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Hydrograph River at a Glance Download
Grande Ronde River at Troy Stage (ft)Flow (cfs)Observed: 3.99 ft at 4:00PM Feb 20, 2019Highest Observation: 4 ft at 4:15PM Feb 20, 2019Highest Observation: 4 ft at 4:30PM Feb 20, 2019Highest Observation: 4 ft at 4:45PM Feb 20, 2019Highest Observation: 4 ft at 5:00PM Feb 20, 2019Highest Observation: 4 ft at 5:15PM Feb 20, 2019Highest Observation: 4 ft at 5:30PM Feb 20, 2019Highest Observation: 4 ft at 5:45PM Feb 20, 2019Observed: 3.99 ft at 6:00PM Feb 20, 2019Observed: 3.99 ft at 6:15PM Feb 20, 2019Observed: 3.99 ft at 6:30PM Feb 20, 2019Observed: 3.99 ft at 6:45PM Feb 20, 2019Observed: 3.99 ft at 7:00PM Feb 20, 2019Observed: 3.99 ft at 7:15PM Feb 20, 2019Observed: 3.99 ft at 7:30PM Feb 20, 2019Observed: 3.99 ft at 7:45PM Feb 20, 2019Observed: 3.99 ft at 8:00PM Feb 20, 2019Observed: 3.99 ft at 8:15PM Feb 20, 2019Observed: 3.98 ft at 8:30PM Feb 20, 2019Observed: 3.98 ft at 8:45PM Feb 20, 2019Observed: 3.98 ft at 9:00PM Feb 20, 2019Observed: 3.98 ft at 9:15PM Feb 20, 2019Observed: 3.98 ft at 9:30PM Feb 20, 2019Observed: 3.98 ft at 9:45PM Feb 20, 2019Observed: 3.98 ft at 10:00PM Feb 20, 2019Observed: 3.97 ft at 10:15PM Feb 20, 2019Observed: 3.98 ft at 10:30PM Feb 20, 2019Observed: 3.98 ft at 10:45PM Feb 20, 2019Observed: 3.98 ft at 11:00PM Feb 20, 2019Observed: 3.98 ft at 11:15PM Feb 20, 2019Observed: 3.98 ft at 11:30PM Feb 20, 2019Observed: 3.97 ft at 11:45PM Feb 20, 2019Observed: 3.97 ft at 12:00AM Feb 21, 2019Observed: 3.98 ft at 12:15AM Feb 21, 2019Observed: 3.98 ft at 12:30AM Feb 21, 2019Observed: 3.98 ft at 12:45AM Feb 21, 2019Observed: 3.98 ft at 1:00AM Feb 21, 2019Observed: 3.97 ft at 1:15AM Feb 21, 2019Observed: 3.98 ft at 1:30AM Feb 21, 2019Observed: 3.98 ft at 1:45AM Feb 21, 2019Observed: 3.97 ft at 2:00AM Feb 21, 2019Observed: 3.97 ft at 2:15AM Feb 21, 2019Observed: 3.97 ft at 2:30AM Feb 21, 2019Observed: 3.97 ft at 2:45AM Feb 21, 2019Observed: 3.97 ft at 3:00AM Feb 21, 2019Observed: 3.97 ft at 3:15AM Feb 21, 2019Observed: 3.97 ft at 3:30AM Feb 21, 2019Observed: 3.97 ft at 3:45AM Feb 21, 2019Observed: 3.97 ft at 4:00AM Feb 21, 2019Observed: 3.97 ft at 4:15AM Feb 21, 2019Observed: 3.97 ft at 4:30AM Feb 21, 2019Observed: 3.97 ft at 4:45AM Feb 21, 2019Observed: 3.97 ft at 5:00AM Feb 21, 2019Observed: 3.97 ft at 5:15AM Feb 21, 2019Observed: 3.96 ft at 5:30AM Feb 21, 2019Observed: 3.96 ft at 5:45AM Feb 21, 2019Observed: 3.96 ft at 6:00AM Feb 21, 2019Observed: 3.96 ft at 6:15AM Feb 21, 2019Observed: 3.96 ft at 6:30AM Feb 21, 2019Observed: 3.96 ft at 6:45AM Feb 21, 2019Observed: 3.97 ft at 