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Hydrograph River at a Glance Download
Portneuf River at Topaz Stage (ft)Flow (cfs)Observed: 2.5 ft at 6:00PM Oct 15, 2019Observed: 2.5 ft at 6:15PM Oct 15, 2019Observed: 2.5 ft at 6:30PM Oct 15, 2019Observed: 2.5 ft at 6:45PM Oct 15, 2019Observed: 2.51 ft at 7:00PM Oct 15, 2019Observed: 2.51 ft at 7:15PM Oct 15, 2019Observed: 2.51 ft at 7:30PM Oct 15, 2019Observed: 2.51 ft at 7:45PM Oct 15, 2019Observed: 2.51 ft at 8:00PM Oct 15, 2019Observed: 2.51 ft at 8:15PM Oct 15, 2019Observed: 2.51 ft at 8:30PM Oct 15, 2019Observed: 2.51 ft at 8:45PM Oct 15, 2019Observed: 2.51 ft at 9:00PM Oct 15, 2019Observed: 2.5 ft at 9:15PM Oct 15, 2019Observed: 2.51 ft at 9:30PM Oct 15, 2019Observed: 2.5 ft at 9:45PM Oct 15, 2019Observed: 2.5 ft at 10:00PM Oct 15, 2019Observed: 2.51 ft at 10:15PM Oct 15, 2019Observed: 2.5 ft at 10:30PM Oct 15, 2019Observed: 2.5 ft at 10:45PM Oct 15, 2019Observed: 2.5 ft at 11:00PM Oct 15, 2019Observed: 2.5 ft at 11:15PM Oct 15, 2019Observed: 2.51 ft at 11:30PM Oct 15, 2019Observed: 2.5 ft at 11:45PM Oct 15, 2019Observed: 2.5 ft at 12:00AM Oct 16, 2019Observed: 2.5 ft at 12:15AM Oct 16, 2019Observed: 2.5 ft at 12:30AM Oct 16, 2019Observed: 2.5 ft at 12:45AM Oct 16, 2019Observed: 2.5 ft at 1:00AM Oct 16, 2019Observed: 2.5 ft at 1:15AM Oct 16, 2019Observed: 2.5 ft at 1:30AM Oct 16, 2019Observed: 2.5 ft at 1:45AM Oct 16, 2019Observed: 2.5 ft at 2:00AM Oct 16, 2019Observed: 2.51 ft at 2:15AM Oct 16, 2019Observed: 2.51 ft at 2:30AM Oct 16, 2019Observed: 2.51 ft at 2:45AM Oct 16, 2019Observed: 2.51 ft at 3:00AM Oct 16, 2019Observed: 2.51 ft at 3:15AM Oct 16, 2019Observed: 2.51 ft at 3:30AM Oct 16, 2019Observed: 2.51 ft at 3:45AM Oct 16, 2019Observed: 2.5 ft at 4:00AM Oct 16, 2019Observed: 2.5 ft at 4:15AM Oct 16, 2019Observed: 2.5 ft at 4:30AM Oct 16, 2019Observed: 2.5 ft at 4:45AM Oct 16, 2019Observed: 2.5 ft at 5:00AM Oct 16, 2019Observed: 2.5 ft at 5:15AM Oct 16, 2019Observed: 2.5 ft at 5:30AM Oct 16, 2019Observed: 2.5 ft at 5:45AM Oct 16, 2019Observed: 2.5 ft at 6:00AM Oct 16, 2019Observed: 2.5 ft at 6:15AM Oct 16, 2019Observed: 2.51 ft at 6:30AM Oct 16, 2019Observed: 2.51 ft at 6:45AM Oct 16, 2019Observed: 2.51 ft at 7:00AM Oct 16, 2019Observed: 2.51 ft at 7:15AM Oct 16, 2019Observed: 2.51 ft at 7:30AM Oct 16, 2019Observed: 2.51 ft at 7:45AM Oct 16, 2019Observed: 2.51 ft at 8:00AM Oct 16, 2019Observed: 2.51 ft at 8:15AM Oct 16, 2019Observed: 2.51 ft at 8:30AM Oct 16, 2019Observed: 2.51 ft at 8:45AM Oct 16, 2019Observed: 2.51 ft at 9:00AM Oct 16, 2019Observed: 2.51 ft at 9:15AM Oct 16, 2019Observed: 2.51 ft at 9:30AM Oct 16, 2019Observed: 2.51 ft at 9:45AM Oct 16, 2019Observed: 2.51 ft at 10:00AM Oct 16, 2019Observed: 2.51 ft at 10:15AM Oct 16, 2019Observed: 2.51 ft at 10:30AM Oct 16, 2019Observed: 2.51 