Coastal Flood Warning
NWS Boston/Norton MA ยท US
Details
High Surf Advisory Remains In Effect From 5 AM Early This Morning To 8 PM EDT Sunday... ...Coastal Flood Warning In Effect From 5 PM This Afternoon To 8 PM EDT Sunday
- Event
- Coastal Flood Warning
- Issued
- Onset
- Message expires
- Expected end
- Category
- Meteorological
- Urgency
- Expected
- Severity
- Severe
- Certainty
- Likely
- Response
- Avoid
Description
What
For the High Surf Advisory, large breaking waves of 6 to 13 feet expected in the surf zone. For the Coastal Flood Warning, up to one foot of inundation above ground level possible in low-lying areas near shorelines and tidal waterways (4.2 to 12.8 feet Mean Lower Low Water). An extended period of beach erosion is also expected.
Where
Eastern Essex MA, Suffolk MA, Eastern Norfolk MA, Eastern Plymouth MA, Barnstable MA, Dukes MA and Nantucket MA Counties.
When
For the High Surf Advisory, from 5 AM early this morning to 8 PM EDT Sunday. For the Coastal Flood Warning, from 5 PM this afternoon to 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 Friday through the weekend. 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 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
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~1m9s
- CAP status
- Actual
- CAP message type
- Alert
- Lifecycle
- New
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M3BJ1NFTBPQS7Q7DZNXPFW0A
- Identifier
- urn:oid:2.49.0.1.840.0.70f55c0c654856bc192c0d3f68b6c3037b2f4683.001.2
- 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.8287
- WMO heading
- XOUS51
- WMO data type
- CAP alert message XML (XO)
- WMO geography
- United States (US)
- WMO bulletin number
- 51
Event codes
| Name | Value |
|---|---|
| SAME | CFW |
| NationalWeatherService | CFW |
Parameters
| Name | Value |
|---|---|
| AWIPSidentifier | CFWBOX |
| WMOidentifier | WHUS41 KBOX 250553 |
| NWSheadline | HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 AM EARLY THIS MORNING TO 8 PM EDT SUNDAY... ...COASTAL FLOOD WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 8 PM EDT SUNDAY |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.NEW.KBOX.CF.W.0003.260925T2100Z-260928T0000Z/ |
| eventEndingTime | 2026-09-27T20:00:00-04:00 |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Eastern Essex
- Suffolk County, MA
- Eastern Norfolk
- Eastern Plymouth
- Barnstable County, MA
- Dukes County, MA
- Nantucket County, MA
| Name | Value |
|---|---|
| SAME | 025009 |
| SAME | 025021 |
| SAME | 025025 |
| SAME | 025023 |
| SAME | 025001 |
| SAME | 025007 |
| SAME | 025019 |
| UGC | MAZ007 |
| UGC | MAZ015 |
| UGC | MAZ016 |
| UGC | MAZ019 |
| UGC | MAZ022 |
| UGC | MAZ023 |
| UGC | MAZ024 |