Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left
Bookmark and Share Navigation Bar End Cap

  
  Notice: New features, functions, and enhancements to AHPS pages as of 8/11/2015. Click here for details

Hydrograph River at a Glance Download
Assabet River at Maynard Stage (ft)Flow (kcfs)Highest Observation: 1.29 ft at 4:00PM Aug 27, 2015Highest Observation: 1.29 ft at 4:15PM Aug 27, 2015Highest Observation: 1.29 ft at 4:30PM Aug 27, 2015Highest Observation: 1.29 ft at 4:45PM Aug 27, 2015Highest Observation: 1.29 ft at 5:00PM Aug 27, 2015Highest Observation: 1.29 ft at 5:15PM Aug 27, 2015Observed: 1.28 ft at 5:30PM Aug 27, 2015Observed: 1.28 ft at 5:45PM Aug 27, 2015Observed: 1.28 ft at 6:00PM Aug 27, 2015Observed: 1.28 ft at 6:15PM Aug 27, 2015Observed: 1.27 ft at 6:30PM Aug 27, 2015Observed: 1.27 ft at 6:45PM Aug 27, 2015Observed: 1.26 ft at 7:00PM Aug 27, 2015Observed: 1.26 ft at 7:15PM Aug 27, 2015Observed: 1.25 ft at 7:30PM Aug 27, 2015Observed: 1.25 ft at 7:45PM Aug 27, 2015Observed: 1.25 ft at 8:00PM Aug 27, 2015Observed: 1.25 ft at 8:15PM Aug 27, 2015Observed: 1.24 ft at 8:30PM Aug 27, 2015Observed: 1.24 ft at 8:45PM Aug 27, 2015Observed: 1.24 ft at 9:00PM Aug 27, 2015Observed: 1.24 ft at 9:15PM Aug 27, 2015Observed: 1.24 ft at 9:30PM Aug 27, 2015Observed: 1.24 ft at 9:45PM Aug 27, 2015Observed: 1.24 ft at 10:00PM Aug 27, 2015Observed: 1.24 ft at 10:15PM Aug 27, 2015Observed: 1.24 ft at 10:30PM Aug 27, 2015Observed: 1.24 ft at 10:45PM Aug 27, 2015Observed: 1.24 ft at 11:00PM Aug 27, 2015Observed: 1.24 ft at 11:15PM Aug 27, 2015Observed: 1.24 ft at 11:30PM Aug 27, 2015Observed: 1.24 ft at 11:45PM Aug 27, 2015Observed: 1.26 ft at 12:00AM Aug 28, 2015Observed: 1.25 ft at 12:15AM Aug 28, 2015Observed: 1.25 ft at 12:30AM Aug 28, 2015Observed: 1.24 ft at 12:45AM Aug 28, 2015Observed: 1.24 ft at 1:00AM Aug 28, 2015Observed: 1.24 ft at 1:15AM Aug 28, 2015Observed: 1.24 ft at 1:30AM Aug 28, 2015Observed: 1.24 ft at 1:45AM Aug 28, 2015Observed: 1.24 ft at 2:00AM Aug 28, 2015Observed: 1.24 ft at 2:15AM Aug 28, 2015Observed: 1.24 ft at 2:30AM Aug 28, 2015Observed: 1.24 ft at 2:45AM Aug 28, 2015Observed: 1.24 ft at 3:00AM Aug 28, 2015Observed: 1.24 ft at 3:15AM Aug 28, 2015Observed: 1.24 ft at 3:30AM Aug 28, 2015Observed: 1.24 ft at 3:45AM Aug 28, 2015Observed: 1.24 ft at 4:00AM Aug 28, 2015Observed: 1.24 ft at 4:15AM Aug 28, 2015Observed: 1.24 ft at 4:30AM Aug 28, 2015Observed: 1.24 ft at 4:45AM Aug 28, 2015Observed: 1.24 ft at 5:00AM Aug 28, 2015Observed: 1.24 ft at 5:15AM Aug 28, 2015Observed: 1.24 ft at 5:30AM Aug 28, 2015Observed: 1.24 ft at 5:45AM Aug 28, 2015Observed: 1.25 ft at 6:00AM Aug 28, 2015Observed: 1.25 ft at 6:15AM Aug 28, 2015Observed: 1.25 ft at 6:30AM Aug 28, 2015Observed: 1.26 ft at 6:45AM Aug 28, 2015Observed: 1.25 ft at 7:00AM Aug 28, 2015Observed: 1.25 ft at 7:15AM Aug 28, 2015Observed: 1.25 ft at 7:30AM Aug 28, 2015Observed: 1.25 ft at 7:45AM