ft at 10:45AM Oct 16, 2019Observed: 2.5 ft at 11:00AM Oct 16, 2019Observed: 2.5 ft at 11:15AM Oct 16, 2019Observed: 2.5 ft at 11:30AM Oct 16, 2019Observed: 2.5 ft at 11:45AM Oct 16, 2019Observed: 2.51 ft at 12:00PM Oct 16, 2019Observed: 2.5 ft at 12:15PM Oct 16, 2019Observed: 2.51 ft at 12:30PM Oct 16, 2019Observed: 2.5 ft at 12:45PM Oct 16, 2019Observed: 2.51 ft at 1:00PM Oct 16, 2019Observed: 2.51 ft at 1:15PM Oct 16, 2019Observed: 2.51 ft at 1:30PM Oct 16, 2019Observed: 2.51 ft at 1:45PM Oct 16, 2019Observed: 2.51 ft at 2:00PM Oct 16, 2019Observed: 2.51 ft at 2:15PM Oct 16, 2019Observed: 2.51 ft at 2:30PM Oct 16, 2019Observed: 2.51 ft at 2:45PM Oct 16, 2019Observed: 2.51 ft at 3:00PM Oct 16, 2019Observed: 2.5 ft at 3:15PM Oct 16, 2019Observed: 2.5 ft at 3:30PM Oct 16, 2019Observed: 2.5 ft at 3:45PM Oct 16, 2019Observed: 2.5 ft at 4:00PM Oct 16, 2019Observed: 2.51 ft at 4:15PM Oct 16, 2019Observed: 2.5 ft at 4:30PM Oct 16, 2019Observed: 2.5 ft at 4:45PM Oct 16, 2019Observed: 2.5 ft at 5:00PM Oct 16, 2019Observed: 2.5 ft at 5:15PM Oct 16, 2019Observed: 2.5 ft at 5:30PM Oct 16, 2019Observed: 2.5 ft at 5:45PM Oct 16, 2019Observed: 2.5 ft at 6:00PM Oct 16, 2019Observed: 2.5 ft at 6:15PM Oct 16, 2019Observed: 2.51 ft at 6:30PM Oct 16, 2019Observed: 2.51 ft at 6:45PM Oct 16, 2019Observed: 2.51 ft at 7:00PM Oct 16, 2019Observed: 2.51 ft at 7:15PM Oct 16, 2019Observed: 2.51 ft at 7:30PM Oct 16, 2019Observed: 2.51 ft at 7:45PM Oct 16, 2019Observed: 2.51 ft at 8:00PM Oct 16, 2019Observed: 2.5 ft at 8:15PM Oct 16, 2019Observed: 2.5 ft at 8:30PM Oct 16, 2019Observed: 2.5 ft at 8:45PM Oct 16, 2019Observed: 2.5 ft at 9:00PM Oct 16, 2019Observed: 2.5 ft at 9:15PM Oct 16, 2019Observed: 2.5 ft at 9:30PM Oct 16, 2019Observed: 2.51 ft at 9:45PM Oct 16, 2019Observed: 2.5 ft at 10:00PM Oct 16, 2019Observed: 2.5 ft at 10:15PM Oct 16, 2019Observed: 2.51 ft at 10:30PM Oct 16, 2019Observed: 2.5 ft at 10:45PM Oct 16, 2019Observed: 2.5 ft at 11:00PM Oct 16, 2019Observed: 2.5 ft at 11:15PM Oct 16, 2019Observed: 2.5 ft at 11:30PM Oct 16, 2019Observed: 2.5 ft at 11:45PM Oct 16, 2019Observed: 2.5 ft at 12:00AM Oct 17, 2019Observed: 2.51 ft at 12:15AM Oct 17, 2019Observed: 2.51 ft at 12:30AM Oct 17, 2019Observed: 2.51 ft at 12:45AM Oct 17, 2019Observed: 2.51 ft at 1:00AM Oct 17, 2019Observed: 2.51 ft at 1:15AM Oct 17, 2019Observed: 2.51 ft at 1:30AM Oct 17, 2019Observed: 2.51 ft at 1:45AM Oct 17, 2019Observed: 2.51 ft at 2:00AM Oct 17, 2019Observed: 2.51 ft at 2:15AM Oct 17, 2019Observed: 2.51 ft at 2:30AM Oct 17, 2019Observed: 2.51 ft at 2:45AM Oct 17, 2019Observed: 2.51 ft at 3:00AM Oct 17, 2019Observed: 2.51 ft at 3:15AM Oct 17, 2019Observed: 2.51 ft at 3:30AM Oct 17, 2019Observed: 2.51 ft at 3:45AM Oct 17, 2019Observed: 2.51 ft at 4:00AM Oct 17, 2019Observed: 2.51 ft at 4:15AM Oct 17, 