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Hydrograph River at a Glance Download
Penobscot River above Grindstone Stage (ft)Flow (kcfs)Observed: 8.09 ft at 4:15AM Apr 15, 2014Observed: 8.11 ft at 4:30AM Apr 15, 2014Observed: 8.13 ft at 4:45AM Apr 15, 2014Observed: 8.16 ft at 5:00AM Apr 15, 2014Observed: 8.19 ft at 5:15AM Apr 15, 2014Observed: 8.21 ft at 5:30AM Apr 15, 2014Observed: 8.23 ft at 5:45AM Apr 15, 2014Observed: 8.26 ft at 6:00AM Apr 15, 2014Observed: 8.27 ft at 6:15AM Apr 15, 2014Observed: 8.29 ft at 6:30AM Apr 15, 2014Observed: 8.32 ft at 6:45AM Apr 15, 2014Observed: 8.34 ft at 7:00AM Apr 15, 2014Observed: 8.36 ft at 7:15AM Apr 15, 2014Observed: 8.38 ft at 7:30AM Apr 15, 2014Observed: 8.4 ft at 7:45AM Apr 15, 2014Observed: 8.43 ft at 8:00AM Apr 15, 2014Observed: 8.45 ft at 8:15AM Apr 15, 2014Observed: 8.47 ft at 8:30AM Apr 15, 2014Observed: 8.49 ft at 8:45AM Apr 15, 2014Observed: 8.5 ft at 9:00AM Apr 15, 2014Observed: 8.53 ft at 9:15AM Apr 15, 2014Observed: 8.55 ft at 9:30AM Apr 15, 2014Observed: 8.55 ft at 9:45AM Apr 15, 2014Observed: 8.57 ft at 10:00AM Apr 15, 2014Observed: 8.58 ft at 10:15AM Apr 15, 2014Observed: 8.6 ft at 10:30AM Apr 15, 2014Observed: 8.62 ft at 10:45AM Apr 15, 2014Observed: 8.65 ft at 11:00AM Apr 15, 2014Observed: 8.66 ft at 11:15AM Apr 15, 2014Observed: 8.68 ft at 11:30AM Apr 15, 2014Observed: 8.68 ft at 11:45AM Apr 15, 2014Observed: 8.68 ft at 12:00PM Apr 15, 2014Observed: 8.7 ft at 12:15PM Apr 15, 2014Observed: 8.72 ft at 12:30PM Apr 15, 2014Observed: 8.74 ft at 12:45PM Apr 15, 2014Observed: 8.73 ft at 1:00PM Apr 15, 2014Observed: 8.73 ft at 1:15PM Apr 15, 2014Observed: 8.74 ft at 1:30PM Apr 15, 2014Observed: 8.76 ft at 1:45PM Apr 15, 2014Observed: 8.77 ft at 2:00PM Apr 15, 2014Observed: 8.8 ft at 2:15PM Apr 15, 2014Observed: 8.8 ft at 2:30PM Apr 15, 2014Observed: 8.81 ft at 2:45PM Apr 15, 2014Observed: 8.81 ft at 3:00PM Apr 15, 2014Observed: 8.81 ft at 3:15PM Apr 15, 2014Observed: 8.83 ft at 3:30PM Apr 15, 2014Observed: 8.84 ft at 3:45PM Apr 15, 2014Observed: 8.77 ft at 4:00PM Apr 15, 2014Observed: 8.88 ft at 4:15PM Apr 15, 2014Observed: 8.89 ft at 4:30PM Apr 15, 2014Observed: 8.9 ft at 4:45PM Apr 15, 2014Observed: 8.9 ft at 5:00PM Apr 15, 2014Observed: 8.91 ft at 5:15PM Apr 15, 2014Observed: 8.94 ft at 5:30PM Apr 15, 2014Observed: 8.95 ft at 5:45PM Apr 15, 2014Observed: 8.97 ft at 6:00PM Apr 15, 2014Observed: 8.99 ft at 6:15PM Apr 15, 2014Observed: 9 ft at 6:30PM Apr 15, 2014Observed: 9.02 ft at 6:45PM Apr 15, 2014Observed: 9.03 ft at 7:00PM Apr 15, 2014Observed: 9.03 ft at 7:15PM Apr 15, 2014Observed: 9.06 ft at 7:30PM Apr 15, 2014Observed: 9.08 ft at 7:45PM Apr 15, 2014Observed: 9.1 ft at 8:00PM Apr 15, 2014Observed: 9.13 ft at 8:15PM Apr 15, 2014Observed: 9.17 ft at 8:30PM Apr 15, 2014Observed: 9.2 ft at 8:45PM Apr 