Flood Watch

NWS Honolulu HI · US

Updated

Details

Flood Watch Remains In Effect Through This Afternoon

Event: Flood Watch
Issued: 2026-09-26 13:48:00 UTC
Onset: 2026-09-26 13:48:00 UTC
Message expires: 2026-09-27 04:00:00 UTC
Expected end: 2026-09-27 04:00:00 UTC
Category: Meteorological
Urgency: Future
Severity: Severe
Certainty: Possible
Response: Prepare

Description

Overview

Hurricane Nolo remains nearly stationary south of the Big Island. The possibility of heavy rain could lead to localized flooding over portions of the Big Island and Maui.

What

Flash flooding caused by excessive rainfall is possible.

Where

Big Island, Maui, Lanai, Molokai, and Kahoolawe.

When

Through this afternoon.

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. Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain.

Additional details

- The possibility remains for localized flooding over areas of the Big Island and Maui due to heavy rain from slow moving Hurricane Nolo to the south of the Big Island. Areas most at risk for flooding are the windward and southeast portions of the Big Island where the ground remains saturated after recent rains.

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: 2026-09-26 13:48:24 UTC
Issue to receipt: ~24s
CAP status: Actual
CAP message type: Update
Lifecycle: Updated
Source: NWWS-OI
Feed: NWWS
Recovered: No

CAP routing and identity

ULID: 01M3EZJS6S2D08MXB8AYA7CNRD
Identifier: urn:oid:2.49.0.1.840.0.768c540e442a70b7e16cfdddaf347a4284ce134f.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.2454
WMO heading: XOHW50
WMO data type: CAP alert message XML (XO)
WMO geography: Hawaiian Islands (HW)
WMO bulletin number: 50

References

Identifier: urn:oid:2.49.0.1.840.0.2d123593485ebe94b0f32c96760b8d265195162d.001.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-26 02:53:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.63236fa3a4fb72ab342348c93af571cd44836a0c.001.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-25 14:35:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.cb1399e1cc8e8553e0387819fafb629a00062f5b.001.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-25 01:45:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.20a785c891f972e0073d00bbea65c5d10779d95f.001.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-25 02:51:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.0be23b1680d7f4f271507185e74b730f908185fa.001.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-24 14:48:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.27c93ef1b29bda3e04166629795fe71aa61e2ea6.001.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-23 13:44:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.59599f54f3e9e47644ed14ad1fd6294e24114766.001.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-23 00:48:00 UTC

Event codes

Name	Value
SAME	FFA
NationalWeatherService	FAA

Parameters

Name	Value
AWIPSidentifier	FFAHFO
WMOidentifier	WGHW60 PHFO 261348
NWSheadline	FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON
BLOCKCHANNEL	EAS
BLOCKCHANNEL	NWEM
EAS-ORG	WXR
VTEC	/O.CON.PHFO.FA.A.0013.000000T0000Z-260927T0400Z/
eventEndingTime	2026-09-26T18:00:00-10:00
BLOCKCHANNEL	CMAS
expiredReferences	w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.63236fa3a4fb72ab342348c93af571cd44836a0c.001.1,2026-09-25T04:35:00-10:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.cb1399e1cc8e8553e0387819fafb629a00062f5b.001.1,2026-09-24T15:45:00-10:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.20a785c891f972e0073d00bbea65c5d10779d95f.001.1,2026-09-24T16:51:00-10:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.0be23b1680d7f4f271507185e74b730f908185fa.001.1,2026-09-24T04:48:00-10:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.27c93ef1b29bda3e04166629795fe71aa61e2ea6.001.1,2026-09-23T03:44:00-10:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.59599f54f3e9e47644ed14ad1fd6294e24114766.001.1,2026-09-22T14:48:00-10:00

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