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ALERT: Update on status of the nationwide data transmission error that prevents stream gauge data collected at affected locations from being displayed on the Advanced Hydrologic Prediction Services (AHPS) webpages. The USGS has restored the transmission from all of their gauges or has placed them in a seasonal outage (some Alaska gauges). There are a few USGS gauges that the NWS is not yet receiving the new transmissions and NWS is working to get that data by alternate means. A map of the status of USGS gauges is here. The status map of gauge outages from other agencies is here. The situation has greatly improved and will continue to improve but at a slower pace. The outage maps will now be updated once per week on Thursday. We apologize for the service interruption and hope to have the data restored as soon as possible.



Hydrograph River at a Glance Download
Assabet River at Maynard Stage (ft)Flow (kcfs)Observed: 4.46 ft at 3:00PM Nov 11, 2018Observed: 4.47 ft at 3:15PM Nov 11, 2018Observed: 4.47 ft at 3:30PM Nov 11, 2018Observed: 4.47 ft at 3:45PM Nov 11, 2018Observed: 4.46 ft at 4:00PM Nov 11, 2018Observed: 4.46 ft at 4:15PM Nov 11, 2018Observed: 4.45 ft at 4:30PM Nov 11, 2018Observed: 4.46 ft at 4:45PM Nov 11, 2018Observed: 4.46 ft at 5:00PM Nov 11, 2018Observed: 4.45 ft at 5:15PM Nov 11, 2018Observed: 4.45 ft at 5:30PM Nov 11, 2018Observed: 4.45 ft at 5:45PM Nov 11, 2018Observed: 4.45 ft at 6:00PM Nov 11, 2018Observed: 4.46 ft at 6:15PM Nov 11, 2018Observed: 4.44 ft at 6:30PM Nov 11, 2018Observed: 4.44 ft at 6:45PM Nov 11, 2018Observed: 4.44 ft at 7:00PM Nov 11, 2018Observed: 4.45 ft at 7:15PM Nov 11, 2018Observed: 4.45 ft at 7:30PM Nov 11, 2018Observed: 4.45 ft at 7:45PM Nov 11, 2018Observed: 4.44 ft at 8:00PM Nov 11, 2018Observed: 4.44 ft at 8:15PM Nov 11, 2018Observed: 4.45 ft at 8:30PM Nov 11, 2018Observed: 4.44 ft at 8:45PM Nov 11, 2018Observed: 4.43 ft at 9:00PM Nov 11, 2018Observed: 4.45 ft at 9:15PM Nov 11, 2018Observed: 4.44 ft at 9:30PM Nov 11, 2018Observed: 4.43 ft at 9:45PM Nov 11, 2018Observed: 4.44 ft at 10:00PM Nov 11, 2018Observed: 4.44 ft at 10:15PM Nov 11, 2018Observed: 4.43 ft at 10:30PM Nov 11, 2018Observed: 4.43 ft at 10:45PM Nov 11, 2018Observed: 4.45 ft at 11:00PM Nov 11, 2018Observed: 4.44 ft at 11:15PM Nov 11, 2018Observed: 4.42 ft at 11:30PM Nov 11, 2018Observed: 4.42 ft at 11:45PM Nov 11, 2018Observed: 4.43 ft at 12:00AM Nov 12, 2018Observed: 4.44 ft at 12:15AM Nov 12, 2018Observed: 4.42 ft at 12:30AM Nov 12, 2018Observed: 4.42 ft at 12:45AM Nov 12, 2018Observed: 4.42 ft at 1:00AM Nov 12, 2018Observed: 4.43 ft at 1:15AM Nov 12, 2018Observed: 4.41 ft at 1:30AM Nov 12, 2018Observed: 4.42 ft at 1:45AM Nov 12, 2018Observed: 