15, 2014Observed: 9.23 ft at 9:00PM Apr 15, 2014Observed: 9.26 ft at 9:15PM Apr 15, 2014Observed: 9.29 ft at 9:30PM Apr 15, 2014Observed: 9.34 ft at 9:45PM Apr 15, 2014Observed: 9.37 ft at 10:00PM Apr 15, 2014Observed: 9.41 ft at 10:15PM Apr 15, 2014Observed: 9.46 ft at 10:30PM Apr 15, 2014Observed: 9.48 ft at 10:45PM Apr 15, 2014Observed: 9.55 ft at 11:00PM Apr 15, 2014Observed: 9.5 ft at 11:15PM Apr 15, 2014Observed: 9.45 ft at 11:30PM Apr 15, 2014Observed: 9.44 ft at 11:45PM Apr 15, 2014Observed: 9.45 ft at 12:00AM Apr 16, 2014Observed: 9.48 ft at 12:15AM Apr 16, 2014Observed: 9.51 ft at 12:30AM Apr 16, 2014Observed: 9.55 ft at 12:45AM Apr 16, 2014Observed: 9.6 ft at 1:00AM Apr 16, 2014Observed: 9.65 ft at 1:15AM Apr 16, 2014Observed: 9.7 ft at 1:30AM Apr 16, 2014Observed: 9.75 ft at 1:45AM Apr 16, 2014Observed: 9.79 ft at 2:00AM Apr 16, 2014Observed: 9.82 ft at 2:15AM Apr 16, 2014Observed: 9.85 ft at 2:30AM Apr 16, 2014Observed: 9.89 ft at 2:45AM Apr 16, 2014Observed: 9.82 ft at 3:00AM Apr 16, 2014Observed: 9.72 ft at 3:15AM Apr 16, 2014Observed: 9.95 ft at 3:30AM Apr 16, 2014Observed: 10.01 ft at 3:45AM Apr 16, 2014Observed: 9.77 ft at 4:00AM Apr 16, 2014Observed: 9.88 ft at 4:15AM Apr 16, 2014Observed: 9.97 ft at 4:30AM Apr 16, 2014Observed: 10.02 ft at 4:45AM Apr 16, 2014Observed: 10.08 ft at 5:00AM Apr 16, 2014Observed: 10.11 ft at 5:15AM Apr 16, 2014Observed: 10.15 ft at 5:30AM Apr 16, 2014Observed: 10.2 ft at 5:45AM Apr 16, 2014Observed: 10.26 ft at 6:00AM Apr 16, 2014Observed: 10.3 ft at 6:15AM Apr 16, 2014Observed: 10.35 ft at 6:30AM Apr 16, 2014Observed: 10.39 ft at 6:45AM Apr 16, 2014Observed: 10.44 ft at 7:00AM Apr 16, 2014Observed: 10.49 ft at 7:15AM Apr 16, 2014Observed: 10.55 ft at 7:30AM Apr 16, 2014Observed: 10.59 ft at 7:45AM Apr 16, 2014Observed: 10.61 ft at 8:00AM Apr 16, 2014Observed: 10.65 ft at 8:15AM Apr 16, 2014Observed: 10.69 ft at 8:30AM Apr 16, 2014Observed: 10.72 ft at 8:45AM Apr 16, 2014Observed: 10.76 ft at 9:00AM Apr 16, 2014Observed: 10.77 ft at 9:15AM Apr 16, 2014Observed: 10.8 ft at 9:30AM Apr 16, 2014Observed: 10.83 ft at 9:45AM Apr 16, 2014Observed: 10.84 ft at 10:00AM Apr 16, 2014Observed: 10.89 ft at 10:15AM Apr 16, 2014Observed: 10.96 ft at 10:30AM Apr 16, 2014Observed: 11.05 ft at 10:45AM Apr 16, 2014Observed: 11.05 ft at 11:00AM Apr 16, 2014Observed: 11.08 ft at 11:15AM Apr 16, 2014Observed: 11.13 ft at 11:30AM Apr 16, 2014Observed: 11.2 ft at 11:45AM Apr 16, 2014Observed: 11.26 ft at 12:00PM Apr 16, 2014Observed: 11.31 ft at 12:15PM Apr 16, 2014Observed: 11.33 ft at 12:30PM Apr 16, 2014Observed: 11.39 ft at 12:45PM Apr 16, 2014Observed: 11.42 ft at 1:00PM Apr 16, 2014Observed: 11.45 ft at 1:15PM Apr 16, 2014Observed: 11.5 ft at 1:30PM Apr 16, 2014Observed: 11.52 ft at 1:45PM Apr 16, 2014Observed: 11.55 ft at 2:00PM Apr 