7:00AM Feb 21, 2019Observed: 3.97 ft at 7:15AM Feb 21, 2019Observed: 3.96 ft at 7:30AM Feb 21, 2019Observed: 3.96 ft at 7:45AM Feb 21, 2019Observed: 3.96 ft at 8:00AM Feb 21, 2019Observed: 3.96 ft at 8:15AM Feb 21, 2019Observed: 3.96 ft at 8:30AM Feb 21, 2019Observed: 3.96 ft at 8:45AM Feb 21, 2019Observed: 3.97 ft at 9:00AM Feb 21, 2019Observed: 3.96 ft at 9:15AM Feb 21, 2019Observed: 3.97 ft at 9:30AM Feb 21, 2019Observed: 3.97 ft at 9:45AM Feb 21, 2019Observed: 3.97 ft at 10:00AM Feb 21, 2019Observed: 3.96 ft at 10:15AM Feb 21, 2019Observed: 3.96 ft at 10:30AM Feb 21, 2019Observed: 3.97 ft at 10:45AM Feb 21, 2019Observed: 3.97 ft at 11:00AM Feb 21, 2019Observed: 3.97 ft at 11:15AM Feb 21, 2019Observed: 3.96 ft at 11:30AM Feb 21, 2019Observed: 3.97 ft at 11:45AM Feb 21, 2019Observed: 3.96 ft at 12:00PM Feb 21, 2019Observed: 3.96 ft at 12:15PM Feb 21, 2019Observed: 3.96 ft at 12:30PM Feb 21, 2019Observed: 3.96 ft at 12:45PM Feb 21, 2019Observed: 3.96 ft at 1:00PM Feb 21, 2019Observed: 3.96 ft at 1:15PM Feb 21, 2019Observed: 3.96 ft at 1:30PM Feb 21, 2019Observed: 3.96 ft at 1:45PM Feb 21, 2019Observed: 3.95 ft at 2:00PM Feb 21, 2019Observed: 3.96 ft at 2:15PM Feb 21, 2019Observed: 3.96 ft at 2:30PM Feb 21, 2019Observed: 3.96 ft at 2:45PM Feb 21, 2019Observed: 3.96 ft at 3:00PM Feb 21, 2019Observed: 3.96 ft at 3:15PM Feb 21, 2019Observed: 3.96 ft at 3:30PM Feb 21, 2019Observed: 3.95 ft at 3:45PM Feb 21, 2019Observed: 3.95 ft at 4:00PM Feb 21, 2019Observed: 3.95 ft at 4:15PM Feb 21, 2019Observed: 3.95 ft at 4:30PM Feb 21, 2019Observed: 3.95 ft at 4:45PM Feb 21, 2019Observed: 3.95 ft at 5:00PM Feb 21, 2019Observed: 3.95 ft at 5:15PM Feb 21, 2019Observed: 3.95 ft at 5:30PM Feb 21, 2019Observed: 3.94 ft at 5:45PM Feb 21, 2019Observed: 3.95 ft at 6:00PM Feb 21, 2019Observed: 3.94 ft at 6:15PM Feb 21, 2019Observed: 3.94 ft at 6:30PM Feb 21, 2019Observed: 3.94 ft at 6:45PM Feb 21, 2019Observed: 3.94 ft at 7:00PM Feb 21, 2019Observed: 3.94 ft at 7:15PM Feb 21, 2019Observed: 3.94 ft at 7:30PM Feb 21, 2019Observed: 3.94 ft at 7:45PM Feb 21, 2019Observed: 3.94 ft at 8:00PM Feb 21, 2019Observed: 3.94 ft at 8:15PM Feb 21, 2019Observed: 3.94 ft at 8:30PM Feb 21, 2019Observed: 3.94 ft at 8:45PM Feb 21, 2019Observed: 3.94 ft at 9:00PM Feb 21, 2019Observed: 3.93 ft at 9:15PM Feb 21, 2019Observed: 3.94 ft at 9:30PM Feb 21, 2019Observed: 3.93 ft at 9:45PM Feb 21, 2019Observed: 3.94 ft at 10:00PM Feb 21, 2019Observed: 3.93 ft at 10:15PM Feb 21, 2019Observed: 3.93 ft at 10:30PM Feb 21, 2019Observed: 3.93 ft at 10:45PM Feb 21, 2019Observed: 3.93 ft at 11:00PM Feb 21, 2019Observed: 3.93 ft at 11:15PM Feb 