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Hydrograph River at a Glance Download
Merrimack River at Lowell Stage (ft)Flow (kcfs)Observed: 42.68 ft at 5:00PM Nov 30, 2016Observed: 42.68 ft at 5:15PM Nov 30, 2016Observed: 42.68 ft at 5:30PM Nov 30, 2016Observed: 42.68 ft at 5:45PM Nov 30, 2016Observed: 42.68 ft at 6:00PM Nov 30, 2016Observed: 42.69 ft at 6:15PM Nov 30, 2016Observed: 42.69 ft at 6:30PM Nov 30, 2016Observed: 42.71 ft at 6:45PM Nov 30, 2016Observed: 42.74 ft at 7:00PM Nov 30, 2016Observed: 42.79 ft at 7:15PM Nov 30, 2016Observed: 42.82 ft at 7:30PM Nov 30, 2016Observed: 42.86 ft at 7:45PM Nov 30, 2016Observed: 42.89 ft at 8:00PM Nov 30, 2016Observed: 42.9 ft at 8:15PM Nov 30, 2016Observed: 42.91 ft at 8:30PM Nov 30, 2016Observed: 42.91 ft at 8:31PM Nov 30, 2016Observed: 42.92 ft at 8:45PM Nov 30, 2016Observed: 42.93 ft at 9:00PM Nov 30, 2016Observed: 42.93 ft at 9:15PM Nov 30, 2016Observed: 42.95 ft at 9:30PM Nov 30, 2016Observed: 42.96 ft at 9:45PM Nov 30, 2016Observed: 42.98 ft at 10:00PM Nov 30, 2016Observed: 42.98 ft at 10:15PM Nov 30, 2016Observed: 42.99 ft at 10:30PM Nov 30, 2016Observed: 43 ft at 10:45PM Nov 30, 2016Observed: 43.02 ft at 11:00PM Nov 30, 2016Observed: 43.03 ft at 11:15PM Nov 30, 2016Observed: 43.04 ft at 11:30PM Nov 30, 2016Observed: 43.05 ft at 11:45PM Nov 30, 2016Observed: 43.06 ft at 12:00AM Dec 01, 2016Observed: 43.06 ft at 12:15AM Dec 01, 2016Observed: 43.06 ft at 12:30AM Dec 01, 2016Observed: 43.06 ft at 12:45AM Dec 01, 2016Observed: 43.06 ft at 1:00AM Dec 01, 2016Observed: 43.06 ft at 1:15AM Dec 01, 2016Observed: 43.08 ft at 1:30AM Dec 01, 2016Observed: 43.09 ft at 1:45AM Dec 01, 2016Observed: 43.12 ft at 2:00AM Dec 01, 2016Observed: 43.14 ft at 2:15AM Dec 01, 2016Observed: 43.17 ft at 2:30AM Dec 01, 2016Observed: 43.17 ft at 2:31AM Dec 01, 2016Observed: 43.2 ft at 2:45AM Dec 01, 2016Observed: 43.22 ft at 3:00AM Dec 01, 2016Observed: 43.23 ft at 3:15AM Dec 01, 2016Observed: 43.25 ft at 3:30AM Dec 01, 2016Observed: 43.26 ft at 3:45AM Dec 01, 2016Observed: 43.27 ft at 4:00AM Dec 01, 2016Observed: 43.29 ft at 4:15AM Dec 01, 2016Observed: 43.29 ft at 4:30AM Dec 01, 2016Observed: 43.3 ft at 4:45AM Dec 01, 2016Observed: 43.31 ft at 5:00AM Dec 01, 2016Observed: 43.32 ft at 5:15AM Dec 01, 2016Observed: 43.32 ft at 5:30AM Dec 01, 2016Observed: 43.33 ft at 5:45AM Dec 01, 2016Observed: 43.34 ft at 6:00AM Dec 01, 2016Observed: 43.36 ft at 6:15AM Dec 01, 2016Observed: 43.38 ft at 6:30AM Dec 01, 2016Observed: 43.39 ft at 6:45AM Dec 01, 2016Observed: 43.4 ft at 7:00AM Dec 01, 2016Observed: 43.42 ft at 7:15AM Dec 01, 2016Observed: 43.43 ft at 7:30AM Dec 01, 2016Observed: 