2019Observed: 2.51 ft at 4:30AM Oct 17, 2019Observed: 2.51 ft at 4:45AM Oct 17, 2019Observed: 2.51 ft at 5:00AM Oct 17, 2019Observed: 2.51 ft at 5:15AM Oct 17, 2019Observed: 2.51 ft at 5:30AM Oct 17, 2019Observed: 2.51 ft at 5:45AM Oct 17, 2019Observed: 2.51 ft at 6:00AM Oct 17, 2019Observed: 2.51 ft at 6:15AM Oct 17, 2019Observed: 2.51 ft at 6:30AM Oct 17, 2019Observed: 2.51 ft at 6:45AM Oct 17, 2019Observed: 2.51 ft at 7:00AM Oct 17, 2019Observed: 2.51 ft at 7:15AM Oct 17, 2019Observed: 2.51 ft at 7:30AM Oct 17, 2019Observed: 2.51 ft at 7:45AM Oct 17, 2019Observed: 2.5 ft at 8:00AM Oct 17, 2019Observed: 2.51 ft at 8:15AM Oct 17, 2019Observed: 2.51 ft at 8:30AM Oct 17, 2019Observed: 2.51 ft at 8:45AM Oct 17, 2019Observed: 2.51 ft at 9:00AM Oct 17, 2019Observed: 2.51 ft at 9:15AM Oct 17, 2019Observed: 2.51 ft at 9:30AM Oct 17, 2019Observed: 2.52 ft at 9:45AM Oct 17, 2019Observed: 2.52 ft at 10:00AM Oct 17, 2019Observed: 2.52 ft at 10:15AM Oct 17, 2019Observed: 2.51 ft at 10:30AM Oct 17, 2019Observed: 2.51 ft at 10:45AM Oct 17, 2019Observed: 2.51 ft at 11:00AM Oct 17, 2019Observed: 2.52 ft at 11:15AM Oct 17, 2019Observed: 2.52 ft at 11:30AM Oct 17, 2019Observed: 2.52 ft at 11:45AM Oct 17, 2019Observed: 2.52 ft at 12:00PM Oct 17, 2019Observed: 2.52 ft at 12:15PM Oct 17, 2019Observed: 2.52 ft at 12:30PM Oct 17, 2019Observed: 2.52 ft at 12:45PM Oct 17, 2019Observed: 2.52 ft at 1:00PM Oct 17, 2019Observed: 2.52 ft at 1:15PM Oct 17, 2019Observed: 2.52 ft at 1:30PM Oct 17, 2019Observed: 2.52 ft at 1:45PM Oct 17, 2019Observed: 2.51 ft at 2:00PM Oct 17, 2019Observed: 2.51 ft at 2:15PM Oct 17, 2019Observed: 2.51 ft at 2:30PM Oct 17, 2019Observed: 2.51 ft at 2:45PM Oct 17, 2019Observed: 2.51 ft at 3:00PM Oct 17, 2019Observed: 2.5 ft at 3:15PM Oct 17, 2019Observed: 2.51 ft at 3:30PM Oct 17, 2019Observed: 2.51 ft at 3:45PM Oct 17, 2019Observed: 2.51 ft at 4:00PM Oct 17, 2019Observed: 2.52 ft at 4:15PM Oct 17, 2019Observed: 2.51 ft at 4:30PM Oct 17, 2019Observed: 2.51 ft at 4:45PM Oct 17, 2019Observed: 2.51 ft at 5:00PM Oct 17, 2019Observed: 2.51 ft at 5:15PM Oct 17, 2019Observed: 2.52 ft at 5:30PM Oct 17, 2019Observed: 2.52 ft at 5:45PM Oct 17, 2019Observed: 2.52 ft at 6:00PM Oct 17, 2019Observed: 2.51 ft at 6:15PM Oct 17, 2019Observed: 2.52 ft at 6:30PM Oct 17, 2019Observed: 2.52 ft at 6:45PM Oct 17, 2019Observed: 2.52 ft at 7:00PM Oct 17, 2019Observed: 2.52 ft at 7:15PM Oct 17, 2019Observed: 2.52 ft at 7:30PM Oct 17, 2019Observed: 2.52 ft at 7:45PM Oct 17, 2019Observed: 2.52 ft at 8:00PM Oct 17, 2019Observed: 2.52 ft at 8:15PM Oct 17, 2019Observed: 2.52 ft at 8:30PM Oct 17, 2019Observed: 2.52 ft at 8:45PM Oct 17, 2019Observed: 2.52 ft at 9:00PM Oct 17, 2019Observed: 2.52 ft at 9:15PM Oct 17, 2019Observed: 2.52 ft at 9:30PM Oct 17, 2019Observed: 2.52 ft at 9:45PM Oct 17, 