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Hydrograph River at a Glance Download
Smith River  (NH) at Bristol Stage (ft)Flow (kcfs)Observed: 4.25 ft at 5:45AM Jul 30, 2021Observed: 4.24 ft at 6:00AM Jul 30, 2021Observed: 4.22 ft at 6:15AM Jul 30, 2021Observed: 4.2 ft at 6:30AM Jul 30, 2021Observed: 4.2 ft at 6:45AM Jul 30, 2021Observed: 4.18 ft at 7:00AM Jul 30, 2021Observed: 4.18 ft at 7:15AM Jul 30, 2021Observed: 4.17 ft at 7:30AM Jul 30, 2021Observed: 4.17 ft at 7:45AM Jul 30, 2021Observed: 4.17 ft at 8:00AM Jul 30, 2021Observed: 4.17 ft at 8:15AM Jul 30, 2021Observed: 4.17 ft at 8:30AM Jul 30, 2021Observed: 4.17 ft at 8:45AM Jul 30, 2021Observed: 4.18 ft at 9:00AM Jul 30, 2021Observed: 4.18 ft at 9:15AM Jul 30, 2021Observed: 4.19 ft at 9:30AM Jul 30, 2021Observed: 4.2 ft at 9:45AM Jul 30, 2021Observed: 4.21 ft at 10:00AM Jul 30, 2021Observed: 4.22 ft at 10:15AM Jul 30, 2021Observed: 4.23 ft at 10:30AM Jul 30, 2021Observed: 4.24 ft at 10:45AM Jul 30, 2021Observed: 4.25 ft at 11:00AM Jul 30, 2021Observed: 4.26 ft at 11:15AM Jul 30, 2021Observed: 4.28 ft at 11:30AM Jul 30, 2021Observed: 4.29 ft at 11:45AM Jul 30, 2021Observed: 4.3 ft at 12:00PM Jul 30, 2021Observed: 4.31 ft at 12:15PM Jul 30, 2021Observed: 4.32 ft at 12:30PM Jul 30, 2021Observed: 4.33 ft at 12:45PM Jul 30, 2021Observed: 4.34 ft at 1:00PM Jul 30, 2021Observed: 4.35 ft at 1:15PM Jul 30, 2021Observed: 4.36 ft at 1:30PM Jul 30, 2021Observed: 4.36 ft at 1:45PM Jul 30, 2021Observed: 4.37 ft at 2:00PM Jul 30, 2021Observed: 4.38 ft at 2:15PM Jul 30, 2021Observed: 4.38 ft at 2:30PM Jul 30, 2021Observed: 4.39 ft at 2:45PM Jul 30, 2021Observed: 4.39 ft at 2:46PM Jul 30, 2021Observed: 4.39 ft at 3:00PM Jul 30, 2021Observed: 4.4 ft at 3:15PM Jul 30, 2021Observed: 4.41 ft at 3:30PM Jul 30, 2021Observed: 4.41 ft at 3:45PM Jul 30, 2021Observed: 4.41 ft at 4:00PM Jul 30, 2021Observed: 4.42 ft at 4:15PM Jul 30, 2021Observed: 4.42 ft at 4:30PM Jul 30, 2021Observed: 4.43 ft at 4:45PM Jul 30, 2021Observed: 4.43 ft at 5:00PM Jul 30, 2021Observed: 4.43 ft at 5:15PM Jul 30, 2021Observed: 4.43 ft at 5:30PM Jul 30, 2021Observed: 4.44 ft at 5:45PM Jul 30, 2021Observed: 4.44 ft at 6:00PM Jul 30, 2021Observed: 4.45 ft at 6:15PM Jul 30, 2021Observed: 4.45 ft at 6:30PM Jul 30, 2021Observed: 4.45 ft at 6:45PM Jul 30, 2021Observed: 4.45 ft at 7:00PM Jul 30, 2021Observed: 4.45 ft at 7:15PM Jul 30, 2021Observed: 4.45 ft at 7:30PM Jul 30, 2021Observed: 4.45 ft at 7:45PM Jul 30, 2021Observed: 4.45 ft at 8:00PM Jul 30, 2021Observed: 4.45 ft at 8:15PM Jul 30, 2021Observed: 4.45 ft at 8:30PM Jul 30, 2021Observed: 4.45 ft at 8:45PM Jul 30, 2021Observed: 4.45 ft at 8:46PM Jul 30, 2021Observed: 4.45 ft at 9:00PM Jul 30, 2021Observed: 4.45 ft at 9:15PM Jul 30, 2021Observed: 4.45 ft at 9:30PM Jul 30, 2021Observed: 4.45 