16, 2014Observed: 11.59 ft at 2:15PM Apr 16, 2014Observed: 11.61 ft at 2:30PM Apr 16, 2014Observed: 11.66 ft at 2:45PM Apr 16, 2014Observed: 11.68 ft at 3:00PM Apr 16, 2014Observed: 11.71 ft at 3:15PM Apr 16, 2014Observed: 11.73 ft at 3:30PM Apr 16, 2014Observed: 11.75 ft at 3:45PM Apr 16, 2014Observed: 11.78 ft at 4:00PM Apr 16, 2014Observed: 11.8 ft at 4:15PM Apr 16, 2014Observed: 11.83 ft at 4:30PM Apr 16, 2014Observed: 11.85 ft at 4:45PM Apr 16, 2014Observed: 11.86 ft at 5:00PM Apr 16, 2014Observed: 11.88 ft at 5:15PM Apr 16, 2014Observed: 11.9 ft at 5:30PM Apr 16, 2014Observed: 11.91 ft at 5:45PM Apr 16, 2014Observed: 11.94 ft at 6:00PM Apr 16, 2014Observed: 11.83 ft at 6:15PM Apr 16, 2014Observed: 11.83 ft at 6:30PM Apr 16, 2014Observed: 11.85 ft at 6:45PM Apr 16, 2014Observed: 11.86 ft at 7:00PM Apr 16, 2014Observed: 11.88 ft at 7:15PM Apr 16, 2014Observed: 11.9 ft at 7:30PM Apr 16, 2014Observed: 11.91 ft at 7:45PM Apr 16, 2014Observed: 11.92 ft at 8:00PM Apr 16, 2014Observed: 11.93 ft at 8:15PM Apr 16, 2014Observed: 11.93 ft at 8:30PM Apr 16, 2014Observed: 11.95 ft at 8:45PM Apr 16, 2014Highest Observation: 11.96 ft at 9:00PM Apr 16, 2014Observed: 11.95 ft at 9:15PM Apr 16, 2014Observed: 11.95 ft at 9:30PM Apr 16, 2014Observed: 11.94 ft at 9:45PM Apr 16, 2014Observed: 11.93 ft at 10:00PM Apr 16, 2014Observed: 11.94 ft at 10:15PM Apr 16, 2014Observed: 11.95 ft at 10:30PM Apr 16, 2014Observed: 11.94 ft at 10:45PM Apr 16, 2014Observed: 11.95 ft at 11:00PM Apr 16, 2014Observed: 11.95 ft at 11:15PM Apr 16, 2014Observed: 11.93 ft at 11:30PM Apr 16, 2014Observed: 11.93 ft at 11:45PM Apr 16, 2014Observed: 11.92 ft at 12:00AM Apr 17, 2014Observed: 11.93 ft at 12:15AM Apr 17, 2014Observed: 11.92 ft at 12:30AM Apr 17, 2014Observed: 11.92 ft at 12:45AM Apr 17, 2014Observed: 11.9 ft at 1:00AM Apr 17, 2014Observed: 11.9 ft at 1:15AM Apr 17, 2014Observed: 11.89 ft at 1:30AM Apr 17, 2014Observed: 11.9 ft at 1:45AM Apr 17, 2014Observed: 11.88 ft at 2:00AM Apr 17, 2014Observed: 11.88 ft at 2:15AM Apr 17, 2014Observed: 11.86 ft at 2:30AM Apr 17, 2014Observed: 11.85 ft at 2:45AM Apr 17, 2014Observed: 11.85 ft at 3:00AM Apr 17, 2014Observed: 11.83 ft at 3:15AM Apr 17, 2014Observed: 11.83 ft at 3:30AM Apr 17, 2014Observed: 11.82 ft at 3:45AM Apr 17, 2014Observed: 11.82 ft at 4:00AM Apr 17, 2014Observed: 11.8 ft at 4:15AM Apr 17, 2014Observed: 11.8 ft at 4:30AM Apr 17, 2014Observed: 11.79 ft at 4:45AM Apr 17, 2014Observed: 11.77 ft at 5:00AM Apr 17, 2014Observed: 11.76 ft at 5:15AM Apr 17, 2014Observed: 11.75 ft at 5:30AM Apr 17, 2014Observed: 11.73 ft at 5:45AM Apr 17, 2014Observed: 11.74 ft at 6:00AM Apr 17, 2014Observed: 11.71 ft at 6:15AM Apr 17, 2014Observed: 11.7 ft at 6:30AM Apr 17, 2014Observed: 11.69 ft at 6:45AM Apr 17, 2014Observed: 11.67 ft at 7:00AM Apr 17, 2014Observed: 