43.44 ft at 7:45AM Dec 01, 2016Observed: 43.45 ft at 8:00AM Dec 01, 2016Observed: 43.47 ft at 8:15AM Dec 01, 2016Observed: 43.49 ft at 8:30AM Dec 01, 2016Observed: 43.49 ft at 8:31AM Dec 01, 2016Observed: 43.5 ft at 8:45AM Dec 01, 2016Observed: 43.51 ft at 9:00AM Dec 01, 2016Observed: 43.51 ft at 9:15AM Dec 01, 2016Observed: 43.53 ft at 9:30AM Dec 01, 2016Observed: 43.54 ft at 9:45AM Dec 01, 2016Observed: 43.55 ft at 10:00AM Dec 01, 2016Observed: 43.57 ft at 10:15AM Dec 01, 2016Observed: 43.58 ft at 10:30AM Dec 01, 2016Observed: 43.58 ft at 10:45AM Dec 01, 2016Observed: 43.59 ft at 11:00AM Dec 01, 2016Observed: 43.6 ft at 11:15AM Dec 01, 2016Observed: 43.62 ft at 11:30AM Dec 01, 2016Observed: 43.65 ft at 11:45AM Dec 01, 2016Observed: 43.67 ft at 12:00PM Dec 01, 2016Observed: 43.69 ft at 12:15PM Dec 01, 2016Observed: 43.7 ft at 12:30PM Dec 01, 2016Observed: 43.72 ft at 12:45PM Dec 01, 2016Observed: 43.74 ft at 1:00PM Dec 01, 2016Observed: 43.76 ft at 1:15PM Dec 01, 2016Observed: 43.78 ft at 1:30PM Dec 01, 2016Observed: 43.8 ft at 1:45PM Dec 01, 2016Observed: 43.8 ft at 2:00PM Dec 01, 2016Observed: 43.8 ft at 2:15PM Dec 01, 2016Observed: 43.81 ft at 2:30PM Dec 01, 2016Observed: 43.81 ft at 2:31PM Dec 01, 2016Observed: 43.81 ft at 2:45PM Dec 01, 2016Observed: 43.82 ft at 3:00PM Dec 01, 2016Observed: 43.82 ft at 3:15PM Dec 01, 2016Observed: 43.83 ft at 3:30PM Dec 01, 2016Observed: 43.83 ft at 3:45PM Dec 01, 2016Observed: 43.82 ft at 4:00PM Dec 01, 2016Observed: 43.83 ft at 4:15PM Dec 01, 2016Observed: 43.88 ft at 4:30PM Dec 01, 2016Observed: 43.94 ft at 4:45PM Dec 01, 2016Observed: 43.97 ft at 5:00PM Dec 01, 2016Observed: 43.99 ft at 5:15PM Dec 01, 2016Observed: 44 ft at 5:30PM Dec 01, 2016Observed: 44 ft at 5:45PM Dec 01, 2016Observed: 44 ft at 6:00PM Dec 01, 2016Observed: 43.99 ft at 6:15PM Dec 01, 2016Observed: 43.99 ft at 6:30PM Dec 01, 2016Observed: 43.98 ft at 6:45PM Dec 01, 2016Observed: 43.98 ft at 7:00PM Dec 01, 2016Observed: 43.98 ft at 7:15PM Dec 01, 2016Observed: 43.99 ft at 7:30PM Dec 01, 2016Observed: 44 ft at 7:45PM Dec 01, 2016Observed: 44 ft at 8:00PM Dec 01, 2016Observed: 44 ft at 8:15PM Dec 01, 2016Observed: 44.01 ft at 8:30PM Dec 01, 2016Observed: 44.01 ft at 8:31PM Dec 01, 2016Observed: 44.01 ft at 8:45PM Dec 01, 2016Observed: 44.01 ft at 9:00PM Dec 01, 2016Observed: 44.01 ft at 9:15PM Dec 01, 2016Observed: 44.01 ft at 9:30PM Dec 01, 2016Observed: 44.01 ft at 9:45PM Dec 01, 2016Observed: 44.01 ft at 10:00PM Dec 01, 2016Observed: 44.02 ft at 10:15PM Dec 01, 2016Observed: 44.02 ft at 10:30PM Dec 01, 2016Observed: 44.02 ft at 10:45PM Dec 01, 2016Observed: 44.02 ft at 11:00PM Dec 01, 