4.4 ft at 2:00AM Nov 12, 2018Observed: 4.4 ft at 2:15AM Nov 12, 2018Observed: 4.41 ft at 2:30AM Nov 12, 2018Observed: 4.41 ft at 2:45AM Nov 12, 2018Observed: 4.41 ft at 3:00AM Nov 12, 2018Observed: 4.39 ft at 3:15AM Nov 12, 2018Observed: 4.4 ft at 3:30AM Nov 12, 2018Observed: 4.38 ft at 3:45AM Nov 12, 2018Observed: 4.39 ft at 4:00AM Nov 12, 2018Observed: 4.39 ft at 4:15AM Nov 12, 2018Observed: 4.38 ft at 4:30AM Nov 12, 2018Observed: 4.38 ft at 4:45AM Nov 12, 2018Observed: 4.38 ft at 5:00AM Nov 12, 2018Observed: 4.37 ft at 5:15AM Nov 12, 2018Observed: 4.37 ft at 5:30AM Nov 12, 2018Observed: 4.38 ft at 5:45AM Nov 12, 2018Observed: 4.36 ft at 6:00AM Nov 12, 2018Observed: 4.37 ft at 6:15AM Nov 12, 2018Observed: 4.36 ft at 6:30AM Nov 12, 2018Observed: 4.37 ft at 6:45AM Nov 12, 2018Observed: 4.37 ft at 7:00AM Nov 12, 2018Observed: 4.35 ft at 7:15AM Nov 12, 2018Observed: 4.36 ft at 7:30AM Nov 12, 2018Observed: 4.34 ft at 7:45AM Nov 12, 2018Observed: 4.34 ft at 8:00AM Nov 12, 2018Observed: 4.34 ft at 8:15AM Nov 12, 2018Observed: 4.34 ft at 8:30AM Nov 12, 2018Observed: 4.35 ft at 8:45AM Nov 12, 2018Observed: 4.34 ft at 9:00AM Nov 12, 2018Observed: 4.34 ft at 9:15AM Nov 12, 2018Observed: 4.34 ft at 9:30AM Nov 12, 2018Observed: 4.33 ft at 9:45AM Nov 12, 2018Observed: 4.33 ft at 10:00AM Nov 12, 2018Observed: 4.33 ft at 10:15AM Nov 12, 2018Observed: 4.32 ft at 10:30AM Nov 12, 2018Observed: 4.34 ft at 10:45AM Nov 12, 2018Observed: 4.32 ft at 11:00AM Nov 12, 2018Observed: 4.33 ft at 11:15AM Nov 12, 2018Observed: 4.33 ft at 11:30AM Nov 12, 2018Observed: 4.32 ft at 11:45AM Nov 12, 2018Observed: 4.32 ft at 12:00PM Nov 12, 2018Observed: 4.31 ft at 12:15PM Nov 12, 2018Observed: 4.32 ft at 12:30PM Nov 12, 2018Observed: 4.31 ft at 12:45PM Nov 12, 2018Observed: 4.31 ft at 1:00PM Nov 12, 2018Observed: 4.3 ft at 1:15PM Nov 12, 2018Observed: 4.3 ft at 1:30PM Nov 12, 2018Observed: 4.3 ft at 1:45PM Nov 12, 2018Observed: 4.29 ft at 2:00PM Nov 12, 2018Observed: 4.29 ft at 2:15PM Nov 12, 2018Observed: 4.3 ft at 2:30PM Nov 12, 2018Observed: 4.29 ft at 2:45PM Nov 12, 2018Observed: 4.28 ft at 3:00PM Nov 12, 2018Observed: 4.28 ft at 3:15PM Nov 12, 2018Observed: 4.28 ft at 3:30PM Nov 12, 2018Observed: 4.26 ft at 3:45PM Nov 12, 2018Observed: 4.27 ft at 4:00PM Nov 12, 2018Observed: 4.27 ft at 4:15PM Nov 12, 2018Observed: 4.26 ft at 4:30PM Nov 12, 2018Observed: 4.26 ft at 4:45PM Nov 12, 2018Observed: 4.26 ft at 5:00PM Nov 12, 2018Observed: 4.25 ft at 5:15PM Nov 12, 2018Observed: 4.25 ft at 5:30PM Nov 12, 2018Observed: 4.25 ft at 5:45PM Nov 12, 2018Observed: 4.24 ft at 6:00PM Nov 12, 2018Observed: 4.24 ft at 6:15PM Nov 12, 2018Observed: 4.25 ft at 6:30PM Nov 12, 2018Observed: 4.23 ft at 6:45PM Nov 12, 2018Observed: 4.23 ft at 7:00PM