ft at 9:45PM Jul 30, 2021Observed: 4.45 ft at 10:00PM Jul 30, 2021Observed: 4.45 ft at 10:15PM Jul 30, 2021Observed: 4.45 ft at 10:30PM Jul 30, 2021Observed: 4.45 ft at 10:45PM Jul 30, 2021Observed: 4.45 ft at 11:00PM Jul 30, 2021Observed: 4.44 ft at 11:15PM Jul 30, 2021Observed: 4.44 ft at 11:30PM Jul 30, 2021Observed: 4.44 ft at 11:45PM Jul 30, 2021Observed: 4.44 ft at 12:00AM Jul 31, 2021Observed: 4.44 ft at 12:15AM Jul 31, 2021Observed: 4.43 ft at 12:30AM Jul 31, 2021Observed: 4.43 ft at 12:45AM Jul 31, 2021Observed: 4.42 ft at 1:00AM Jul 31, 2021Observed: 4.42 ft at 1:15AM Jul 31, 2021Observed: 4.42 ft at 1:30AM Jul 31, 2021Observed: 4.41 ft at 1:45AM Jul 31, 2021Observed: 4.41 ft at 2:00AM Jul 31, 2021Observed: 4.41 ft at 2:15AM Jul 31, 2021Observed: 4.4 ft at 2:30AM Jul 31, 2021Observed: 4.4 ft at 2:45AM Jul 31, 2021Observed: 4.4 ft at 3:00AM Jul 31, 2021Observed: 4.39 ft at 3:15AM Jul 31, 2021Observed: 4.39 ft at 3:30AM Jul 31, 2021Observed: 4.38 ft at 3:45AM Jul 31, 2021Observed: 4.38 ft at 4:00AM Jul 31, 2021Observed: 4.38 ft at 4:15AM Jul 31, 2021Observed: 4.37 ft at 4:30AM Jul 31, 2021Observed: 4.36 ft at 4:45AM Jul 31, 2021Observed: 4.36 ft at 5:00AM Jul 31, 2021Observed: 4.35 ft at 5:15AM Jul 31, 2021Observed: 4.35 ft at 5:30AM Jul 31, 2021Observed: 4.34 ft at 5:45AM Jul 31, 2021Observed: 4.34 ft at 6:00AM Jul 31, 2021Observed: 4.33 ft at 6:15AM Jul 31, 2021Observed: 4.32 ft at 6:30AM Jul 31, 2021Observed: 4.32 ft at 6:45AM Jul 31, 2021Observed: 4.31 ft at 7:00AM Jul 31, 2021Observed: 4.31 ft at 7:15AM Jul 31, 2021Observed: 4.3 ft at 7:30AM Jul 31, 2021Observed: 4.29 ft at 7:45AM Jul 31, 2021Observed: 4.28 ft at 8:00AM Jul 31, 2021Observed: 4.28 ft at 8:15AM Jul 31, 2021Observed: 4.27 ft at 8:30AM Jul 31, 2021Observed: 4.26 ft at 8:45AM Jul 31, 2021Observed: 4.26 ft at 8:46AM Jul 31, 2021Observed: 4.25 ft at 9:00AM Jul 31, 2021Observed: 4.24 ft at 9:15AM Jul 31, 2021Observed: 4.24 ft at 9:30AM Jul 31, 2021Observed: 4.23 ft at 9:45AM Jul 31, 2021Observed: 4.22 ft at 10:00AM Jul 31, 2021Observed: 4.22 ft at 10:15AM Jul 31, 2021Observed: 4.21 ft at 10:30AM Jul 31, 2021Observed: 4.2 ft at 10:45AM Jul 31, 2021Observed: 4.19 ft at 11:00AM Jul 31, 2021Observed: 4.18 ft at 11:15AM Jul 31, 2021Observed: 4.18 ft at 11:30AM Jul 31, 2021Observed: 4.17 ft at 11:45AM Jul 31, 2021Observed: 4.16 ft at 12:00PM Jul 31, 2021Observed: 4.15 ft at 12:15PM Jul 31, 2021Observed: 4.14 ft at 12:30PM Jul 31, 2021Observed: 4.13 ft at 12:45PM Jul 31, 2021Observed: 4.12 ft at 1:00PM Jul 31, 2021Observed: 4.12 ft at 1:15PM Jul 31, 2021Observed: 4.1 ft at 1:30PM Jul 31, 2021Observed: 4.1 ft at 1:45PM Jul 31, 2021Observed: 4.09 ft at 2:00PM Jul 31, 2021Observed: 4.08 ft at 2:15PM Jul 31, 2021Observed: 4.07 ft at 2:30PM Jul 31, 2021Observed: 4.06 ft at 2:45PM Jul 31, 