11.65 ft at 7:15AM Apr 17, 2014Observed: 11.64 ft at 7:30AM Apr 17, 2014Observed: 11.62 ft at 7:45AM Apr 17, 2014Observed: 11.6 ft at 8:00AM Apr 17, 2014Observed: 11.61 ft at 8:15AM Apr 17, 2014Observed: 11.57 ft at 8:30AM Apr 17, 2014Observed: 11.56 ft at 8:45AM Apr 17, 2014Observed: 11.54 ft at 9:00AM Apr 17, 2014Observed: 11.54 ft at 9:15AM Apr 17, 2014Observed: 11.52 ft at 9:30AM Apr 17, 2014Observed: 11.52 ft at 9:45AM Apr 17, 2014Observed: 11.51 ft at 10:00AM Apr 17, 2014Observed: 11.51 ft at 10:15AM Apr 17, 2014Observed: 11.51 ft at 10:30AM Apr 17, 2014Observed: 11.53 ft at 10:45AM Apr 17, 2014Observed: 11.52 ft at 11:00AM Apr 17, 2014Observed: 11.52 ft at 11:15AM Apr 17, 2014Observed: 11.52 ft at 11:30AM Apr 17, 2014Observed: 11.53 ft at 11:45AM Apr 17, 2014Observed: 11.51 ft at 12:00PM Apr 17, 2014Observed: 11.51 ft at 12:15PM Apr 17, 2014Observed: 11.5 ft at 12:30PM Apr 17, 2014Observed: 11.48 ft at 12:45PM Apr 17, 2014Observed: 11.48 ft at 1:00PM Apr 17, 2014Observed: 11.47 ft at 1:15PM Apr 17, 2014Observed: 11.45 ft at 1:30PM Apr 17, 2014Observed: 11.45 ft at 1:45PM Apr 17, 2014Observed: 11.45 ft at 2:00PM Apr 17, 2014Observed: 11.44 ft at 2:15PM Apr 17, 2014Observed: 11.43 ft at 2:30PM Apr 17, 2014Observed: 11.43 ft at 2:45PM Apr 17, 2014Observed: 11.41 ft at 3:00PM Apr 17, 2014Observed: 11.41 ft at 3:15PM Apr 17, 2014Observed: 11.41 ft at 3:30PM Apr 17, 2014Observed: 11.39 ft at 3:45PM Apr 17, 2014Observed: 11.39 ft at 4:00PM Apr 17, 2014Observed: 11.39 ft at 4:15PM Apr 17, 2014Observed: 11.36 ft at 4:30PM Apr 17, 2014Observed: 11.36 ft at 4:45PM Apr 17, 2014Observed: 11.36 ft at 5:00PM Apr 17, 2014Observed: 11.36 ft at 5:15PM Apr 17, 2014Observed: 11.34 ft at 5:30PM Apr 17, 2014Observed: 11.33 ft at 5:45PM Apr 17, 2014Observed: 11.33 ft at 6:00PM Apr 17, 2014Observed: 11.31 ft at 6:15PM Apr 17, 2014Observed: 11.31 ft at 6:30PM Apr 17, 2014Observed: 11.3 ft at 6:45PM Apr 17, 2014Observed: 11.29 ft at 7:00PM Apr 17, 2014Observed: 11.27 ft at 7:15PM Apr 17, 2014Observed: 11.26 ft at 7:30PM Apr 17, 2014Observed: 11.28 ft at 7:45PM Apr 17, 2014Observed: 11.26 ft at 8:00PM Apr 17, 2014Observed: 11.25 ft at 8:15PM Apr 17, 2014Observed: 11.23 ft at 8:30PM Apr 17, 2014Observed: 11.22 ft at 8:45PM Apr 17, 2014Observed: 11.22 ft at 9:00PM Apr 17, 2014Observed: 11.22 ft at 9:15PM Apr 17, 2014Observed: 11.2 ft at 9:30PM Apr 17, 2014Observed: 11.2 ft at 9:45PM Apr 17, 2014Observed: 11.18 ft at 10:00PM Apr 17, 2014Observed: 11.18 ft at 10:15PM Apr 17, 2014Observed: 11.17 ft at 10:30PM Apr 17, 2014Observed: 11.16 ft at 10:45PM Apr 17, 2014Observed: 11.15 ft at 11:00PM Apr 17, 2014Observed: 11.13 ft at 11:15PM Apr 17, 2014Observed: 11.12 ft at 11:30PM Apr 17, 2014Observed: 11.11 ft at 11:45PM Apr 17, 2014Observed: 11.1 ft at 12:00AM Apr 18, 2014Observed: 11.1 ft at 