2019Observed: 2.52 ft at 10:00PM Oct 17, 2019Observed: 2.52 ft at 10:15PM Oct 17, 2019Observed: 2.52 ft at 10:30PM Oct 17, 2019Observed: 2.52 ft at 10:45PM Oct 17, 2019Observed: 2.52 ft at 11:00PM Oct 17, 2019Observed: 2.52 ft at 11:15PM Oct 17, 2019Observed: 2.52 ft at 11:30PM Oct 17, 2019Observed: 2.52 ft at 11:45PM Oct 17, 2019Observed: 2.52 ft at 12:00AM Oct 18, 2019Observed: 2.52 ft at 12:15AM Oct 18, 2019Observed: 2.52 ft at 12:30AM Oct 18, 2019Observed: 2.53 ft at 12:45AM Oct 18, 2019Observed: 2.53 ft at 1:00AM Oct 18, 2019Observed: 2.52 ft at 1:15AM Oct 18, 2019Observed: 2.53 ft at 1:30AM Oct 18, 2019Observed: 2.53 ft at 1:45AM Oct 18, 2019Highest Observation: 2.54 ft at 2:00AM Oct 18, 2019Highest Observation: 2.54 ft at 2:15AM Oct 18, 2019Highest Observation: 2.54 ft at 2:30AM Oct 18, 2019Highest Observation: 2.54 ft at 2:45AM Oct 18, 2019Highest Observation: 2.54 ft at 3:00AM Oct 18, 2019Highest Observation: 2.54 ft at 3:15AM Oct 18, 2019Highest Observation: 2.54 ft at 3:30AM Oct 18, 2019Highest Observation: 2.54 ft at 3:45AM Oct 18, 2019Highest Observation: 2.54 ft at 4:00AM Oct 18, 2019Highest Observation: 2.54 ft at 4:15AM Oct 18, 2019Highest Observation: 2.54 ft at 4:30AM Oct 18, 2019Highest Observation: 2.54 ft at 4:45AM Oct 18, 2019Observed: 2.53 ft at 5:00AM Oct 18, 2019Highest Observation: 2.54 ft at 5:15AM Oct 18, 2019Observed: 2.53 ft at 5:30AM Oct 18, 2019Observed: 2.53 ft at 5:45AM Oct 18, 2019Observed: 2.53 ft at 6:00AM Oct 18, 2019Observed: 2.53 ft at 6:15AM Oct 18, 2019Observed: 2.53 ft at 6:30AM Oct 18, 2019Observed: 2.53 ft at 6:45AM Oct 18, 2019Observed: 2.52 ft at 7:00AM Oct 18, 2019Observed: 2.53 ft at 7:15AM Oct 18, 2019Observed: 2.52 ft at 7:30AM Oct 18, 2019Observed: 2.52 ft at 7:45AM Oct 18, 2019Observed: 2.53 ft at 8:00AM Oct 18, 2019Observed: 2.52 ft at 8:15AM Oct 18, 2019Observed: 2.52 ft at 11:30AM Oct 18, 2019Observed: 2.52 ft at 11:45AM Oct 18, 2019Observed: 2.52 ft at 12:00PM Oct 18, 2019Observed: 2.52 ft at 12:15PM Oct 18, 2019Observed: 2.53 ft at 12:30PM Oct 18, 2019Observed: 2.52 ft at 12:45PM Oct 18, 2019Observed: 2.53 ft at 1:00PM Oct 18, 2019Observed: 2.53 ft at 1:15PM Oct 18, 2019Observed: 2.53 ft at 1:30PM Oct 18, 2019Observed: 2.53 ft at 1:45PM Oct 18, 2019Observed: 2.53 ft at 2:00PM Oct 18, 2019Observed: 2.53 ft at 2:15PM Oct 18, 2019Observed: 2.53 ft at 2:30PM Oct 18, 2019Observed: 2.53 ft at 2:45PM Oct 18, 2019Observed: 2.53 ft at 3:00PM Oct 18, 2019Observed: 2.53 ft at 3:15PM Oct 18, 2019Forecast: 2.53 ft 6:00PM Oct 18, 2019Forecast: 2.53 ft 12:00AM Oct 19, 2019Forecast: 2.53 ft 6:00AM Oct 19, 2019Forecast: 2.55 ft 12:00PM Oct 19, 2019Forecast: 2.6 ft 6:00PM Oct 19, 2019Forecast: 2.65 ft 12:00AM Oct 20, 2019Forecast: 2.68 ft 6:00AM Oct 20, 2019Highest Forecast: 2.7 ft 12:00PM Oct 20, 2019Highest Forecast: 2.7 