Aug 28, 2015Observed: 1.25 ft at 8:00AM Aug 28, 2015Observed: 1.25 ft at 8:15AM Aug 28, 2015Observed: 1.25 ft at 8:30AM Aug 28, 2015Observed: 1.25 ft at 8:45AM Aug 28, 2015Observed: 1.25 ft at 9:00AM Aug 28, 2015Observed: 1.25 ft at 9:15AM Aug 28, 2015Observed: 1.25 ft at 9:30AM Aug 28, 2015Observed: 1.25 ft at 9:45AM Aug 28, 2015Observed: 1.25 ft at 10:00AM Aug 28, 2015Observed: 1.25 ft at 10:15AM Aug 28, 2015Observed: 1.25 ft at 10:30AM Aug 28, 2015Observed: 1.25 ft at 10:45AM Aug 28, 2015Observed: 1.25 ft at 11:00AM Aug 28, 2015Observed: 1.25 ft at 11:15AM Aug 28, 2015Observed: 1.25 ft at 11:30AM Aug 28, 2015Observed: 1.25 ft at 11:45AM Aug 28, 2015Observed: 1.25 ft at 12:00PM Aug 28, 2015Observed: 1.24 ft at 12:15PM Aug 28, 2015Observed: 1.24 ft at 12:30PM Aug 28, 2015Observed: 1.24 ft at 12:45PM Aug 28, 2015Observed: 1.24 ft at 1:00PM Aug 28, 2015Observed: 1.24 ft at 1:15PM Aug 28, 2015Observed: 1.24 ft at 1:30PM Aug 28, 2015Observed: 1.24 ft at 1:45PM Aug 28, 2015Observed: 1.24 ft at 2:00PM Aug 28, 2015Observed: 1.24 ft at 2:15PM Aug 28, 2015Observed: 1.23 ft at 2:30PM Aug 28, 2015Observed: 1.23 ft at 2:45PM Aug 28, 2015Observed: 1.23 ft at 3:00PM Aug 28, 2015Observed: 1.23 ft at 3:15PM Aug 28, 2015Observed: 1.23 ft at 3:30PM Aug 28, 2015Observed: 1.23 ft at 3:45PM Aug 28, 2015Observed: 1.23 ft at 4:00PM Aug 28, 2015Observed: 1.23 ft at 4:15PM Aug 28, 2015Observed: 1.23 ft at 4:30PM Aug 28, 2015Observed: 1.23 ft at 4:45PM Aug 28, 2015Observed: 1.23 ft at 5:00PM Aug 28, 2015Observed: 1.22 ft at 5:15PM Aug 28, 2015Observed: 1.22 ft at 5:30PM Aug 28, 2015Observed: 1.22 ft at 5:45PM Aug 28, 2015Observed: 1.22 ft at 6:00PM Aug 28, 2015Observed: 1.22 ft at 6:15PM Aug 28, 2015Observed: 1.22 ft at 6:30PM Aug 28, 2015Observed: 1.22 ft at 6:45PM Aug 28, 2015Observed: 1.22 ft at 7:00PM Aug 28, 2015Observed: 1.22 ft at 7:15PM Aug 28, 2015Observed: 1.22 ft at 7:30PM Aug 28, 2015Observed: 1.22 ft at 7:45PM Aug 28, 2015Observed: 1.22 ft at 8:00PM Aug 28, 2015Observed: 1.22 ft at 8:15PM Aug 28, 2015Observed: 1.22 ft at 8:30PM Aug 28, 2015Observed: 1.22 ft at 8:45PM Aug 28, 2015Observed: 1.22 ft at 9:00PM Aug 28, 2015Observed: 1.24 ft at 9:15PM Aug 28, 2015Observed: 1.22 ft at 9:30PM Aug 28, 2015Observed: 1.22 ft at 9:45PM Aug 28, 2015Observed: 1.22 ft at 10:00PM Aug 28, 2015Observed: 1.22 ft at 10:15PM Aug 28, 2015Observed: 1.22 ft at 10:30PM Aug 28, 2015Observed: 1.22 ft at 10:45PM Aug 28, 2015Observed: 1.22 ft at 11:00PM Aug 28, 2015Observed: 1.22 ft at 11:15PM Aug 28, 2015Observed: 1.22 ft at 11:30PM Aug 28, 2015Observed: 1.24 ft at 11:45PM Aug 28, 2015Observed: 1.22 ft at 12:00AM Aug 29, 2015Observed: 1.22 ft at 12:15AM Aug 29, 2015Observed: 1.22 ft at 12:30AM Aug 29, 2015Observed: 1.22 ft at 12:45AM Aug 29, 2015Observed: 1.22 ft at 1:00AM Aug 29, 2015Observed: 1.22 ft at 1:15AM Aug 29, 2015Observed: 1.22 ft at 1:30AM Aug 29, 2015Observed: 1.22 ft at 1:45AM Aug 29, 2015Observed: 