21, 2019Observed: 3.93 ft at 11:30PM Feb 21, 2019Observed: 3.93 ft at 11:45PM Feb 21, 2019Observed: 3.93 ft at 12:00AM Feb 22, 2019Observed: 3.93 ft at 12:15AM Feb 22, 2019Observed: 3.93 ft at 12:30AM Feb 22, 2019Observed: 3.93 ft at 12:45AM Feb 22, 2019Observed: 3.92 ft at 1:00AM Feb 22, 2019Observed: 3.93 ft at 1:15AM Feb 22, 2019Observed: 3.93 ft at 1:30AM Feb 22, 2019Observed: 3.92 ft at 1:45AM Feb 22, 2019Observed: 3.92 ft at 2:00AM Feb 22, 2019Observed: 3.92 ft at 2:15AM Feb 22, 2019Observed: 3.92 ft at 2:30AM Feb 22, 2019Observed: 3.92 ft at 2:45AM Feb 22, 2019Observed: 3.92 ft at 3:00AM Feb 22, 2019Observed: 3.92 ft at 3:15AM Feb 22, 2019Observed: 3.92 ft at 3:30AM Feb 22, 2019Observed: 3.92 ft at 3:45AM Feb 22, 2019Observed: 3.92 ft at 4:00AM Feb 22, 2019Observed: 3.92 ft at 4:15AM Feb 22, 2019Observed: 3.92 ft at 4:30AM Feb 22, 2019Observed: 3.92 ft at 4:45AM Feb 22, 2019Observed: 3.92 ft at 5:00AM Feb 22, 2019Observed: 3.92 ft at 5:15AM Feb 22, 2019Observed: 3.91 ft at 5:30AM Feb 22, 2019Observed: 3.91 ft at 5:45AM Feb 22, 2019Observed: 3.91 ft at 6:00AM Feb 22, 2019Observed: 3.91 ft at 6:15AM Feb 22, 2019Observed: 3.91 ft at 6:30AM Feb 22, 2019Observed: 3.9 ft at 6:45AM Feb 22, 2019Observed: 3.91 ft at 7:00AM Feb 22, 2019Observed: 3.9 ft at 7:15AM Feb 22, 2019Observed: 3.9 ft at 7:30AM Feb 22, 2019Observed: 3.9 ft at 7:45AM Feb 22, 2019Observed: 3.9 ft at 8:00AM Feb 22, 2019Observed: 3.9 ft at 8:15AM Feb 22, 2019Observed: 3.9 ft at 8:30AM Feb 22, 2019Observed: 3.9 ft at 8:45AM Feb 22, 2019Observed: 3.9 ft at 9:00AM Feb 22, 2019Observed: 3.9 ft at 9:15AM Feb 22, 2019Observed: 3.9 ft at 9:30AM Feb 22, 2019Observed: 3.9 ft at 9:45AM Feb 22, 2019Observed: 3.9 ft at 10:00AM Feb 22, 2019Observed: 3.9 ft at 10:15AM Feb 22, 2019Observed: 3.89 ft at 10:30AM Feb 22, 2019Observed: 3.89 ft at 10:45AM Feb 22, 2019Observed: 3.89 ft at 11:00AM Feb 22, 2019Observed: 3.89 ft at 11:15AM Feb 22, 2019Observed: 3.89 ft at 11:30AM Feb 22, 2019Observed: 3.88 ft at 11:45AM Feb 22, 2019Observed: 3.88 ft at 12:00PM Feb 22, 2019Observed: 3.88 ft at 12:15PM Feb 22, 2019Observed: 3.87 ft at 12:30PM Feb 22, 2019Observed: 3.87 ft at 12:45PM Feb 22, 2019Observed: 3.87 ft at 1:00PM Feb 22, 2019Observed: 3.87 ft at 1:15PM Feb 22, 2019Observed: 3.87 ft at 1:30PM Feb 22, 2019Observed: 3.87 ft at 1:45PM Feb 22, 2019Observed: 3.86 ft at 2:00PM Feb 22, 2019Observed: 3.86 ft at 2:15PM Feb 22, 2019Observed: 3.86 ft at 2:30PM Feb 22, 2019Observed: 3.86 ft at 2:45PM Feb 22, 2019Observed: 3.85 ft at 3:00PM Feb 22, 2019Observed: 3.85 ft at 3:15PM Feb 22, 2019Observed: 3.85 ft at 3:30PM Feb 22, 2019Observed: 3.85 