2021Observed: 4.06 ft at 2:46PM Jul 31, 2021Observed: 4.05 ft at 3:00PM Jul 31, 2021Observed: 4.04 ft at 3:15PM Jul 31, 2021Observed: 4.04 ft at 3:30PM Jul 31, 2021Observed: 4.02 ft at 3:45PM Jul 31, 2021Observed: 4.02 ft at 4:00PM Jul 31, 2021Observed: 4.01 ft at 4:15PM Jul 31, 2021Observed: 4 ft at 4:30PM Jul 31, 2021Observed: 3.99 ft at 4:45PM Jul 31, 2021Observed: 3.98 ft at 5:00PM Jul 31, 2021Observed: 3.97 ft at 5:15PM Jul 31, 2021Observed: 3.96 ft at 5:30PM Jul 31, 2021Observed: 3.95 ft at 5:45PM Jul 31, 2021Observed: 3.94 ft at 6:00PM Jul 31, 2021Observed: 3.94 ft at 6:15PM Jul 31, 2021Observed: 3.93 ft at 6:30PM Jul 31, 2021Observed: 3.92 ft at 6:45PM Jul 31, 2021Observed: 3.91 ft at 7:00PM Jul 31, 2021Observed: 3.9 ft at 7:15PM Jul 31, 2021Observed: 3.9 ft at 7:30PM Jul 31, 2021Observed: 3.88 ft at 7:45PM Jul 31, 2021Observed: 3.88 ft at 8:00PM Jul 31, 2021Observed: 3.87 ft at 8:15PM Jul 31, 2021Observed: 3.86 ft at 8:30PM Jul 31, 2021Observed: 3.85 ft at 8:45PM Jul 31, 2021Observed: 3.85 ft at 8:46PM Jul 31, 2021Observed: 3.84 ft at 9:00PM Jul 31, 2021Observed: 3.84 ft at 9:15PM Jul 31, 2021Observed: 3.83 ft at 9:30PM Jul 31, 2021Observed: 3.82 ft at 9:45PM Jul 31, 2021Observed: 3.81 ft at 10:00PM Jul 31, 2021Observed: 3.8 ft at 10:15PM Jul 31, 2021Observed: 3.8 ft at 10:30PM Jul 31, 2021Observed: 3.79 ft at 10:45PM Jul 31, 2021Observed: 3.78 ft at 11:00PM Jul 31, 2021Observed: 3.78 ft at 11:15PM Jul 31, 2021Observed: 3.78 ft at 11:30PM Jul 31, 2021Observed: 3.77 ft at 11:45PM Jul 31, 2021Observed: 3.76 ft at 12:00AM Aug 01, 2021Observed: 3.76 ft at 12:15AM Aug 01, 2021Observed: 3.75 ft at 12:30AM Aug 01, 2021Observed: 3.74 ft at 12:45AM Aug 01, 2021Observed: 3.74 ft at 1:00AM Aug 01, 2021Observed: 3.73 ft at 1:15AM Aug 01, 2021Observed: 3.72 ft at 1:30AM Aug 01, 2021Observed: 3.72 ft at 1:45AM Aug 01, 2021Observed: 3.71 ft at 2:00AM Aug 01, 2021Observed: 3.7 ft at 2:15AM Aug 01, 2021Observed: 3.69 ft at 2:30AM Aug 01, 2021Observed: 3.69 ft at 2:45AM Aug 01, 2021Observed: 3.69 ft at 2:46AM Aug 01, 2021Observed: 3.68 ft at 3:00AM Aug 01, 2021Observed: 3.68 ft at 3:15AM Aug 01, 2021Observed: 3.67 ft at 3:30AM Aug 01, 2021Observed: 3.66 ft at 3:45AM Aug 01, 2021Observed: 3.66 ft at 4:00AM Aug 01, 2021Observed: 3.65 ft at 4:15AM Aug 01, 2021Observed: 3.64 ft at 4:30AM Aug 01, 2021Observed: 3.64 ft at 4:45AM Aug 01, 2021Observed: 3.63 ft at 5:00AM Aug 01, 2021Observed: 3.62 ft at 5:15AM Aug 01, 2021Observed: 3.62 ft at 5:30AM Aug 01, 2021Observed: 3.61 ft at 5:45AM Aug 01, 2021Observed: 3.61 ft at 6:00AM Aug 01, 2021Observed: 3.6 ft at 6:15AM Aug 01, 2021Observed: 3.6 ft at 6:30AM Aug 01, 2021Observed: 3.59 ft at 6:45AM Aug 01, 2021Observed: 3.58 ft at 7:00AM Aug 01, 2021Observed: 3.58 ft at 7:15AM Aug 01, 2021Observed: 3.57 ft at 7:30AM Aug 01, 