2016Observed: 44.02 ft at 11:15PM Dec 01, 2016Observed: 44.03 ft at 11:30PM Dec 01, 2016Observed: 44.03 ft at 11:45PM Dec 01, 2016Observed: 44.03 ft at 12:00AM Dec 02, 2016Observed: 44.03 ft at 12:15AM Dec 02, 2016Observed: 44.03 ft at 12:30AM Dec 02, 2016Observed: 44.03 ft at 12:45AM Dec 02, 2016Observed: 44.04 ft at 1:00AM Dec 02, 2016Observed: 44.04 ft at 1:15AM Dec 02, 2016Observed: 44.04 ft at 1:30AM Dec 02, 2016Observed: 44.04 ft at 1:45AM Dec 02, 2016Observed: 44.05 ft at 2:00AM Dec 02, 2016Observed: 44.05 ft at 2:15AM Dec 02, 2016Observed: 44.05 ft at 2:30AM Dec 02, 2016Observed: 44.05 ft at 2:31AM Dec 02, 2016Observed: 44.05 ft at 2:45AM Dec 02, 2016Observed: 44.06 ft at 3:00AM Dec 02, 2016Observed: 44.06 ft at 3:15AM Dec 02, 2016Observed: 44.07 ft at 3:30AM Dec 02, 2016Observed: 44.08 ft at 3:45AM Dec 02, 2016Observed: 44.08 ft at 4:00AM Dec 02, 2016Observed: 44.09 ft at 4:15AM Dec 02, 2016Observed: 44.1 ft at 4:30AM Dec 02, 2016Observed: 44.1 ft at 4:45AM Dec 02, 2016Observed: 44.11 ft at 5:00AM Dec 02, 2016Observed: 44.13 ft at 5:15AM Dec 02, 2016Observed: 44.14 ft at 5:30AM Dec 02, 2016Observed: 44.14 ft at 5:45AM Dec 02, 2016Observed: 44.16 ft at 6:00AM Dec 02, 2016Observed: 44.16 ft at 6:15AM Dec 02, 2016Observed: 44.18 ft at 6:30AM Dec 02, 2016Observed: 44.18 ft at 6:45AM Dec 02, 2016Observed: 44.19 ft at 7:00AM Dec 02, 2016Observed: 44.21 ft at 7:15AM Dec 02, 2016Observed: 44.22 ft at 7:30AM Dec 02, 2016Observed: 44.23 ft at 7:45AM Dec 02, 2016Observed: 44.24 ft at 8:00AM Dec 02, 2016Observed: 44.25 ft at 8:15AM Dec 02, 2016Observed: 44.26 ft at 8:30AM Dec 02, 2016Observed: 44.27 ft at 8:45AM Dec 02, 2016Observed: 44.28 ft at 9:00AM Dec 02, 2016Observed: 44.29 ft at 9:15AM Dec 02, 2016Observed: 44.3 ft at 9:30AM Dec 02, 2016Observed: 44.32 ft at 9:45AM Dec 02, 2016Observed: 44.33 ft at 10:00AM Dec 02, 2016Observed: 44.35 ft at 10:15AM Dec 02, 2016Observed: 44.36 ft at 10:30AM Dec 02, 2016Observed: 44.37 ft at 10:45AM Dec 02, 2016Observed: 44.38 ft at 11:00AM Dec 02, 2016Observed: 44.39 ft at 11:15AM Dec 02, 2016Observed: 44.4 ft at 11:30AM Dec 02, 2016Observed: 44.42 ft at 11:45AM Dec 02, 2016Observed: 44.43 ft at 12:00PM Dec 02, 2016Observed: 44.44 ft at 12:15PM Dec 02, 2016Observed: 44.45 ft at 12:30PM Dec 02, 2016Observed: 44.47 ft at 12:45PM Dec 02, 2016Observed: 44.48 ft at 1:00PM Dec 02, 2016Observed: 44.49 ft at 1:15PM Dec 02, 2016Observed: 44.5 ft at 1:30PM Dec 02, 2016Observed: 44.51 ft at 1:45PM Dec 02, 2016Observed: 44.53 ft at 2:00PM Dec 02, 2016Observed: 44.54 ft at 2:15PM Dec 02, 2016Observed: 44.57 ft at 2:30PM Dec 02, 2016Observed: 44.59 ft at 2:45PM Dec 02, 2016Observed: 