ft 6:00PM Oct 20, 2019Forecast: 2.69 ft 12:00AM Oct 21, 2019Forecast: 2.66 ft 6:00AM Oct 21, 2019Forecast: 2.63 ft 12:00PM Oct 21, 2019Forecast: 2.61 ft 6:00PM Oct 21, 2019Forecast: 2.59 ft 12:00AM Oct 22, 2019Forecast: 2.57 ft 6:00AM Oct 22, 2019Forecast: 2.56 ft 12:00PM Oct 22, 2019Forecast: 2.54 ft 6:00PM Oct 22, 2019Forecast: 2.53 ft 12:00AM Oct 23, 2019Forecast: 2.52 ft 6:00AM Oct 23, 2019Forecast: 2.51 ft 12:00PM Oct 23, 2019Forecast: 2.49 ft 6:00PM Oct 23, 2019Forecast: 2.48 ft 12:00AM Oct 24, 2019Forecast: 2.46 ft 6:00AM Oct 24, 2019Forecast: 2.45 ft 12:00PM Oct 24, 2019Forecast: 2.44 ft 6:00PM Oct 24, 2019Forecast: 2.43 ft 12:00AM Oct 25, 2019Forecast: 2.42 ft 6:00AM Oct 25, 2019Forecast: 2.42 ft 12:00PM Oct 25, 2019USGS--Water Resources of the United StatesTOPI1(plotting HGIRG) Graph Created (5:48PM Oct 18, 2019)ObservedForecast (issued 9:29AM Oct 18)Latest observed value: 2.53 ft at 3:15 PM MDT 18-Oct-2019. Flood Stage is 4 ft
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About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts are not available for the Portneuf River at Topaz. Only observed stages are available for this point.
Return to Area Map
Downstream Gauge Downstream Gauge - at Pocatello
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 4
Action Stage: 3.5
Low Stage (in feet): -9999

Historic Crests
(1) 6.00 ft on 12/23/1964
(2) 5.71 ft on 02/25/1957
(3) 5.59 ft on 02/20/1980
(4) 5.56 ft on 01/22/1969
(5) 5.42 ft on 05/21/1984
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 4.92 ft on 03/23/2018 (P)
(2) 4.51 ft on 02/22/2017
(3) 3.17 ft on 04/14/2016
(4) 2.92 ft on 05/16/2015
(5) 3.55 ft on 02/15/2014
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 2.10 ft on 09/25/1994

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
4.02 or 641 cfs... Lowland and crop field flooding possible from Pebble Creek to Inkom.
3.5 or 427 cfs... Near bankfull from Pebble Creek Road downstream to Inkom. Isolated ponding in flat areas near Symons Road.
About This Location Collapse

Latitude: 42.625106° N, Longitude: 112.087961° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 4 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 4918 ft 4819 ft  

Current/Historical Observations:
Additional Information Collapse
Historical Peak Flows     (Scroll to Streamflow Statistics for more years)
USGS Historical Peak Flows Explanation
Graphical View of Historical Peak Flows and Gage Analysis 

25   Year Peak Flood 1610 CFS or 5.53 ft
50   Year Peak Flood 2100 CFS
100 Year Peak Flood 2730 CFS
200 Year Peak Flood 3510 CFS
500 Year Peak Flood 4860 CFS

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
Pocatello Weather Forecast Office
1945 Beechcraft Ave
Pocatello, ID 83204
(208) 232-9306
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