2021Observed: 3.57 ft at 7:45AM Aug 01, 2021Observed: 3.56 ft at 8:00AM Aug 01, 2021Observed: 3.55 ft at 8:15AM Aug 01, 2021Observed: 3.55 ft at 8:30AM Aug 01, 2021Observed: 3.54 ft at 8:45AM Aug 01, 2021Observed: 3.54 ft at 8:46AM Aug 01, 2021Observed: 3.54 ft at 9:00AM Aug 01, 2021Observed: 3.53 ft at 9:15AM Aug 01, 2021Observed: 3.52 ft at 9:30AM Aug 01, 2021Observed: 3.52 ft at 9:45AM Aug 01, 2021Observed: 3.51 ft at 10:00AM Aug 01, 2021Observed: 3.5 ft at 10:15AM Aug 01, 2021Observed: 3.5 ft at 10:30AM Aug 01, 2021Observed: 3.49 ft at 10:45AM Aug 01, 2021Observed: 3.49 ft at 11:00AM Aug 01, 2021Observed: 3.48 ft at 11:15AM Aug 01, 2021Observed: 3.48 ft at 11:30AM Aug 01, 2021Observed: 3.47 ft at 11:45AM Aug 01, 2021Observed: 3.46 ft at 12:00PM Aug 01, 2021Observed: 3.46 ft at 12:15PM Aug 01, 2021Observed: 3.45 ft at 12:30PM Aug 01, 2021Observed: 3.45 ft at 12:45PM Aug 01, 2021Observed: 3.44 ft at 1:00PM Aug 01, 2021Observed: 3.44 ft at 1:15PM Aug 01, 2021Observed: 3.43 ft at 1:30PM Aug 01, 2021Observed: 3.42 ft at 1:45PM Aug 01, 2021Observed: 3.42 ft at 2:00PM Aug 01, 2021Observed: 3.41 ft at 2:15PM Aug 01, 2021Observed: 3.41 ft at 2:30PM Aug 01, 2021Observed: 3.4 ft at 2:45PM Aug 01, 2021Observed: 3.4 ft at 2:46PM Aug 01, 2021Observed: 3.4 ft at 3:00PM Aug 01, 2021Observed: 3.4 ft at 3:15PM Aug 01, 2021Observed: 3.39 ft at 3:30PM Aug 01, 2021Observed: 3.38 ft at 3:45PM Aug 01, 2021Observed: 3.38 ft at 4:00PM Aug 01, 2021Observed: 3.37 ft at 4:15PM Aug 01, 2021Observed: 3.37 ft at 4:30PM Aug 01, 2021Observed: 3.37 ft at 4:45PM Aug 01, 2021Observed: 3.36 ft at 5:00PM Aug 01, 2021Observed: 3.36 ft at 5:15PM Aug 01, 2021Observed: 3.35 ft at 5:30PM Aug 01, 2021Observed: 3.34 ft at 5:45PM Aug 01, 2021Observed: 3.34 ft at 6:00PM Aug 01, 2021Observed: 3.33 ft at 6:15PM Aug 01, 2021Observed: 3.33 ft at 6:30PM Aug 01, 2021Observed: 3.32 ft at 6:45PM Aug 01, 2021Observed: 3.32 ft at 7:00PM Aug 01, 2021Observed: 3.31 ft at 7:15PM Aug 01, 2021Observed: 3.31 ft at 7:30PM Aug 01, 2021Observed: 3.3 ft at 7:45PM Aug 01, 2021Observed: 3.3 ft at 8:00PM Aug 01, 2021Observed: 3.3 ft at 8:15PM Aug 01, 2021Observed: 3.3 ft at 8:30PM Aug 01, 2021Observed: 3.31 ft at 8:45PM Aug 01, 2021Observed: 3.32 ft at 9:00PM Aug 01, 2021Observed: 3.32 ft at 9:01PM Aug 01, 2021Observed: 3.33 ft at 9:15PM Aug 01, 2021Observed: 3.36 ft at 9:30PM Aug 01, 2021Observed: 3.38 ft at 9:45PM Aug 01, 2021Observed: 3.4 ft at 10:00PM Aug 01, 2021Observed: 3.42 ft at 10:15PM Aug 01, 2021Observed: 3.46 ft at 10:30PM Aug 01, 2021Observed: 3.51 ft at 10:45PM Aug 01, 2021Observed: 3.57 ft at 11:00PM Aug 01, 2021Observed: 3.64 ft at 11:15PM Aug 01, 2021Observed: 3.72 ft at 11:30PM Aug 01, 2021Observed: 3.8 ft at 11:45PM Aug 01, 2021Observed: 3.9 ft at 12:00AM Aug 02, 2021Observed: 3.98 ft at 12:15AM Aug 