12:15AM Apr 18, 2014Observed: 11.09 ft at 12:30AM Apr 18, 2014Observed: 11.08 ft at 12:45AM Apr 18, 2014Observed: 11.07 ft at 1:00AM Apr 18, 2014Observed: 11.06 ft at 1:15AM Apr 18, 2014Observed: 11.05 ft at 1:30AM Apr 18, 2014Observed: 11.04 ft at 1:45AM Apr 18, 2014Observed: 11.04 ft at 2:00AM Apr 18, 2014Observed: 11.02 ft at 2:15AM Apr 18, 2014Observed: 11.01 ft at 2:30AM Apr 18, 2014Observed: 11 ft at 2:45AM Apr 18, 2014Observed: 10.97 ft at 3:00AM Apr 18, 2014Observed: 10.98 ft at 3:15AM Apr 18, 2014Observed: 10.95 ft at 3:30AM Apr 18, 2014Observed: 10.94 ft at 3:45AM Apr 18, 2014Highest Forecast: 10.6 ft 8:00AM Apr 18, 2014Forecast: 10.3 ft 2:00PM Apr 18, 2014Forecast: 10 ft 8:00PM Apr 18, 2014Forecast: 9.8 ft 2:00AM Apr 19, 2014Forecast: 9.5 ft 8:00AM Apr 19, 2014Forecast: 9.4 ft 2:00PM Apr 19, 2014Forecast: 9.3 ft 8:00PM Apr 19, 2014Forecast: 9.2 ft 2:00AM Apr 20, 2014Forecast: 9 ft 8:00AM Apr 20, 2014Forecast: 9 ft 2:00PM Apr 20, 2014Forecast: 8.9 ft 8:00PM Apr 20, 2014USGS--Water Resources of the United StatesGRNM1(plotting HGIRG) Graph Created (4:00AM Apr 18, 2014)ObservedForecast (issued 9:25PM Apr 17)Latest observed value: 10.94 ft at 3:45 AM EDT 18-Apr-2014. Flood Stage is 13 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Gauge reading may be affected by ice.

NOTE: Forecasts for the Penobscot River above Grindstone are issued routinely year-round.

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Downstream Gauge Downstream Gauge - at West Enfield
Flood Categories (in feet)
Major Flood Stage:16
Moderate Flood Stage:15
Flood Stage:13
Action Stage:10

Historical Crests
(1) 16.90 ft on 04/30/1923
(2) 15.02 ft on 04/30/2008
(3) 14.71 ft on 04/29/1973
(4) 14.30 ft on 09/29/1909
(5) 14.00 ft on 03/20/1936


Low Water Records
Currently none available.
Zoom Level: 16
Gauge Location
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 WIDESPREAD FLOODING OF STATE ROUTE 11 FROM GRINDSTONE TO MEDWAY. NUMEROUS HOMES, CAMPS AND CAMPGROUNDS INUNDATED. FLOODING AKIN TO APRIL 1923.
15 STATE ROUTE 11 FLOODED AND IMPASSABLE. HOMES/CAMPS INUNDATED.
13 STATE ROUTE 11 FLOODED IN PLACES. HOMES/CAMPS THREATENED.
12 ROUTE 11 IMPACTED, BUT PASSABLE.
10 MINOR LOWLAND FLOODING OCCURS.
About This Location Collapse

Latitude: 45.730278° N, Longitude: 68.589444° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 13 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 29 294.74 ft 307.74 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:

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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
Caribou Weather Forecast Office
810 Main St.
Caribou, ME 04736
(207) 492-0170
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Page last modified: 8-Apr-2014 8:38 AM
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