ft at 3:45PM Feb 22, 2019Observed: 3.85 ft at 4:00PM Feb 22, 2019Observed: 3.85 ft at 4:15PM Feb 22, 2019Observed: 3.84 ft at 4:30PM Feb 22, 2019Observed: 3.84 ft at 4:45PM Feb 22, 2019Observed: 3.84 ft at 5:00PM Feb 22, 2019Observed: 3.84 ft at 5:15PM Feb 22, 2019Observed: 3.83 ft at 5:30PM Feb 22, 2019Observed: 3.83 ft at 5:45PM Feb 22, 2019Observed: 3.83 ft at 6:00PM Feb 22, 2019Observed: 3.83 ft at 6:15PM Feb 22, 2019Observed: 3.83 ft at 6:30PM Feb 22, 2019Observed: 3.83 ft at 6:45PM Feb 22, 2019Observed: 3.83 ft at 7:00PM Feb 22, 2019Observed: 3.82 ft at 7:15PM Feb 22, 2019Observed: 3.83 ft at 7:30PM Feb 22, 2019Observed: 3.83 ft at 7:45PM Feb 22, 2019Observed: 3.83 ft at 8:00PM Feb 22, 2019Observed: 3.83 ft at 8:15PM Feb 22, 2019Observed: 3.83 ft at 8:30PM Feb 22, 2019Observed: 3.82 ft at 8:45PM Feb 22, 2019Observed: 3.83 ft at 9:00PM Feb 22, 2019Observed: 3.83 ft at 9:15PM Feb 22, 2019Observed: 3.83 ft at 9:30PM Feb 22, 2019Observed: 3.84 ft at 9:45PM Feb 22, 2019Observed: 3.84 ft at 10:00PM Feb 22, 2019Observed: 3.84 ft at 10:15PM Feb 22, 2019Observed: 3.84 ft at 10:30PM Feb 22, 2019Observed: 3.85 ft at 10:45PM Feb 22, 2019Observed: 3.85 ft at 11:00PM Feb 22, 2019Observed: 3.85 ft at 11:15PM Feb 22, 2019Observed: 3.86 ft at 11:30PM Feb 22, 2019Observed: 3.87 ft at 11:45PM Feb 22, 2019Observed: 3.87 ft at 12:00AM Feb 23, 2019Observed: 3.88 ft at 12:15AM Feb 23, 2019Observed: 3.88 ft at 12:30AM Feb 23, 2019Observed: 3.87 ft at 12:45AM Feb 23, 2019Observed: 3.86 ft at 1:00AM Feb 23, 2019Observed: 3.86 ft at 1:15AM Feb 23, 2019Observed: 3.85 ft at 1:30AM Feb 23, 2019Observed: 3.85 ft at 1:45AM Feb 23, 2019Observed: 3.84 ft at 2:00AM Feb 23, 2019Observed: 3.84 ft at 2:15AM Feb 23, 2019Observed: 3.84 ft at 2:30AM Feb 23, 2019Observed: 3.85 ft at 2:45AM Feb 23, 2019Observed: 3.85 ft at 3:00AM Feb 23, 2019Observed: 3.85 ft at 3:15AM Feb 23, 2019Observed: 3.85 ft at 3:30AM Feb 23, 2019Observed: 3.85 ft at 3:45AM Feb 23, 2019Observed: 3.86 ft at 4:00AM Feb 23, 2019Observed: 3.87 ft at 4:15AM Feb 23, 2019Observed: 3.87 ft at 4:30AM Feb 23, 2019Observed: 3.87 ft at 4:45AM Feb 23, 2019Observed: 3.88 ft at 5:00AM Feb 23, 2019Observed: 3.88 ft at 5:15AM Feb 23, 2019Observed: 3.88 ft at 5:30AM Feb 23, 2019Observed: 3.88 ft at 5:45AM Feb 23, 2019Observed: 3.87 ft at 6:00AM Feb 23, 2019Highest Forecast: 3.8 ft 4:00PM Feb 23, 2019Forecast: 3.79 ft 10:00PM Feb 23, 2019Forecast: 3.78 ft 4:00AM Feb 24, 2019Forecast: 3.76 ft 10:00AM Feb 24, 2019Forecast: 3.75 ft 4:00PM Feb 24, 2019Forecast: 3.74 ft 10:00PM Feb 24, 2019Forecast: 3.73 ft 4:00AM Feb 25, 2019Forecast: 3.72 ft 10:00AM Feb 25, 2019Forecast: 