Nov 12, 2018Observed: 4.23 ft at 7:15PM Nov 12, 2018Observed: 4.24 ft at 7:30PM Nov 12, 2018Observed: 4.23 ft at 7:45PM Nov 12, 2018Observed: 4.23 ft at 8:00PM Nov 12, 2018Observed: 4.23 ft at 8:15PM Nov 12, 2018Observed: 4.23 ft at 8:30PM Nov 12, 2018Observed: 4.21 ft at 8:45PM Nov 12, 2018Observed: 4.21 ft at 9:00PM Nov 12, 2018Observed: 4.21 ft at 9:15PM Nov 12, 2018Observed: 4.22 ft at 9:30PM Nov 12, 2018Observed: 4.21 ft at 9:45PM Nov 12, 2018Observed: 4.2 ft at 10:00PM Nov 12, 2018Observed: 4.2 ft at 10:15PM Nov 12, 2018Observed: 4.2 ft at 10:30PM Nov 12, 2018Observed: 4.19 ft at 10:45PM Nov 12, 2018Observed: 4.2 ft at 11:00PM Nov 12, 2018Observed: 4.2 ft at 11:15PM Nov 12, 2018Observed: 4.2 ft at 11:30PM Nov 12, 2018Observed: 4.19 ft at 11:45PM Nov 12, 2018Observed: 4.19 ft at 12:00AM Nov 13, 2018Observed: 4.18 ft at 12:15AM Nov 13, 2018Observed: 4.18 ft at 12:30AM Nov 13, 2018Observed: 4.18 ft at 12:45AM Nov 13, 2018Observed: 4.17 ft at 1:00AM Nov 13, 2018Observed: 4.17 ft at 1:15AM Nov 13, 2018Observed: 4.16 ft at 1:30AM Nov 13, 2018Observed: 4.18 ft at 1:45AM Nov 13, 2018Observed: 4.17 ft at 2:00AM Nov 13, 2018Observed: 4.18 ft at 2:15AM Nov 13, 2018Observed: 4.18 ft at 2:30AM Nov 13, 2018Observed: 4.17 ft at 2:45AM Nov 13, 2018Observed: 4.17 ft at 3:00AM Nov 13, 2018Observed: 4.17 ft at 3:15AM Nov 13, 2018Observed: 4.18 ft at 3:30AM Nov 13, 2018Observed: 4.17 ft at 3:45AM Nov 13, 2018Observed: 4.18 ft at 4:00AM Nov 13, 2018Observed: 4.19 ft at 4:15AM Nov 13, 2018Observed: 4.2 ft at 4:30AM Nov 13, 2018Observed: 4.19 ft at 4:45AM Nov 13, 2018Observed: 4.18 ft at 5:00AM Nov 13, 2018Observed: 4.19 ft at 5:15AM Nov 13, 2018Observed: 4.19 ft at 5:30AM Nov 13, 2018Observed: 4.2 ft at 5:45AM Nov 13, 2018Observed: 4.21 ft at 6:00AM Nov 13, 2018Observed: 4.22 ft at 6:15AM Nov 13, 2018Observed: 4.22 ft at 6:30AM Nov 13, 2018Observed: 4.22 ft at 6:45AM Nov 13, 2018Observed: 4.22 ft at 7:00AM Nov 13, 2018Observed: 4.23 ft at 7:15AM Nov 13, 2018Observed: 4.24 ft at 7:30AM Nov 13, 2018Observed: 4.24 ft at 7:45AM Nov 13, 2018Observed: 4.24 ft at 8:00AM Nov 13, 2018Observed: 4.24 ft at 8:15AM Nov 13, 2018Observed: 4.24 ft at 8:30AM Nov 13, 2018Observed: 4.24 ft at 8:45AM Nov 13, 2018Observed: 4.25 ft at 9:00AM Nov 13, 2018Observed: 4.26 ft at 9:15AM Nov 13, 2018Observed: 4.25 ft at 9:30AM Nov 13, 2018Observed: 4.26 ft at 9:45AM Nov 13, 2018Observed: 4.26 ft at 10:00AM Nov 13, 2018Observed: 4.28 ft at 10:15AM Nov 13, 2018Observed: 4.28 ft at 10:30AM Nov 13, 2018Observed: 4.3 ft at 10:45AM Nov 13, 2018Observed: 4.32 ft at 11:00AM Nov 13, 2018Observed: 4.32 ft at 11:15AM Nov 13, 2018Observed: 4.35 ft at 11:30AM Nov 13, 2018Observed: 4.34 ft at 11:45AM Nov 13, 2018Observed: 4.35 ft at 12:00PM Nov 13, 2018Observed: 