West
- Maui Leeward West
- Haleakala Summit
- Kona
- Kohala
- Big Island Interior
- Big Island Summit
- Molokai Windward
- Molokai Southeast
- Molokai North
- Molokai West
- Molokai Leeward South
- Lanai Windward
- Lanai Leeward
- Lanai South
- Maui Central Valley North
- Maui Central Valley South
- Windward Haleakala
- Kipahulu
- South Maui/Upcountry
- South Haleakala
- Big Island South
- 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
- ~41s
- CAP status
- Actual
- CAP message type
- Update
- Lifecycle
- Updated
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M2S9M87PQ46Q7MNWTY95J49E
- Identifier
- urn:oid:2.49.0.1.840.0.e430d9b6ba91319e4d463fc108a9c7181b66e0bf.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.5047
- 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
Event codes
| Name | Value |
|---|---|
| SAME | FFA |
| NationalWeatherService | FAA |
Parameters
| Name | Value |
|---|---|
| AWIPSidentifier | FFAHFO |
| WMOidentifier | WGHW60 PHFO 180340 |
| NWSheadline | FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.CON.PHFO.FA.A.0012.000000T0000Z-260918T1600Z/ |
| eventEndingTime | 2026-09-18T06:00:00-10:00 |
| BLOCKCHANNEL | CMAS |
| expiredReferences | w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.0e2b6a9e0b5751903ff2e2982181acae7f3226f0.001.1,2026-09-16T16:03:00-10:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7b0791a98da5b2051b44577526918dda9d06e0cb.001.1,2026-09-16T15:41:00-10:00 |
Locations
Location data
- Lanai Mauka
- Kahoolawe
- Maui Windward West
- Maui Leeward West
- Haleakala Summit
- Kona
- Kohala
- Big Island Interior
- Big Island Summit
- Molokai Windward
- Molokai Southeast
- Molokai North
- Molokai West
- Molokai Leeward South
- Lanai Windward
- Lanai Leeward
- Lanai South
- Maui Central Valley North
- Maui Central Valley South
- Windward Haleakala
- Kipahulu
- South Maui/Upcountry
- South Haleakala
- Big Island South
- Big Island Southeast
- Big Island East
- Big Island North
| Name | Value |
|---|---|
| SAME | 015009 |
| SAME | 015001 |
| UGC | HIZ015 |
| UGC | HIZ016 |
| UGC | HIZ017 |
| UGC | HIZ018 |
| UGC | HIZ022 |
| UGC | HIZ023 |
| UGC | HIZ026 |
| UGC | HIZ027 |
| UGC | HIZ028 |
| UGC | HIZ037 |
| UGC | HIZ038 |
| UGC | HIZ039 |
| UGC | HIZ040 |
| UGC | HIZ041 |
| UGC | HIZ042 |
| UGC | HIZ043 |
| UGC | HIZ044 |
| UGC | HIZ045 |
| UGC | HIZ046 |
| UGC | HIZ047 |
| UGC | HIZ048 |
| UGC | HIZ049 |
| UGC | HIZ050 |
| UGC | HIZ051 |
| UGC | HIZ052 |
| UGC | HIZ053 |
| UGC | HIZ054 |