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Weather Forecast Office Boston / Norton, MA

Northeast River Forecast Center

Hydrograph

River at a Glance

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Atlantic Coast at Dennis Sesuit Harbor (IN MLLW)

Printable Image

About this graph

Tabular Data (UTC)

Tabular Data (EDT)

Datum: Not Available

Metadata

NOTE: Please refer to our Coastal Hazard Message for specific information regarding Coastal Flood Watches, Warnings and Advisories. Actual impacts from any coastal flooding event may vary due to factors such as rainfall, wave action, and the number of tide cycles during which there is an onshore flow. During tropical cyclones, please refer here for additional storm surge information.

NOTE: During a Tropical Storm or Hurricane Watch or Warning, inundation mapping provided by the National Hurricane Center (go to the web site and select the storm of interest) reflects a plausible worst case scenario. The forecast above is the total water forecast that is most likely to occur.

NOTE: Forecasts for the Atlantic Coast at Dennis Sesuit Harbor (IN MLLW) are issued routinely year-round.

Vertical Datum references a tidal datum (MLLW)...for more information see Tides and Currents .

Return to Area Map

Flood Categories (in feet)

Major Flood Stage:	16
Moderate Flood Stage:	14.5
Flood Stage:	13
Action Stage:	12
Low Stage (in feet):	-9999

Historic Crests
(1) 16.38 ft on 01/27/2015
(2) 16.12 ft on 01/04/2018
(3) 15.21 ft on 03/02/2018
(4) 15.17 ft on 03/03/2018
(5) 14.51 ft on 02/19/2015
(6) 14.45 ft on 02/15/2015
(7) 14.35 ft on 01/30/2018
(8) 14.27 ft on 01/24/2015
(9) 14.11 ft on 01/22/2015
(10) 14.08 ft on 03/22/2015
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 13.26 ft on 12/14/2019 (P)
(2) 13.52 ft on 03/22/2019
(3) 13.40 ft on 01/20/2019
(4) 13.69 ft on 11/25/2018
(5) 15.17 ft on 03/03/2018
(6) 15.21 ft on 03/02/2018
(7) 14.35 ft on 01/30/2018
(8) 16.12 ft on 01/04/2018
(9) 13.08 ft on 07/25/2017
(10) 13.75 ft on 05/25/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

Zoom Level:16

	Gauge Location	Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

If you notice any errors in the below information, please contact our Webmaster
16	Expect major coastal flooding in the Cape Cod Bay area stretching from Sandwich eastward thru Brewster. This includes extensive flooding of low lying roads, including Route 6A. Buildings adjacent to Sandwich Harbor and some buildings around Town Neck Beach become flooded or surrounded by floodwaters. The Sandwich Boardwalk, Marina, and Harbormaster's Shack become flooded. Heed the advice of local officials, and evacuate if asked to do so.
15	Moderate to major coastal flooding is expected along portions of the Cape Cod Bay shoreline from Sandwich eastward thru Brewster, with some low lying homes and roadways becoming surrounded or inundated by floodwaters. Portions of Route 6A become flooded. Heed the advice of local officials, and evacuate if asked to do so.
14	Moderate coastal flooding is expected. Floodwaters will encroach and in some cases surround low lying homes along Cape Cod Bay in the greater vicinity of Sandwich, Brewster and Dennis. River Street in Sandwich becomes flooded and impassable. In Dennis and Brewester, a portion of Route 6A becomes flooded.
13	Minor coastal flooding occurs along lowest lying areas along the shoreline.

About This Location

Latitude: 41.751900° N, Longitude: 70.153900° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	13 ft	Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum	Elevation (gauge height = 0)	Elevation (gauge height = flood stage)	Elevation information source
NAVD88	-5.77	7.23	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	Not Available	Not Available	Older USGS topographic maps, NGVD29 benchmarks
MSL	Not Available	Not Available	Older USGS topographic maps, MSL benchmarks
Other	Not Available	13	MLLW (Mean Lower Low Water)

Additional Information

Gage data provided by the United States Geological Survey (USGS).

Resources

Hydrologic Resources

Additional Resources

Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

NWS Information

National Weather Service
Boston / Norton Weather Forecast Office
46 Commerce Way
Norton, MA 02766
(508) 622-3250
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Page last modified: 1-Mar-2019 12:35 AM

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