3.7 ft 4:00PM Feb 25, 2019Forecast: 3.69 ft 10:00PM Feb 25, 2019Forecast: 3.69 ft 4:00AM Feb 26, 2019Forecast: 3.69 ft 10:00AM Feb 26, 2019Forecast: 3.68 ft 4:00PM Feb 26, 2019Forecast: 3.67 ft 10:00PM Feb 26, 2019Forecast: 3.66 ft 4:00AM Feb 27, 2019Forecast: 3.64 ft 10:00AM Feb 27, 2019Forecast: 3.63 ft 4:00PM Feb 27, 2019Forecast: 3.62 ft 10:00PM Feb 27, 2019Forecast: 3.62 ft 4:00AM Feb 28, 2019Forecast: 3.64 ft 10:00AM Feb 28, 2019Forecast: 3.67 ft 4:00PM Feb 28, 2019Forecast: 3.7 ft 10:00PM Feb 28, 2019Forecast: 3.73 ft 4:00AM Mar 01, 2019Forecast: 3.76 ft 10:00AM Mar 01, 2019Forecast: 3.77 ft 4:00PM Mar 01, 2019Forecast: 3.75 ft 10:00PM Mar 01, 2019Forecast: 3.72 ft 4:00AM Mar 02, 2019Forecast: 3.69 ft 10:00AM Mar 02, 2019USGS--Water Resources of the United StatesTRYO3(plotting HGIRG) Graph Created (3:47PM Feb 23, 2019)ObservedForecast (issued 3:13PM Feb 22)Latest observed value: 3.87 ft at 6:00 AM PST 23-Feb-2019. Flood Stage is 10 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Grande Ronde River at Troy are issued routinely year-round.
Return to Area Map
Upstream Gauge - near Perry Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 12
Moderate Flood Stage: 11
Flood Stage: 10
Action Stage: 8
Low Stage (in feet): 0

Historic Crests
(1) 13.76 ft on 02/09/1996
(2) 12.65 ft on 01/01/1997
(3) 11.85 ft on 03/10/2014
(4) 11.70 ft on 03/19/0017
(5) 11.25 ft on 12/23/1964
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 11.85 ft on 03/10/2014
(2) 10.30 ft on 01/17/2011
(3) 10.83 ft on 06/05/2010
(4) 10.44 ft on 04/14/2002
(5) 9.51 ft on 05/26/1998
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -0.99 ft on 11/25/1993
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
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16 Flooding along the left bank into the town of Troy.
11 Extensive flooding of fields around Troy are possible, but no residences are threatened.
10 Minor flooding of fields adjacent to the river from Elgin through Troy and downstream to the confluence of the Snake River.
9 Minor flooding in lowland fields from Elgin downstream through Troy and through southeast Washington to the Snake River.
About This Location Collapse

Latitude: 45.945702° N, Longitude: 117.451009° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 10 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 1585.98 ft 1595.98 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:
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
Pendleton Weather Forecast Office
2001 NW 56th Drive
Pendleton, OR 97801
(541) 276-7832
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