44.63 ft at 3:00PM Dec 02, 2016Observed: 44.64 ft at 3:15PM Dec 02, 2016Observed: 44.66 ft at 3:30PM Dec 02, 2016Observed: 44.69 ft at 3:45PM Dec 02, 2016Observed: 44.7 ft at 4:00PM Dec 02, 2016Observed: 44.72 ft at 4:15PM Dec 02, 2016Observed: 44.74 ft at 4:30PM Dec 02, 2016Observed: 44.76 ft at 4:45PM Dec 02, 2016Observed: 44.77 ft at 5:00PM Dec 02, 2016Observed: 44.79 ft at 5:15PM Dec 02, 2016Observed: 44.81 ft at 5:30PM Dec 02, 2016Observed: 44.83 ft at 5:45PM Dec 02, 2016Observed: 44.84 ft at 6:00PM Dec 02, 2016Observed: 44.86 ft at 6:15PM Dec 02, 2016Observed: 44.87 ft at 6:30PM Dec 02, 2016Observed: 44.89 ft at 6:45PM Dec 02, 2016Observed: 44.9 ft at 7:00PM Dec 02, 2016Observed: 44.92 ft at 7:15PM Dec 02, 2016Observed: 44.93 ft at 7:30PM Dec 02, 2016Observed: 44.95 ft at 7:45PM Dec 02, 2016Observed: 44.95 ft at 8:00PM Dec 02, 2016Observed: 44.96 ft at 8:15PM Dec 02, 2016Observed: 44.96 ft at 8:30PM Dec 02, 2016Observed: 44.97 ft at 8:45PM Dec 02, 2016Observed: 44.98 ft at 9:00PM Dec 02, 2016Observed: 44.99 ft at 9:15PM Dec 02, 2016Observed: 44.99 ft at 9:30PM Dec 02, 2016Observed: 45 ft at 9:45PM Dec 02, 2016Observed: 45 ft at 10:00PM Dec 02, 2016Observed: 45 ft at 10:15PM Dec 02, 2016Highest Observation: 45.01 ft at 10:30PM Dec 02, 2016Observed: 45 ft at 10:45PM Dec 02, 2016Observed: 45 ft at 11:00PM Dec 02, 2016Observed: 45 ft at 11:15PM Dec 02, 2016Observed: 45 ft at 11:30PM Dec 02, 2016Observed: 45 ft at 11:45PM Dec 02, 2016Observed: 44.99 ft at 12:00AM Dec 03, 2016Observed: 45 ft at 12:15AM Dec 03, 2016Observed: 44.99 ft at 12:30AM Dec 03, 2016Observed: 44.98 ft at 12:45AM Dec 03, 2016Observed: 44.99 ft at 1:00AM Dec 03, 2016Observed: 44.99 ft at 1:15AM Dec 03, 2016Observed: 44.99 ft at 1:30AM Dec 03, 2016Observed: 44.99 ft at 1:45AM Dec 03, 2016Observed: 44.99 ft at 2:00AM Dec 03, 2016Observed: 44.98 ft at 2:15AM Dec 03, 2016Observed: 44.97 ft at 2:30AM Dec 03, 2016Observed: 44.97 ft at 2:31AM Dec 03, 2016Observed: 44.98 ft at 2:45AM Dec 03, 2016Observed: 44.98 ft at 3:00AM Dec 03, 2016Observed: 44.97 ft at 3:15AM Dec 03, 2016Observed: 44.97 ft at 3:30AM Dec 03, 2016Observed: 44.97 ft at 3:45AM Dec 03, 2016Observed: 44.97 ft at 4:00AM Dec 03, 2016Observed: 44.97 ft at 4:15AM Dec 03, 2016Observed: 44.96 ft at 4:30AM Dec 03, 2016Observed: 44.96 ft at 4:45AM Dec 03, 2016Observed: 44.96 ft at 5:00AM Dec 03, 2016Observed: 44.96 ft at 5:15AM Dec 03, 2016Observed: 44.96 ft at 5:30AM Dec 03, 2016Observed: 44.95 ft at 5:45AM Dec 03, 2016Observed: 44.95 ft at 6:00AM Dec 03, 2016Observed: 44.94 ft at 6:15AM Dec 03, 2016Observed: 44.94 ft at 6:30AM Dec 03, 2016Observed: 44.93 ft at 6:45AM Dec 