02, 2021Observed: 4.08 ft at 12:30AM Aug 02, 2021Observed: 4.18 ft at 12:45AM Aug 02, 2021Observed: 4.28 ft at 1:00AM Aug 02, 2021Observed: 4.37 ft at 1:15AM Aug 02, 2021Observed: 4.46 ft at 1:30AM Aug 02, 2021Observed: 4.55 ft at 1:45AM Aug 02, 2021Observed: 4.63 ft at 2:00AM Aug 02, 2021Observed: 4.69 ft at 2:15AM Aug 02, 2021Observed: 4.75 ft at 2:30AM Aug 02, 2021Observed: 4.81 ft at 2:45AM Aug 02, 2021Observed: 4.85 ft at 3:00AM Aug 02, 2021Observed: 4.85 ft at 3:01AM Aug 02, 2021Observed: 4.88 ft at 3:15AM Aug 02, 2021Observed: 4.91 ft at 3:30AM Aug 02, 2021Observed: 4.94 ft at 3:45AM Aug 02, 2021Observed: 4.98 ft at 4:00AM Aug 02, 2021Observed: 5.03 ft at 4:15AM Aug 02, 2021Highest Observation: 5.08 ft at 4:30AM Aug 02, 2021Forecast: 3.7 ft 8:00AM Aug 02, 2021Highest Forecast: 4 ft 2:00PM Aug 02, 2021Highest Forecast: 4 ft 8:00PM Aug 02, 2021Forecast: 3.9 ft 2:00AM Aug 03, 2021Forecast: 3.7 ft 8:00AM Aug 03, 2021Forecast: 3.6 ft 2:00PM Aug 03, 2021Forecast: 3.5 ft 8:00PM Aug 03, 2021Forecast: 3.4 ft 2:00AM Aug 04, 2021Forecast: 3.3 ft 8:00AM Aug 04, 2021Forecast: 3.2 ft 2:00PM Aug 04, 2021Forecast: 3.1 ft 8:00PM Aug 04, 2021USGS--Water Resources of the United StatesBRSN3(plotting HGIRG) Graph Created (5:36AM Aug 2, 2021)ObservedForecast (issued 10:02PM Aug 1)Latest observed value: 5.08 ft at 4:30 AM EDT 2-Aug-2021. Flood Stage is 8 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Smith River (NH) at Bristol are issued routinely year-round.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 14
Moderate Flood Stage: 12
Flood Stage: 8
Action Stage: 6
Low Stage (in feet): 0

Historic Crests
(1) 16.09 ft on 03/19/1936
(2) 11.41 ft on 05/14/2006
(3) 10.77 ft on 09/22/1938
(4) 10.44 ft on 03/27/1953
(5) 10.37 ft on 04/12/1934
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.18 ft on 08/29/2011
(2) 8.65 ft on 04/17/2007
(3) 11.41 ft on 05/14/2006
(4) 8.22 ft on 04/04/2005
(5) 8.99 ft on 10/21/1996
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
16 Smith River Road floods in several locations from Bristol to Danbury.
14 Flooding begins on Smith River Road.
12 Prime farmland flooded from Bristol to Danbury.
8 Minor lowland flooding begins.
About This Location Collapse

Latitude: 43.566463° N, Longitude: 71.747900° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 8 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 29 449.8 ft 457.8 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

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 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
Gray Weather Forecast Office
P.O. Box 1208, 1 Weather Lane, Route 231
Gray, ME 04039
(207) 688-3216
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Page last modified: 2-Nov-2020 7:30 PM
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