Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit https://www.weather.gov/owp/operations for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

DID YOU KNOW... Please try our new TEST hydrograph page link at: https://preview.water.noaa.gov/gauges/abcde - Just replace “abcde” with your local hydrograph five character ID found in the lower left corner of the hydrograph.  In late March of 2024, the base URL path will become water.noaa.gov.  Feedback can be provided HERE

Weather Forecast Office Boston / Norton, MA

Northeast River Forecast Center

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (EST) 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 reasonable worst case scenario. The forecast above is the total water forecast that is most likely to occur. NOTE: Forecasts for the Atlantic Coast at Provincetown Harbor (IN MLLW) are issued routinely year-round. Vertical Datum references a tidal datum (MLLW)...for more information see Tides and Currents .

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Flood Categories (in feet) Major Flood Stage: 15 Moderate Flood Stage: 14 Flood Stage: 13 Action Stage: 11.5 Low Stage (in feet): -9999 Historic Crests (1) 15.38 ft on 01/04/2018 (2) 14.48 ft on 03/02/2018 (3) 14.34 ft on 01/27/2015 (4) 14.24 ft on 03/03/2018 (5) 13.83 ft on 12/23/2022 (P) (6) 13.81 ft on 01/30/2018 (7) 13.66 ft on 01/30/2018 (8) 13.55 ft on 12/17/2020 (P) (9) 13.42 ft on 01/04/2015 (10) 13.30 ft on 05/25/2017 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 13.83 ft on 12/23/2022 (P) (2) 13.03 ft on 05/17/2022 (P) (3) 13.14 ft on 02/02/2021 (P) (4) 13.04 ft on 02/02/2021 (P) (5) 13.55 ft on 12/17/2020 (P) (6) 13.26 ft on 04/10/2020 (P) (7) 13.07 ft on 03/22/2019 (8) 13.08 ft on 01/20/2019 (9) 13.30 ft on 11/25/2018 (10) 14.24 ft on 03/03/2018 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available.

Zoom Level:16 Legend FEMA Layer 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

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17	Major, life threatening flooding occurs in Provincetown and Truro. Provincetown becomes isolated, with inundation along Routes 6 and 6A. Significant inundation occurs in the greater vicinity of Commercial Street and many adjacent side streets. Truro could become bisected with flooding along Route 6 and streets in the greater vicinity of the Pamet River and Little Pamet River marshes. Heed the advice of local officials, and evacuate if asked to do so.
16	Major coastal flooding occurs in Provincetown and Truro, with Provincetown becoming isolated due to inundation of Routes 6 and 6A. Numerous roads in Provincetown are flooded, including but not limited to large stretches of Commercial Street, Routes 6 and 6A, as well as connecticing side streets. Provincetown Airport is completely flooded. In Truro major flooding occurs in the greater vicinity of the Pamet River and Little Pamet River and associated marshland, with inundation along numerous nearby roads.
15	Major coastal flooding occurs in Provincetown and Truro. This includes flooding of Provincetown Airport, and inundation along stretches of numerous roads including Routes 6 and 6A, stretches of Commercial Street and nearby side streets. Provincetown may become isolated. In Truro portions of Route 6 and 6A are also flooded, with flooding of roadways including Dechampes Way, Great Hills and Salt Marsh Lanes, and Fisher, Old County, Castle, Great Hills and Old Pamet Roads.
14	Expect moderate coastal flooding in the vicinity of Provincetown and Truro. In Provincetown, flooding occurs at Provincetown Municipal Airport, Race Point Road, Provincelands Road, and portions of Commercial Street and Route 6A. In Truro flooding occurs in the vicinity of the Pamet River and Parker Marsh, with flooding on several roads including Castle Road, Eagle Neck Road, Phats Valley Road and Mill Pond Road. Heed the advice of local officials, and evacuate if asked to do so.
13	Expect minor coastal flooding of some low lying roadways. Minor coastal flooding occurs in Provincetown, in the vicinity of Race Point Road and Provincetown Airport. In Truro backwater flooding occurs along the Pamet River.

About This Location

Latitude: 42.049700° N, Longitude: 70.182200° 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 -5.46 7.54 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

Tide gage located on MacMillian Wharf in Provincetown. Data courtesy of the United States Geological Survey (USGS).

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Snow Information Ensemble River Forecasts Hourly Precipitation

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 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:30 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities