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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 March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

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Hydrograph River at a Glance Download
Shawsheen River at Wilmington Stage (ft)Flow (kcfs)Observed: 2.34 ft at 9:00AM Jun 02, 2023Observed: 2.34 ft at 9:15AM Jun 02, 2023Observed: 2.34 ft at 9:30AM Jun 02, 2023Observed: 2.34 ft at 9:45AM Jun 02, 2023Observed: 2.34 ft at 10:00AM Jun 02, 2023Observed: 2.34 ft at 10:15AM Jun 02, 2023Observed: 2.34 ft at 10:30AM Jun 02, 2023Observed: 2.34 ft at 10:45AM Jun 02, 2023Observed: 2.34 ft at 11:00AM Jun 02, 2023Observed: 2.34 ft at 11:15AM Jun 02, 2023Observed: 2.34 ft at 11:30AM Jun 02, 2023Observed: 2.34 ft at 11:45AM Jun 02, 2023Observed: 2.34 ft at 12:00PM Jun 02, 2023Observed: 2.34 ft at 12:15PM Jun 02, 2023Observed: 2.34 ft at 12:30PM Jun 02, 2023Observed: 2.34 ft at 12:45PM Jun 02, 2023Observed: 2.34 ft at 1:00PM Jun 02, 2023Observed: 2.34 ft at 1:15PM Jun 02, 2023Observed: 2.34 ft at 1:30PM Jun 02, 2023Observed: 2.33 ft at 1:45PM Jun 02, 2023Observed: 2.34 ft at 2:00PM Jun 02, 2023Observed: 2.33 ft at 2:15PM Jun 02, 2023Observed: 2.33 ft at 2:30PM Jun 02, 2023Observed: 2.33 ft at 2:45PM Jun 02, 2023Observed: 2.33 ft at 3:00PM Jun 02, 2023Observed: 2.33 ft at 3:15PM Jun 02, 2023Observed: 2.33 ft at 3:30PM Jun 02, 2023Observed: 2.33 ft at 3:45PM Jun 02, 2023Observed: 2.33 ft at 4:00PM Jun 02, 2023Observed: 2.33 ft at 4:15PM Jun 02, 2023Observed: 2.33 ft at 4:30PM Jun 02, 2023Observed: 2.33 ft at 4:45PM Jun 02, 2023Observed: 2.33 ft at 5:00PM Jun 02, 2023Observed: 2.33 ft at 5:15PM Jun 02, 2023Observed: 2.33 ft at 5:30PM Jun 02, 2023Observed: 2.33 ft at 5:45PM Jun 02, 2023Observed: 2.33 ft at 6:00PM Jun 02, 2023Observed: 2.33 ft at 6:15PM Jun 02, 2023Observed: 2.33 ft at 6:30PM Jun 02, 2023Observed: 2.33 ft at 6:45PM Jun 02, 2023Observed: 2.33 ft at 7:00PM Jun 02, 2023Observed: 2.33 ft at 7:15PM Jun 02, 2023Observed: 2.33 ft at 7:30PM Jun 02, 2023Observed: 2.35 ft at 7:45PM Jun 02, 2023Observed: 2.37 ft at 8:00PM Jun 02, 2023Observed: 2.38 ft at 8:15PM Jun 02, 2023Observed: 2.39 ft at 8:30PM Jun 02, 2023Observed: 2.41 ft at 8:45PM Jun 02, 2023Observed: 2.43 ft at 9:00PM Jun 02, 2023Observed: 2.45 ft at 9:15PM Jun 02, 2023Observed: 2.47 ft at 9:30PM Jun 02, 2023Observed: 2.5 ft at 9:45PM Jun 02, 2023Observed: 2.53 ft at 10:00PM Jun 02, 2023Observed: 2.55 ft at 10:15PM Jun 02, 2023Observed: 2.57 ft at 10:30PM Jun 02, 2023Observed: 2.59 ft at 10:45PM Jun 02, 2023Observed: 2.61 ft at 11:00PM Jun 02, 2023Observed: 2.63 ft at 11:15PM Jun 02, 2023Observed: 2.64 ft at 11:30PM Jun 02, 2023Observed: 2.66 ft at 11:45PM Jun 02, 2023Observed: 2.67 ft at 12:00AM Jun 03, 2023Observed: 2.69 ft at 12:15AM Jun 03, 2023Observed: 2.7 ft at 12:30AM Jun 03, 2023Observed: 2.71 ft at 12:45AM Jun 03, 2023Observed: 2.72 ft at 1:00AM Jun 03, 2023Observed: 2.74 ft at 1:15AM Jun 03, 2023Observed: 2.75 ft at 1:30AM Jun 03, 2023Observed: 2.76 ft at 1:45AM Jun 03, 2023Observed: 2.77 ft at 2:00AM Jun 03, 2023Observed: 2.78 ft at 2:15AM Jun 03, 2023Observed: 2.79 ft at 2:30AM Jun 03, 2023Observed: 2.79 ft at 2:45AM Jun 03, 2023Observed: 2.8 ft at 3:00AM Jun 03, 2023Observed: 2.81 ft at 3:15AM Jun 03, 2023Observed: 2.82 ft at 3:30AM Jun 03, 2023Observed: 2.83 ft at 3:45AM Jun 03, 2023Observed: 2.84 ft at 4:00AM Jun 03, 2023Observed: 2.84 ft at 4:15AM Jun 03, 2023Observed: 2.85 ft at 4:30AM Jun 03, 2023Observed: 2.86 ft at 4:45AM Jun 03, 2023Observed: 2.86 ft at 5:00AM Jun 03, 2023Observed: 2.87 ft at 5:15AM Jun 03, 2023Observed: 2.88 ft at 5:30AM Jun 03, 2023Observed: 2.88 ft at 5:45AM Jun 03, 2023Observed: 2.89 ft at 6:00AM Jun 03, 2023Observed: 2.89 ft at 6:15AM Jun 03, 2023Observed: 2.9 ft at 6:30AM Jun 03, 2023Observed: 2.9 ft at 6:45AM Jun 03, 2023Observed: 2.91 ft at 7:00AM Jun 03, 2023Observed: 2.91 ft at 7:15AM Jun 03, 2023Observed: 2.92 ft at 7:30AM Jun 03, 2023Observed: 2.92 ft at 7:45AM Jun 03, 2023Observed: 2.92 ft at 8:00AM Jun 03, 2023Observed: 2.93 ft at 8:15AM Jun 03, 2023Observed: 2.93 ft at 8:30AM Jun 03, 2023Observed: 2.94 ft at 8:45AM Jun 03, 2023Observed: 2.94 ft at 9:00AM Jun 03, 2023Observed: 2.94 ft at 9:15AM Jun 03, 2023Observed: 2.95 ft at 9:30AM Jun 03, 2023Observed: 2.95 ft at 9:45AM Jun 03, 2023Observed: 2.95 ft at 10:00AM Jun 03, 2023Observed: 2.96 ft at 10:15AM Jun 03, 2023Observed: 2.96 ft at 10:30AM Jun 03, 2023Observed: 2.97 ft at 10:45AM Jun 03, 2023Observed: 2.97 ft at 11:00AM Jun 03, 2023Observed: 2.98 ft at 11:15AM Jun 03, 2023Observed: 2.98 ft at 11:30AM Jun 03, 2023Observed: 2.99 ft at 11:45AM Jun 03, 2023Observed: 2.99 ft at 12:00PM Jun 03, 2023Observed: 2.99 ft at 12:15PM Jun 03, 2023Observed: 3 ft at 12:30PM Jun 03, 2023Observed: 3 ft at 12:45PM Jun 03, 2023Observed: 3.01 ft at 1:00PM Jun 03, 2023Observed: 3.01 ft at 1:15PM Jun 03, 2023Observed: 3.02 ft at 1:30PM Jun 03, 2023Observed: 3.02 ft at 1:45PM Jun 03, 2023Observed: 3.03 ft at 2:00PM Jun 03, 2023Observed: 3.03 ft at 2:15PM Jun 03, 2023Observed: 3.04 ft at 2:30PM Jun 03, 2023Observed: 3.04 ft at 2:45PM Jun 03, 2023Observed: 3.05 ft at 3:00PM Jun 03, 2023Observed: 3.06 ft at 3:15PM Jun 03, 2023Observed: 3.06 ft at 3:30PM Jun 03, 2023Observed: 3.07 ft at 3:45PM Jun 03, 2023Observed: 3.07 ft at 4:00PM Jun 03, 2023Observed: 3.08 ft at 4:15PM Jun 03, 2023Observed: 3.09 ft at 4:30PM Jun 03, 2023Observed: 3.1 ft at 4:45PM Jun 03, 2023Observed: 3.1 ft at 5:00PM Jun 03, 2023Observed: 3.11 ft at 5:15PM Jun 03, 2023Observed: 3.11 ft at 5:30PM Jun 03, 2023Observed: 3.12 ft at 5:45PM Jun 03, 2023Observed: 3.13 ft at 6:00PM Jun 03, 2023Observed: 3.14 ft at 6:15PM Jun 03, 2023Observed: 3.14 ft at 6:30PM Jun 03, 2023Observed: 3.15 ft at 6:45PM Jun 03, 2023Observed: 3.16 ft at 7:00PM Jun 03, 2023Observed: 3.16 ft at 7:15PM Jun 03, 2023Observed: 3.17 ft at 7:30PM Jun 03, 2023Observed: 3.18 ft at 7:45PM Jun 03, 2023Observed: 3.19 ft at 8:00PM Jun 03, 2023Observed: 3.19 ft at 8:15PM Jun 03, 2023Observed: 3.2 ft at 8:30PM Jun 03, 2023Observed: 3.21 ft at 8:45PM Jun 03, 2023Observed: 3.21 ft at 9:00PM Jun 03, 2023Observed: 3.22 ft at 9:15PM Jun 03, 2023Observed: 3.23 ft at 9:30PM Jun 03, 2023Observed: 3.24 ft at 9:45PM Jun 03, 2023Observed: 3.24 ft at 10:00PM Jun 03, 2023Observed: 3.25 ft at 10:15PM Jun 03, 2023Observed: 3.26 ft at 10:30PM Jun 03, 2023Observed: 3.26 ft at 10:45PM Jun 03, 2023Observed: 3.27 ft at 11:00PM Jun 03, 2023Observed: 3.28 ft at 11:15PM Jun 03, 2023Observed: 3.28 ft at 11:30PM Jun 03, 2023Observed: 3.3 ft at 11:45PM Jun 03, 2023Observed: 3.3 ft at 12:00AM Jun 04, 2023Observed: 3.31 ft at 12:15AM Jun 04, 2023Observed: 3.31 ft at 12:30AM Jun 04, 2023Observed: 3.32 ft at 12:45AM Jun 04, 2023Observed: 3.33 ft at 1:00AM Jun 04, 2023Observed: 3.33 ft at 1:15AM Jun 04, 2023Observed: 3.34 ft at 1:30AM Jun 04, 2023Observed: 3.35 ft at 1:45AM Jun 04, 2023Observed: 3.35 ft at 2:00AM Jun 04, 2023Observed: 3.35 ft at 2:15AM Jun 04, 2023Observed: 3.36 ft at 2:30AM Jun 04, 2023Observed: 3.37 ft at 2:45AM Jun 04, 2023Observed: 3.38 ft at 3:00AM Jun 04, 2023Observed: 3.38 ft at 3:15AM Jun 04, 2023Observed: 3.39 ft at 3:30AM Jun 04, 2023Observed: 3.4 ft at 3:45AM Jun 04, 2023Observed: 3.4 ft at 4:00AM Jun 04, 2023Observed: 3.4 ft at 4:15AM Jun 04, 2023Observed: 3.41 ft at 4:30AM Jun 04, 2023Observed: 3.41 ft at 4:45AM Jun 04, 2023Observed: 3.41 ft at 5:00AM Jun 04, 2023Observed: 3.42 ft at 5:15AM Jun 04, 2023Observed: 3.43 ft at 5:30AM Jun 04, 2023Observed: 3.43 ft at 5:45AM Jun 04, 2023Observed: 3.43 ft at 6:00AM Jun 04, 2023Observed: 3.44 ft at 6:15AM Jun 04, 2023Observed: 3.44 ft at 6:30AM Jun 04, 2023Observed: 3.45 ft at 6:45AM Jun 04, 2023Observed: 3.45 ft at 7:00AM Jun 04, 2023Observed: 3.45 ft at 7:15AM Jun 04, 2023Observed: 3.45 ft at 7:30AM Jun 04, 2023Observed: 3.46 ft at 7:45AM Jun 04, 2023Observed: 3.46 ft at 8:00AM Jun 04, 2023Observed: 3.46 ft at 8:15AM Jun 04, 2023Observed: 3.47 ft at 8:30AM Jun 04, 2023Observed: 3.47 ft at 8:45AM Jun 04, 2023Observed: 3.47 ft at 9:00AM Jun 04, 2023Observed: 3.47 ft at 9:15AM Jun 04, 2023Highest Observation: 3.48 ft at 9:30AM Jun 04, 2023Observed: 3.47 ft at 9:45AM Jun 04, 2023Observed: 3.47 ft at 10:00AM Jun 04, 2023Highest Observation: 3.48 ft at 10:15AM Jun 04, 2023Highest Observation: 3.48 ft at 10:30AM Jun 04, 2023Highest Observation: 3.48 ft at 10:45AM Jun 04, 2023Highest Observation: 3.48 ft at 11:00AM Jun 04, 2023Highest Observation: 3.48 ft at 11:15AM Jun 04, 2023Highest Observation: 3.48 ft at 11:30AM Jun 04, 2023Highest Observation: 3.48 ft at 11:45AM Jun 04, 2023Highest Observation: 3.48 ft at 12:00PM Jun 04, 2023Highest Observation: 3.48 ft at 12:15PM Jun 04, 2023Highest Observation: 3.48 ft at 12:30PM Jun 04, 2023Highest Observation: 3.48 ft at 12:45PM Jun 04, 2023Highest Observation: 3.48 ft at 1:00PM Jun 04, 2023Highest Observation: 3.48 ft at 1:15PM Jun 04, 2023Highest Observation: 3.48 ft at 1:30PM Jun 04, 2023Highest Observation: 3.48 ft at 1:45PM Jun 04, 2023Highest Observation: 3.48 ft at 2:00PM Jun 04, 2023Highest Observation: 3.48 ft at 2:15PM Jun 04, 2023Highest Observation: 3.48 ft at 2:30PM Jun 04, 2023Highest Observation: 3.48 ft at 2:45PM Jun 04, 2023Observed: 3.47 ft at 3:00PM Jun 04, 2023Observed: 3.47 ft at 3:15PM Jun 04, 2023Observed: 3.47 ft at 3:30PM Jun 04, 2023Observed: 3.47 ft at 3:45PM Jun 04, 2023Observed: 3.47 ft at 4:00PM Jun 04, 2023Observed: 3.47 ft at 4:15PM Jun 04, 2023Observed: 3.46 ft at 4:30PM Jun 04, 2023Observed: 3.46 ft at 4:45PM Jun 04, 2023Observed: 3.46 ft at 5:00PM Jun 04, 2023Observed: 3.46 ft at 5:15PM Jun 04, 2023Observed: 3.46 ft at 5:30PM Jun 04, 2023Observed: 3.46 ft at 5:45PM Jun 04, 2023Observed: 3.45 ft at 6:00PM Jun 04, 2023Observed: 3.45 ft at 6:15PM Jun 04, 2023Observed: 3.45 ft at 6:30PM Jun 04, 2023Observed: 3.45 ft at 6:45PM Jun 04, 2023Observed: 3.44 ft at 7:00PM Jun 04, 2023Observed: 3.44 ft at 7:15PM Jun 04, 2023Observed: 3.44 ft at 7:30PM Jun 04, 2023Observed: 3.44 ft at 7:45PM Jun 04, 2023Observed: 3.44 ft at 8:00PM Jun 04, 2023Observed: 3.44 ft at 8:15PM Jun 04, 2023Observed: 3.43 ft at 8:30PM Jun 04, 2023Observed: 3.43 ft at 8:45PM Jun 04, 2023Observed: 3.43 ft at 9:00PM Jun 04, 2023Observed: 3.42 ft at 9:15PM Jun 04, 2023Observed: 3.42 ft at 9:30PM Jun 04, 2023Observed: 3.42 ft at 9:45PM Jun 04, 2023Observed: 3.41 ft at 10:00PM Jun 04, 2023Observed: 3.41 ft at 10:15PM Jun 04, 2023Observed: 3.41 ft at 10:30PM Jun 04, 2023Observed: 3.4 ft at 10:45PM Jun 04, 2023Observed: 3.4 ft at 11:00PM Jun 04, 2023Observed: 3.39 ft at 11:15PM Jun 04, 2023Observed: 3.39 ft at 11:30PM Jun 04, 2023Observed: 3.39 ft at 11:45PM Jun 04, 2023Observed: 3.38 ft at 12:00AM Jun 05, 2023Observed: 3.38 ft at 12:15AM Jun 05, 2023Observed: 3.38 ft at 12:30AM Jun 05, 2023Observed: 3.37 ft at 12:45AM Jun 05, 2023Observed: 3.37 ft at 1:00AM Jun 05, 2023Observed: 3.37 ft at 1:15AM Jun 05, 2023Observed: 3.36 ft at 1:30AM Jun 05, 2023Observed: 3.36 ft at 1:45AM Jun 05, 2023Observed: 3.35 ft at 2:00AM Jun 05, 2023Observed: 3.35 ft at 2:15AM Jun 05, 2023Observed: 3.34 ft at 2:30AM Jun 05, 2023Observed: 3.34 ft at 2:45AM Jun 05, 2023Observed: 3.33 ft at 3:00AM Jun 05, 2023Observed: 3.33 ft at 3:15AM Jun 05, 2023Observed: 3.33 ft at 3:30AM Jun 05, 2023Observed: 3.32 ft at 3:45AM Jun 05, 2023Observed: 3.32 ft at 4:00AM Jun 05, 2023Observed: 3.31 ft at 4:15AM Jun 05, 2023Observed: 3.31 ft at 4:30AM Jun 05, 2023Observed: 3.3 ft at 4:45AM Jun 05, 2023Observed: 3.3 ft at 5:00AM Jun 05, 2023Observed: 3.29 ft at 5:15AM Jun 05, 2023Observed: 3.29 ft at 5:30AM Jun 05, 2023Observed: 3.28 ft at 5:45AM Jun 05, 2023Observed: 3.28 ft at 6:00AM Jun 05, 2023Observed: 3.28 ft at 6:15AM Jun 05, 2023Observed: 3.27 ft at 6:30AM Jun 05, 2023Observed: 3.27 ft at 6:45AM Jun 05, 2023Observed: 3.27 ft at 7:00AM Jun 05, 2023Observed: 3.27 ft at 7:15AM Jun 05, 2023Observed: 3.26 ft at 7:30AM Jun 05, 2023Highest Forecast: 2.9 ft 2:00PM Jun 05, 2023Forecast: 2.8 ft 8:00PM Jun 05, 2023Forecast: 2.7 ft 2:00AM Jun 06, 2023Forecast: 2.6 ft 8:00AM Jun 06, 2023Forecast: 2.5 ft 2:00PM Jun 06, 2023Forecast: 2.5 ft 8:00PM Jun 06, 2023Forecast: 2.5 ft 2:00AM Jun 07, 2023Forecast: 2.4 ft 8:00AM Jun 07, 2023USGS--Water Resources of the United StatesWLMM3(plotting HGIRG) Graph Created (8:46AM Jun 5, 2023)ObservedForecast (issued 11:20AM Jun 4)Latest observed value: 3.26 ft at 7:30 AM EDT 5-Jun-2023. Flood Stage is 7 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: Forecasts for the Shawsheen River at Wilmington are issued routinely year-round.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 10
Moderate Flood Stage: 8
Flood Stage: 7
Action Stage: 5
Low Stage (in feet): -9999

Historic Crests
(1) 10.54 ft on 03/16/2010
(2) 10.49 ft on 10/22/1996
(3) 9.87 ft on 03/23/2001
(4) 9.85 ft on 01/26/1979
(5) 9.42 ft on 03/31/2010
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 7.31 ft on 09/03/2021 (P)
(2) 7.17 ft on 01/26/2019
(3) 7.79 ft on 04/18/2018
(4) 7.25 ft on 12/11/2014
(5) 7.26 ft on 03/31/2014
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
11 Flooding will affect areas along the river from Wilmington to Lawrence. Some roads will become impassable including Route 114 near the I-495 interchange. Follow the advice of local officials, and evacuate if asked to do so. Do not drive into areas where water covers the Road. Basement flooding in low lying areas is likely and valuables should be moved to higher ground.
9 Flooding will affect areas along the river from Wilmington to Lawrence. Some roads will become impassable including Route 114 near the I-495 interchange. Follow the advice of local officials, and evacuate if asked to do so. Do not drive into areas where water covers the Road. Basement flooding in low lying areas is likely and valuables should be moved to higher ground.
8 Flooding will affect low lying neighborhoods from Wilmington through Tewksbury to Lawrence. This includes a portion of Route 114 in lawrence. Areas subject to basement flooding should move valuables to higher ground.
7.5 Flood waters will inundate a portion of Route 114 in Lawrence, and also affect low lying areas from Wilmington through Lawrence.
7 Flooding will affect low lying areas along the river from Wilmington through Lawrence.
About This Location Collapse

Latitude: 42.568149° N, Longitude: 71.215278° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 7 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 79.61 86.61 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 NULL NULL  

Current/Historical Observations:

Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 7 Day (NAEFS) 7 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Click individual graphics to enlarge.

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
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