03, 2016Observed: 44.93 ft at 7:00AM Dec 03, 2016Observed: 44.93 ft at 7:15AM Dec 03, 2016Observed: 44.92 ft at 7:30AM Dec 03, 2016Observed: 44.92 ft at 7:45AM Dec 03, 2016Observed: 44.91 ft at 8:00AM Dec 03, 2016Observed: 44.91 ft at 8:15AM Dec 03, 2016Observed: 44.91 ft at 8:30AM Dec 03, 2016Observed: 44.91 ft at 8:45AM Dec 03, 2016Observed: 44.91 ft at 9:00AM Dec 03, 2016Observed: 44.91 ft at 9:15AM Dec 03, 2016Observed: 44.91 ft at 9:30AM Dec 03, 2016Observed: 44.91 ft at 9:45AM Dec 03, 2016Observed: 44.91 ft at 10:00AM Dec 03, 2016Observed: 44.91 ft at 10:15AM Dec 03, 2016Observed: 44.92 ft at 10:30AM Dec 03, 2016Observed: 44.91 ft at 10:45AM Dec 03, 2016Observed: 44.9 ft at 11:00AM Dec 03, 2016Observed: 44.9 ft at 11:15AM Dec 03, 2016Observed: 44.9 ft at 11:30AM Dec 03, 2016Observed: 44.89 ft at 11:45AM Dec 03, 2016Observed: 44.89 ft at 12:00PM Dec 03, 2016Observed: 44.89 ft at 12:15PM Dec 03, 2016Observed: 44.88 ft at 12:30PM Dec 03, 2016Observed: 44.88 ft at 12:45PM Dec 03, 2016Observed: 44.88 ft at 1:00PM Dec 03, 2016Observed: 44.88 ft at 1:15PM Dec 03, 2016Observed: 44.88 ft at 1:30PM Dec 03, 2016Observed: 44.87 ft at 1:45PM Dec 03, 2016Observed: 44.87 ft at 2:00PM Dec 03, 2016Observed: 44.86 ft at 2:15PM Dec 03, 2016Observed: 44.86 ft at 2:30PM Dec 03, 2016Observed: 44.86 ft at 2:45PM Dec 03, 2016Observed: 44.86 ft at 2:46PM Dec 03, 2016Observed: 44.85 ft at 3:00PM Dec 03, 2016Observed: 44.84 ft at 3:15PM Dec 03, 2016Observed: 44.84 ft at 3:30PM Dec 03, 2016Highest Forecast: 44.8 ft 7:00PM Dec 03, 2016Highest Forecast: 44.8 ft 1:00AM Dec 04, 2016Forecast: 44.7 ft 7:00AM Dec 04, 2016Forecast: 44.6 ft 1:00PM Dec 04, 2016Forecast: 44.5 ft 7:00PM Dec 04, 2016Forecast: 44.4 ft 1:00AM Dec 05, 2016Forecast: 44.2 ft 7:00AM Dec 05, 2016Forecast: 44.1 ft 1:00PM Dec 05, 2016Forecast: 44 ft 7:00PM Dec 05, 2016Forecast: 43.9 ft 1:00AM Dec 06, 2016Forecast: 43.9 ft 7:00AM Dec 06, 2016USGS--Water Resources of the United StatesLOWM3(plotting HGIRG) Graph Created (4:45PM Dec 3, 2016)ObservedForecast (issued 11:02AM Dec 3)Latest observed value: 44.84 ft at 3:30 PM EST 3-Dec-2016. Flood Stage is 52 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts for the Merrimack River at Lowell are issued routinely year-round.
Return to Area Map
Upstream Gauge - at Nashua Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 58
Moderate Flood Stage: 54
Flood Stage: 52
Action Stage: 50
Low Stage (in feet): 0

Historic Crests
(1) 68.40 ft on 03/20/1936
(2) 60.60 ft on 04/23/1852
(3) 60.57 ft on 09/23/1938
(4) 58.84 ft on 05/15/2006
(5) 58.09 ft on 04/17/2007
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 54.64 ft on 04/01/2010