1.22 ft at 2:00AM Aug 29, 2015Observed: 1.22 ft at 2:15AM Aug 29, 2015Observed: 1.21 ft at 2:30AM Aug 29, 2015Observed: 1.21 ft at 2:45AM Aug 29, 2015Observed: 1.21 ft at 3:00AM Aug 29, 2015Observed: 1.21 ft at 3:15AM Aug 29, 2015Observed: 1.21 ft at 3:30AM Aug 29, 2015Observed: 1.21 ft at 3:45AM Aug 29, 2015Observed: 1.21 ft at 4:00AM Aug 29, 2015Observed: 1.21 ft at 4:15AM Aug 29, 2015Observed: 1.21 ft at 4:30AM Aug 29, 2015Observed: 1.21 ft at 4:45AM Aug 29, 2015Observed: 1.21 ft at 5:00AM Aug 29, 2015Observed: 1.21 ft at 5:15AM Aug 29, 2015Observed: 1.21 ft at 5:30AM Aug 29, 2015Observed: 1.21 ft at 5:45AM Aug 29, 2015Observed: 1.21 ft at 6:00AM Aug 29, 2015Observed: 1.21 ft at 6:15AM Aug 29, 2015Observed: 1.21 ft at 6:30AM Aug 29, 2015Observed: 1.21 ft at 6:45AM Aug 29, 2015Observed: 1.21 ft at 7:00AM Aug 29, 2015Observed: 1.21 ft at 7:15AM Aug 29, 2015Observed: 1.21 ft at 7:30AM Aug 29, 2015Observed: 1.2 ft at 7:45AM Aug 29, 2015Observed: 1.2 ft at 8:00AM Aug 29, 2015Observed: 1.21 ft at 8:15AM Aug 29, 2015Observed: 1.2 ft at 8:30AM Aug 29, 2015Observed: 1.21 ft at 8:45AM Aug 29, 2015Observed: 1.21 ft at 9:00AM Aug 29, 2015Observed: 1.21 ft at 9:15AM Aug 29, 2015Observed: 1.21 ft at 9:30AM Aug 29, 2015Observed: 1.21 ft at 9:45AM Aug 29, 2015Observed: 1.21 ft at 10:00AM Aug 29, 2015Observed: 1.21 ft at 10:15AM Aug 29, 2015Observed: 1.21 ft at 10:30AM Aug 29, 2015Observed: 1.21 ft at 10:45AM Aug 29, 2015Observed: 1.21 ft at 11:00AM Aug 29, 2015Observed: 1.21 ft at 11:15AM Aug 29, 2015Observed: 1.22 ft at 11:30AM Aug 29, 2015Observed: 1.22 ft at 11:45AM Aug 29, 2015Observed: 1.22 ft at 12:00PM Aug 29, 2015Observed: 1.22 ft at 12:15PM Aug 29, 2015Observed: 1.22 ft at 12:30PM Aug 29, 2015Observed: 1.21 ft at 12:45PM Aug 29, 2015Observed: 1.21 ft at 1:00PM Aug 29, 2015Observed: 1.21 ft at 1:15PM Aug 29, 2015Observed: 1.2 ft at 1:30PM Aug 29, 2015Observed: 1.19 ft at 1:45PM Aug 29, 2015Observed: 1.19 ft at 2:00PM Aug 29, 2015Observed: 1.18 ft at 2:15PM Aug 29, 2015Observed: 1.18 ft at 2:30PM Aug 29, 2015Observed: 1.18 ft at 2:45PM Aug 29, 2015Observed: 1.18 ft at 3:00PM Aug 29, 2015Observed: 1.17 ft at 3:15PM Aug 29, 2015Observed: 1.17 ft at 3:30PM Aug 29, 2015Observed: 1.17 ft at 3:45PM Aug 29, 2015Observed: 1.17 ft at 4:00PM Aug 29, 2015Observed: 1.17 ft at 4:15PM Aug 29, 2015Observed: 1.17 ft at 4:30PM Aug 29, 2015Observed: 1.17 ft at 4:45PM Aug 29, 2015Observed: 1.17 ft at 5:00PM Aug 29, 2015Observed: 1.17 ft at 5:15PM Aug 29, 2015Observed: 1.18 ft at 5:30PM Aug 29, 2015Observed: 1.18 ft at 5:45PM Aug 29, 2015Observed: 1.18 ft at 6:00PM Aug 29, 2015Observed: 1.18 ft at 6:15PM Aug 29, 2015Observed: 1.18 ft at 6:30PM Aug 29, 2015Observed: 1.17 ft at 6:45PM Aug 29, 2015Observed: 1.17 ft at 7:00PM Aug 29, 2015Observed: 1.17 ft at 7:15PM Aug 29, 2015Observed: 1.17 ft at 7:30PM Aug 29, 2015Observed: 1.17 ft at 7:45PM Aug 29, 2015Observed: 1.17 ft at 8:00PM Aug 29, 