Coastal Flood Warning

NWS Upton NY · US

Updated

Details

Coastal Flood Warning Remains In Effect Until 6 PM EDT This Evening

Event: Coastal Flood Warning
Issued: 2026-09-27 10:02:00 UTC
Onset: 2026-09-27 10:02:00 UTC
Message expires: 2026-09-27 18:15:00 UTC
Expected end: 2026-09-27 22:00:00 UTC
Category: Meteorological
Urgency: Expected
Severity: Severe
Certainty: Likely
Response: Avoid

Description

What

Two to 2 1/2 feet of inundation above ground level in vulnerable areas near the waterfront and shoreline.

Where

Northeast Suffolk County.

When

Until 6 PM EDT this evening. * COASTAL IMPACTS...Locally moderate flooding is expected in the most vulnerable locations near the waterfront and shoreline. Some roads and low lying property including parking lots, parks, lawns and homes/businesses with basements near the waterfront will experience shallow flooding. * SHOREFRONT/BEACH IMPACTS...Breaking waves of 4 to 8 feet, along with elevated water levels, will result in areas of dune erosion with damage to a few waterfront structures. Splashover over seawalls and overwashes where dune structures are compromised may locally exacerbate flooding of roadways and vulnerable structures behind protective dunes.

Instructions

Take the necessary actions to protect flood-prone property. If travel is required, do not drive around barricades or through water of unknown depth.

Affected areas

Northeast Suffolk

Public contact

Issuer: NWS Upton NY
Website: http://www.weather.gov

Message record

Received: 2026-09-27 10:02:55 UTC
Issue to receipt: ~55s
CAP status: Actual
CAP message type: Update
Lifecycle: Updated
Source: NWWS-OI
Feed: NWWS
Recovered: No

CAP routing and identity

ULID: 01M3H52MG7015P1PSC6F5YF28R
Identifier: urn:oid:2.49.0.1.840.0.4b664cc344902348ffbc40ec168c790205b4eb86.004.1
Sender: w-nws.webmaster@noaa.gov
Scope: Public
CAP source: 211803 v2.3.0
Handling codes: IPAWSv1.0
Issuing office: NWS Upton NY
AWIPS ID: CAPOKX
NWWS sequence: nwws_processor.6994
WMO heading: XOUS51
WMO data type: CAP alert message XML (XO)
WMO geography: United States (US)
WMO bulletin number: 51

References

Identifier: urn:oid:2.49.0.1.840.0.38d9a8ccbecb65dfc2f7f112189c8085fba16794.004.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-26 20:23:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.1d64166aecca43fb74cf38974ef5d113c8cadbb0.004.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-27 09:36:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.5fc2c07df9f96bd93565647920d09b90f7ca1592.006.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-25 20:44:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.61f02e743c8435d0dbf5b4a5e23fa6bf9784e86b.005.1
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-26 09:14:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.f5cb8aff25803c716998fe7ad961b885c6f232ce.010.2
Sender: w-nws.webmaster@noaa.gov
Sent: 2026-09-25 09:27:00 UTC

Event codes

Name	Value
SAME	CFW
NationalWeatherService	CFW

Parameters

Name	Value
AWIPSidentifier	CFWOKX
WMOidentifier	WHUS41 KOKX 271002
NWSheadline	COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM EDT THIS EVENING
BLOCKCHANNEL	EAS
BLOCKCHANNEL	NWEM
EAS-ORG	WXR
VTEC	/O.CON.KOKX.CF.W.0002.000000T0000Z-260927T2200Z/
eventEndingTime	2026-09-27T18:00:00-04:00
BLOCKCHANNEL	CMAS
expiredReferences	w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.5fc2c07df9f96bd93565647920d09b90f7ca1592.006.1,2026-09-25T16:44:00-04:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.61f02e743c8435d0dbf5b4a5e23fa6bf9784e86b.005.1,2026-09-26T05:14:00-04:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.f5cb8aff25803c716998fe7ad961b885c6f232ce.010.2,2026-09-25T05:27:00-04:00

Locations

Location data

Northeast Suffolk

Name	Value
SAME	036103
UGC	NYZ079