Warning Vector

High Surf Advisory

NWS Boston/Norton MA ยท US

New

Details

Coastal Flood Warning Remains In Effect Until 8 PM EDT Sunday... ...High Surf Advisory Remains In Effect Until 8 PM EDT Sunday

Event
High Surf Advisory
Issued
Onset
Message expires
Expected end
Category
Meteorological
Urgency
Expected
Severity
Minor
Certainty
Likely
Response
Avoid

Description

What

For the Coastal Flood Warning, up to one foot of inundation above ground level in low-lying areas near shorelines and tidal waterways (4.0 to 12.6 feet Mean Lower Low Water). For the High Surf Advisory, large breaking waves of 6 to 13 feet in the surf zone.

Where

Eastern Essex MA, Suffolk MA, Eastern Norfolk MA, Eastern Plymouth MA, Barnstable MA, Dukes MA and Nantucket MA Counties.

When

Until 8 PM EDT Sunday.

Impacts

Strong northeast winds with large waves will result in minor coastal flooding with pockets of moderate coastal flooding over multiple high tide cycles from late today through the weekend. The water also may struggle to vacate the area after the high tides given persistent strong northeast winds. The greatest risk for coastal flooding appears to be setting up south of Boston and onto the Cape and Islands. In addition...the long duration of northeast winds coupled with large waves over multiple high tide cycles will result in areas of severe beach erosion for a prolonged period.

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. Inexperienced swimmers should remain out of the water due to dangerous surf conditions.

Affected areas

  • Eastern Essex
  • Suffolk County, MA
  • Eastern Norfolk
  • Eastern Plymouth
  • Barnstable County, MA
  • Dukes County, MA
  • Nantucket County, MA

Public contact

Issuer
NWS Boston/Norton MA

Message record

Received
Issue to receipt
~1m0s
CAP status
Actual
CAP message type
Alert
Lifecycle
New
Source
NWWS-OI
Feed
NWWS
Recovered
No
CAP routing and identity
ULID
01M3E4TXVEX85KHEWD8SPHEJXS
Identifier
urn:oid:2.49.0.1.840.0.584fa418c25e95720c08be8164a94cc0aa4492fa.001.2
Sender
w-nws.webmaster@noaa.gov
Scope
Public
CAP source
211803 v2.3.0
Handling codes
IPAWSv1.0
Issuing office
NWS Boston/Norton MA
AWIPS ID
CAPBOX
NWWS sequence
nwws_processor.8425
WMO heading
XOUS51
WMO data type
CAP alert message XML (XO)
WMO geography
United States (US)
WMO bulletin number
51

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
Sender
w-nws.webmaster@noaa.gov
Sent

Event codes

NameValue
SAMENWS
NationalWeatherServiceSUY

Parameters

NameValue
AWIPSidentifierCFWBOX
WMOidentifierWHUS41 KBOX 260600
NWSheadlineCOASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 8 PM EDT SUNDAY... ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SUNDAY
BLOCKCHANNELEAS
BLOCKCHANNELNWEM
VTEC/O.CON.KBOX.SU.Y.0003.000000T0000Z-260928T0000Z/
eventEndingTime2026-09-27T20:00:00-04:00
BLOCKCHANNELCMAS
expiredReferencesw-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.fca4f35db744eb7691ecf6345865d03a0b01d22a.001.2,2026-09-25T12:35:00-04:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.76ef1683913f683c323dff93dbf483db80775d54.001.2,2026-09-25T07:20:00-04:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.70f55c0c654856bc192c0d3f68b6c3037b2f4683.001.3,2026-09-25T01:53:00-04:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.ae75a7e36559e6fc48a29b53fe3a41bcb73abe9b.001.2,2026-09-24T13:11:00-04:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.984eb22df268966f70859e671c6914f47a12ec7b.001.1,2026-09-24T02:08:00-04:00
Locations

Location data

  • Eastern Essex
  • Suffolk County, MA
  • Eastern Norfolk
  • Eastern Plymouth
  • Barnstable County, MA
  • Dukes County, MA
  • Nantucket County, MA
NameValue
SAME025009
SAME025021
SAME025025
SAME025023
SAME025001
SAME025007
SAME025019
UGCMAZ007
UGCMAZ015
UGCMAZ016
UGCMAZ019
UGCMAZ022
UGCMAZ023
UGCMAZ024