2015Observed: 1.17 ft at 8:15PM Aug 29, 2015Observed: 1.17 ft at 8:30PM Aug 29, 2015Observed: 1.17 ft at 8:45PM Aug 29, 2015Observed: 1.17 ft at 9:00PM Aug 29, 2015Observed: 1.17 ft at 9:15PM Aug 29, 2015Observed: 1.17 ft at 9:30PM Aug 29, 2015Observed: 1.17 ft at 9:45PM Aug 29, 2015Observed: 1.17 ft at 10:00PM Aug 29, 2015Observed: 1.17 ft at 10:15PM Aug 29, 2015Observed: 1.17 ft at 10:30PM Aug 29, 2015Observed: 1.17 ft at 10:45PM Aug 29, 2015Observed: 1.17 ft at 11:00PM Aug 29, 2015Observed: 1.17 ft at 11:15PM Aug 29, 2015Observed: 1.17 ft at 11:30PM Aug 29, 2015Observed: 1.17 ft at 11:45PM Aug 29, 2015Observed: 1.17 ft at 12:00AM Aug 30, 2015Observed: 1.17 ft at 12:15AM Aug 30, 2015Observed: 1.17 ft at 12:30AM Aug 30, 2015Observed: 1.17 ft at 12:45AM Aug 30, 2015Observed: 1.17 ft at 1:00AM Aug 30, 2015Observed: 1.17 ft at 1:15AM Aug 30, 2015Observed: 1.17 ft at 1:30AM Aug 30, 2015Observed: 1.17 ft at 1:45AM Aug 30, 2015Observed: 1.17 ft at 2:00AM Aug 30, 2015Observed: 1.17 ft at 2:15AM Aug 30, 2015Observed: 1.17 ft at 2:30AM Aug 30, 2015Observed: 1.17 ft at 2:45AM Aug 30, 2015Observed: 1.17 ft at 3:00AM Aug 30, 2015Observed: 1.17 ft at 3:15AM Aug 30, 2015Observed: 1.17 ft at 3:30AM Aug 30, 2015Observed: 1.17 ft at 3:45AM Aug 30, 2015Observed: 1.17 ft at 4:00AM Aug 30, 2015Observed: 1.17 ft at 4:15AM Aug 30, 2015Observed: 1.17 ft at 4:30AM Aug 30, 2015Observed: 1.17 ft at 4:45AM Aug 30, 2015Observed: 1.17 ft at 5:00AM Aug 30, 2015Observed: 1.17 ft at 5:15AM Aug 30, 2015Observed: 1.17 ft at 5:30AM Aug 30, 2015Observed: 1.17 ft at 5:45AM Aug 30, 2015Observed: 1.17 ft at 6:00AM Aug 30, 2015Observed: 1.17 ft at 6:15AM Aug 30, 2015Observed: 1.17 ft at 6:30AM Aug 30, 2015Observed: 1.17 ft at 6:45AM Aug 30, 2015Observed: 1.17 ft at 7:00AM Aug 30, 2015Observed: 1.17 ft at 7:15AM Aug 30, 2015Observed: 1.17 ft at 7:30AM Aug 30, 2015Observed: 1.17 ft at 7:45AM Aug 30, 2015Observed: 1.17 ft at 8:00AM Aug 30, 2015Observed: 1.17 ft at 8:15AM Aug 30, 2015Observed: 1.17 ft at 8:30AM Aug 30, 2015Observed: 1.17 ft at 8:45AM Aug 30, 2015Observed: 1.17 ft at 9:00AM Aug 30, 2015Observed: 1.17 ft at 9:15AM Aug 30, 2015Observed: 1.17 ft at 9:30AM Aug 30, 2015Observed: 1.17 ft at 9:45AM Aug 30, 2015Observed: 1.18 ft at 10:00AM Aug 30, 2015Observed: 1.18 ft at 10:15AM Aug 30, 2015Observed: 1.18 ft at 10:30AM Aug 30, 2015Observed: 1.18 ft at 10:45AM Aug 30, 2015Observed: 1.18 ft at 11:00AM Aug 30, 2015Observed: 1.18 ft at 11:15AM Aug 30, 2015Observed: 1.18 ft at 11:30AM Aug 30, 2015Observed: 1.18 ft at 11:45AM Aug 30, 2015Observed: 1.18 ft at 12:00PM Aug 30, 2015Observed: 1.18 ft at 12:15PM Aug 30, 2015Observed: 1.18 ft at 12:30PM Aug 30, 2015Observed: 1.18 ft at 12:45PM Aug 30, 2015Observed: 1.18 ft at 1:00PM Aug 30, 2015Observed: 1.18 ft at 1:15PM Aug 30, 2015Observed: 1.18 ft at 1:30PM Aug 30, 2015Observed: 1.18 ft at 1:45PM Aug 30, 2015Observed: 1.18 ft at 2:00PM Aug 30, 2015Observed: 1.18 ft at 