(2) 53.63 ft on 03/16/2010
(3) 58.09 ft on 04/17/2007
(4) 58.84 ft on 05/15/2006
(5) 52.77 ft on 04/04/2005
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
65 This is a serious flood event. All persons along the Merrimack River should follow the evacuation recommendations from your local emergency managemant officials. If asked to evacuate, do so immediately. All flood protection measures must be rushed to completion in flood prone areas.
62 This is a serious flood event. All persons along the Merrimack River should follow the evacuation recommendations from your local emergency managemant officials. If asked to evacuate, do so immediately. All flood protection measures must be rushed to completion in flood prone areas.
60 This is a serious flood event. All persons along the Merrimack River from the Massachusetts border through Methuen should follow the evacuation recommendations from your local emergency managemant officials. If asked to evacuate, do so immediately. All flood protection measures must be rushed to completion in flood prone areas.
58 Flooding is expected to overspread portions of Route 113 above Pawtucket Falls. Also, portions of Route 110 and several homes and businesses along Route 110 heading north and east into Tewksbury may begin to experience flooding. Follow the direction of your local emergency management officals. If asked to evacuate, do so immediately.
56 Flooding will become more widespread from the New Hampshire border through Methuen. Those areas outside local flood protection should take measures to protect property. Follow the directions of your local emergency management agency.
55 Flooding will become more widespread from the New Hampshire border through Methuen. Those areas outside local flood protection should take measures to protect property. Follow the directions of your local emergency management agency.
52 Lowland flooding is likely along the Merrimack River. Most of the impact will be felt by businesses and mills where basement flooding is likely.
About This Location Collapse

Latitude: 42.645925° N, Longitude: 71.298394° W, Horizontal Datum: NAD27

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 52 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 5.18 57.18 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
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

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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Taunton, MA 02780
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Page last modified: 13-Aug-2015 1:57 AM
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