4.34 ft at 12:15PM Nov 13, 2018Observed: 4.34 ft at 12:30PM Nov 13, 2018Observed: 4.34 ft at 12:45PM Nov 13, 2018Observed: 4.32 ft at 1:00PM Nov 13, 2018Observed: 4.35 ft at 1:15PM Nov 13, 2018Observed: 4.35 ft at 1:30PM Nov 13, 2018Observed: 4.36 ft at 1:45PM Nov 13, 2018Observed: 4.36 ft at 2:00PM Nov 13, 2018Observed: 4.36 ft at 2:15PM Nov 13, 2018Observed: 4.36 ft at 2:30PM Nov 13, 2018Observed: 4.37 ft at 2:45PM Nov 13, 2018Observed: 4.37 ft at 3:00PM Nov 13, 2018Observed: 4.37 ft at 3:15PM Nov 13, 2018Observed: 4.39 ft at 3:30PM Nov 13, 2018Observed: 4.39 ft at 3:45PM Nov 13, 2018Observed: 4.39 ft at 4:00PM Nov 13, 2018Observed: 4.39 ft at 4:15PM Nov 13, 2018Observed: 4.41 ft at 4:30PM Nov 13, 2018Observed: 4.4 ft at 4:45PM Nov 13, 2018Observed: 4.43 ft at 5:00PM Nov 13, 2018Observed: 4.41 ft at 5:15PM Nov 13, 2018Observed: 4.44 ft at 5:30PM Nov 13, 2018Observed: 4.46 ft at 5:45PM Nov 13, 2018Observed: 4.46 ft at 6:00PM Nov 13, 2018Observed: 4.45 ft at 6:15PM Nov 13, 2018Observed: 4.46 ft at 6:30PM Nov 13, 2018Observed: 4.45 ft at 6:45PM Nov 13, 2018Observed: 4.46 ft at 7:00PM Nov 13, 2018Observed: 4.47 ft at 7:15PM Nov 13, 2018Observed: 4.48 ft at 7:30PM Nov 13, 2018Observed: 4.49 ft at 7:45PM Nov 13, 2018Observed: 4.5 ft at 8:00PM Nov 13, 2018Observed: 4.49 ft at 8:15PM Nov 13, 2018Observed: 4.5 ft at 8:30PM Nov 13, 2018Observed: 4.5 ft at 8:45PM Nov 13, 2018Observed: 4.5 ft at 9:00PM Nov 13, 2018Observed: 4.51 ft at 9:15PM Nov 13, 2018Observed: 4.51 ft at 9:30PM Nov 13, 2018Observed: 4.52 ft at 9:45PM Nov 13, 2018Observed: 4.53 ft at 10:00PM Nov 13, 2018Observed: 4.54 ft at 10:15PM Nov 13, 2018Observed: 4.54 ft at 10:30PM Nov 13, 2018Observed: 4.55 ft at 10:45PM Nov 13, 2018Observed: 4.56 ft at 11:00PM Nov 13, 2018Observed: 4.55 ft at 11:15PM Nov 13, 2018Observed: 4.56 ft at 11:30PM Nov 13, 2018Observed: 4.56 ft at 11:45PM Nov 13, 2018Observed: 4.56 ft at 12:00AM Nov 14, 2018Observed: 4.56 ft at 12:15AM Nov 14, 2018Observed: 4.56 ft at 12:30AM Nov 14, 2018Observed: 4.57 ft at 12:45AM Nov 14, 2018Observed: 4.58 ft at 1:00AM Nov 14, 2018Observed: 4.59 ft at 1:15AM Nov 14, 2018Observed: 4.59 ft at 1:30AM Nov 14, 2018Observed: 4.59 ft at 1:45AM Nov 14, 2018Observed: 4.59 ft at 2:00AM Nov 14, 2018Observed: 4.58 ft at 2:15AM Nov 14, 2018Observed: 4.58 ft at 2:30AM Nov 14, 2018Observed: 4.59 ft at 2:45AM Nov 14, 2018Observed: 4.59 ft at 3:00AM Nov 14, 2018Observed: 4.59 ft at 3:15AM Nov 14, 2018Observed: 4.59 ft at 3:30AM Nov 14, 2018Observed: 4.59 ft at 3:45AM Nov 14, 2018Observed: 4.61 ft at 4:00AM Nov 14, 2018Observed: 4.6 ft at 4:15AM Nov 14, 2018Observed: 4.62 ft at 4:30AM Nov 14, 2018Observed: 4.6 ft at 4:45AM Nov 14, 2018Observed: 4.61 ft at 5:00AM Nov 14, 2018Observed: 4.61 ft at 5:15AM