2:15PM Aug 30, 2015Observed: 1.18 ft at 2:30PM Aug 30, 2015Observed: 1.18 ft at 2:45PM Aug 30, 2015Observed: 1.18 ft at 3:00PM Aug 30, 2015Observed: 1.18 ft at 3:15PM Aug 30, 2015Highest Forecast: 1.2 ft 8:00PM Aug 30, 2015Highest Forecast: 1.2 ft 2:00AM Aug 31, 2015Highest Forecast: 1.2 ft 8:00AM Aug 31, 2015Highest Forecast: 1.2 ft 2:00PM Aug 31, 2015Highest Forecast: 1.2 ft 8:00PM Aug 31, 2015Highest Forecast: 1.2 ft 2:00AM Sep 01, 2015Highest Forecast: 1.2 ft 8:00AM Sep 01, 2015Highest Forecast: 1.2 ft 2:00PM Sep 01, 2015Highest Forecast: 1.2 ft 8:00PM Sep 01, 2015Highest Forecast: 1.2 ft 2:00AM Sep 02, 2015Highest Forecast: 1.2 ft 8:00AM Sep 02, 2015USGS--Water Resources of the United StatesMAYM3(plotting HGIRG) Graph Created (3:45PM Aug 30, 2015)ObservedForecast (issued 11:07AM Aug 30)Latest observed value: 1.18 ft at 3:15 PM EDT 30-Aug-2015. Flood Stage is 5 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts for the Assabet River at Maynard are issued routinely year-round.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 7
Moderate Flood Stage: 6
Flood Stage: 5
Action Stage: 4.5
Low Stage (in feet): 0

Historic Crests
(1) 8.94 ft on 08/20/1955
(2) 8.15 ft on 03/19/1968
(3) 8.11 ft on 01/26/1979
(4) 7.17 ft on 04/07/1987
(5) 7.14 ft on 03/16/2010
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 5.17 ft on 06/15/2013
(2) 5.09 ft on 03/13/2011
(3) 5.56 ft on 03/08/2011
(4) 7.08 ft on 03/31/2010
(5) 5.44 ft on 03/24/2010
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
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 Collapse
If you notice any errors in the below information, please contact our Webmaster
7 Significant flooding will affect interests along the river in Maynard, Concord and Hudson. Roadways may become impassable due to flood waters and some properties may need to be evacuated. Follow the directions of local emergency management officials.
6 Flooding is likely in low lying sections along the river including portions of Maynard, Hudson and Concord. Water may approach homes along the river and may force several localized road closures.
5 Minor lowland and backyard flooding is likely along reaches of the river in Maynard, Concord as well as Hudson. Several river roads may also become covered in water.
About This Location Collapse

Latitude: 42.432038° N, Longitude: 71.449785° W, Horizontal Datum: NAD27

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 5 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 142.12 147.12 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other NULL NULL  

Current/Historical Observations:

Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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 Weather Forecast Office
445 Myles Standish Blvd
Taunton, MA 02780
Ask Questions/Webmaster
Page last modified: 13-Aug-2015 1:57 AM
Disclaimer
Credits
Glossary
Privacy Policy
About Us
Career Opportunities