Nov 14, 2018Observed: 4.6 ft at 5:30AM Nov 14, 2018Observed: 4.63 ft at 5:45AM Nov 14, 2018Observed: 4.63 ft at 6:00AM Nov 14, 2018Observed: 4.62 ft at 6:15AM Nov 14, 2018Observed: 4.63 ft at 6:30AM Nov 14, 2018Observed: 4.63 ft at 6:45AM Nov 14, 2018Observed: 4.63 ft at 7:00AM Nov 14, 2018Observed: 4.64 ft at 7:15AM Nov 14, 2018Observed: 4.63 ft at 7:30AM Nov 14, 2018Observed: 4.63 ft at 7:45AM Nov 14, 2018Observed: 4.64 ft at 8:00AM Nov 14, 2018Observed: 4.64 ft at 8:15AM Nov 14, 2018Observed: 4.64 ft at 8:30AM Nov 14, 2018Observed: 4.66 ft at 8:45AM Nov 14, 2018Observed: 4.65 ft at 9:00AM Nov 14, 2018Observed: 4.66 ft at 9:15AM Nov 14, 2018Observed: 4.68 ft at 9:30AM Nov 14, 2018Observed: 4.66 ft at 9:45AM Nov 14, 2018Observed: 4.67 ft at 10:00AM Nov 14, 2018Observed: 4.67 ft at 10:15AM Nov 14, 2018Observed: 4.69 ft at 10:30AM Nov 14, 2018Observed: 4.69 ft at 10:45AM Nov 14, 2018Observed: 4.68 ft at 11:00AM Nov 14, 2018Observed: 4.68 ft at 11:15AM Nov 14, 2018Observed: 4.68 ft at 11:30AM Nov 14, 2018Observed: 4.69 ft at 11:45AM Nov 14, 2018Observed: 4.68 ft at 12:00PM Nov 14, 2018Observed: 4.69 ft at 12:15PM Nov 14, 2018Observed: 4.67 ft at 12:30PM Nov 14, 2018Observed: 4.68 ft at 12:45PM Nov 14, 2018Observed: 4.67 ft at 1:00PM Nov 14, 2018Observed: 4.68 ft at 1:15PM Nov 14, 2018Observed: 4.69 ft at 1:30PM Nov 14, 2018Highest Observation: 4.71 ft at 1:45PM Nov 14, 2018Observed: 4.7 ft at 2:00PM Nov 14, 2018Observed: 4.69 ft at 2:15PM Nov 14, 2018Forecast: 4.8 ft 7:00PM Nov 14, 2018Highest Forecast: 4.9 ft 1:00AM Nov 15, 2018Highest Forecast: 4.9 ft 7:00AM Nov 15, 2018Forecast: 4.8 ft 1:00PM Nov 15, 2018Forecast: 4.7 ft 7:00PM Nov 15, 2018Forecast: 4.6 ft 1:00AM Nov 16, 2018Forecast: 4.5 ft 7:00AM Nov 16, 2018Forecast: 4.5 ft 1:00PM Nov 16, 2018Forecast: 4.5 ft 7:00PM Nov 16, 2018Forecast: 4.4 ft 1:00AM Nov 17, 2018Forecast: 4.4 ft 7:00AM Nov 17, 2018USGS--Water Resources of the United StatesMAYM3(plotting HGIRG) Graph Created (2:45PM Nov 14, 2018)ObservedForecast (issued 11:14AM Nov 14)Latest observed value: 4.69 ft at 2:15 PM EST 14-Nov-2018. Flood Stage is 5 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EST)
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): -9999

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) 5.20 ft on 04/08/2017
(2) 5.17 ft on 06/15/2013
(3) 5.09 ft on 03/13/2011
(4) 5.56 ft on 03/08/2011
(5) 7.08 ft on 03/31/2010
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:

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
National Weather Service
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(508) 622-3250
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Page last modified: 21-Dec-2016 10:38 PM
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