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Hydrograph River at a Glance Download
Portneuf River at Topaz Stage (ft)Flow (cfs)Observed: 3.09 ft at 11:15PM May 24, 2020Highest Observation: 3.1 ft at 11:30PM May 24, 2020Highest Observation: 3.1 ft at 11:45PM May 24, 2020Observed: 3.09 ft at 12:00AM May 25, 2020Highest Observation: 3.1 ft at 12:15AM May 25, 2020Observed: 3.09 ft at 12:30AM May 25, 2020Highest Observation: 3.1 ft at 12:45AM May 25, 2020Observed: 3.09 ft at 1:00AM May 25, 2020Highest Observation: 3.1 ft at 1:15AM May 25, 2020Observed: 3.09 ft at 1:30AM May 25, 2020Observed: 3.08 ft at 1:45AM May 25, 2020Observed: 3.09 ft at 2:00AM May 25, 2020Observed: 3.09 ft at 2:15AM May 25, 2020Observed: 3.09 ft at 2:30AM May 25, 2020Observed: 3.09 ft at 2:45AM May 25, 2020Observed: 3.09 ft at 3:00AM May 25, 2020Observed: 3.08 ft at 3:15AM May 25, 2020Observed: 3.09 ft at 3:30AM May 25, 2020Observed: 3.08 ft at 3:45AM May 25, 2020Observed: 3.08 ft at 4:00AM May 25, 2020Observed: 3.07 ft at 4:15AM May 25, 2020Observed: 3.08 ft at 4:30AM May 25, 2020Observed: 3.07 ft at 4:45AM May 25, 2020Observed: 3.07 ft at 5:00AM May 25, 2020Observed: 3.08 ft at 5:15AM May 25, 2020Observed: 3.07 ft at 5:30AM May 25, 2020Observed: 3.07 ft at 5:45AM May 25, 2020Observed: 3.06 ft at 6:00AM May 25, 2020Observed: 3.07 ft at 6:15AM May 25, 2020Observed: 3.07 ft at 6:30AM May 25, 2020Observed: 3.07 ft at 6:45AM May 25, 2020Observed: 3.07 ft at 7:00AM May 25, 2020Observed: 3.07 ft at 7:15AM May 25, 2020Observed: 3.07 ft at 7:30AM May 25, 2020Observed: 3.07 ft at 7:45AM May 25, 2020Observed: 3.07 ft at 8:00AM May 25, 2020Observed: 3.07 ft at 8:15AM May 25, 2020Observed: 3.07 ft at 8:30AM May 25, 2020Observed: 3.07 ft at 8:45AM May 25, 2020Observed: 3.08 ft at 9:00AM May 25, 2020Observed: 3.06 ft at 9:15AM May 25, 2020Observed: 3.06 ft at 9:30AM May 25, 2020Observed: 3.06 ft at 9:45AM May 25, 2020Observed: 3.06 ft at 10:00AM May 25, 2020Observed: 3.06 ft at 10:15AM May 25, 2020Observed: 3.06 ft at 10:30AM May 25, 2020Observed: 3.06 ft at 10:45AM May 25, 2020Observed: 3.06 ft at 11:00AM May 25, 2020Observed: 3.06 ft at 11:15AM May 25, 2020Observed: 3.06 ft at 11:30AM May 25, 2020Observed: 3.06 ft at 11:45AM May 25, 2020Observed: 3.06 ft at 12:00PM May 25, 2020Observed: 3.06 ft at 12:15PM May 25, 2020Observed: 3.06 ft at 12:30PM May 25, 2020Observed: 3.07 ft at 12:45PM May 25, 2020Observed: 3.05 ft at 1:00PM May 25, 2020Observed: 3.06 ft at 1:15PM May 25, 2020Observed: 3.05 ft at 1:30PM May 25, 2020Observed: 3.07 ft at 1:45PM May 25, 2020Observed: 3.05 ft at 2:00PM May 25, 2020Observed: 3.05 ft at 2:15PM May 25, 2020Observed: 3.06 ft at 2:30PM May 25, 2020Observed: 3.05 ft at 2:45PM May 25, 2020Observed: 3.05 ft at 3:00PM May 25, 2020Observed: 3.06 ft at 3:15PM May 25, 2020Observed: 3.04 ft at 3:30PM May 25, 2020Observed: 3.04 ft at 3:45PM May 25, 2020Observed: 3.04 ft at 4:00PM May 25, 2020Observed: 3.04 ft at 4:15PM May 25, 2020Observed: 3.04 ft at 4:30PM May 25, 2020Observed: 3.05 ft at 4:45PM May 25, 2020Observed: 3.04 ft at 5:00PM May 25, 2020Observed: 3.03 ft at 5:15PM May 25, 2020Observed: 3.04 ft at 5:30PM May 25, 2020Observed: 3.04 ft at 5:45PM May 25, 2020Observed: 3.03 ft at 6:00PM May 25, 2020Observed: 3.03 ft at 6:15PM May 25, 2020Observed: 3.04 ft at 6:30PM May 25, 2020Observed: 3.05 ft at 6:45PM May 25, 2020Observed: 3.04 ft at 7:00PM May 25, 2020Observed: 3.03 ft at 7:15PM May 25, 2020Observed: 3.03 ft at 7:30PM May 25, 2020Observed: 3.03 ft at 7:45PM May 25, 2020Observed: 3.03 ft at 8:00PM May 25, 2020Observed: 3.03 ft at 8:15PM May 25, 2020Observed: 3.03 ft at 8:30PM May 25, 2020Observed: 3.03 ft at 8:45PM May 25, 2020Observed: 3.03 ft at 9:00PM May 25, 2020Observed: 3.04 ft at 9:15PM May 25, 2020Observed: 3.04 ft at 9:30PM May 25, 2020Observed: 3.03 ft at 9:45PM May 25, 2020Observed: 3.04 ft at 10:00PM May 25, 2020Observed: 3.03 ft at 10:15PM May 25, 2020Observed: 3.03 ft at 10:30PM May 25, 2020Observed: 3.04 ft at 10:45PM May 25, 2020Observed: 3.03 ft at 11:00PM May 25, 2020Observed: 3.03 ft at 11:15PM May 25, 2020Observed: 3.03 ft at 11:30PM May 25, 2020Observed: 3.03 ft at 11:45PM May 25, 2020Observed: 3.03 ft at 12:00AM May 26, 2020Observed: 3.03 ft at 12:15AM May 26, 2020Observed: 3.03 ft at 12:30AM May 26, 2020Observed: 3.03 ft at 12:45AM May 26, 2020Observed: 3.02 ft at 1:00AM May 26, 2020Observed: 3.03 ft at 1:15AM May 26, 2020Observed: 3.03 ft at 1:30AM May 26, 2020Observed: 3.02 ft at 1:45AM May 26, 2020Observed: 3.03 ft at 2:00AM May 26, 2020Observed: 3.03 ft at 2:15AM May 26, 2020Observed: 3.02 ft at 2:30AM May 26, 2020Observed: 3.02 ft at 2:45AM May 26, 2020Observed: 3.03 ft at 3:00AM May 26, 2020Observed: 3.03 ft at 3:15AM May 26, 2020Observed: 3.02 ft at 3:30AM May 26, 2020Observed: 3.02 ft at 3:45AM May 26, 2020Observed: 3.02 ft at 4:00AM May 26, 2020Observed: 3.03 ft at 4:15AM May 26, 2020Observed: 3.02 ft at 4:30AM May 26, 2020Observed: 3.02 ft at 4:45AM May 26, 2020Observed: 3.02 ft at 5:00AM May 26, 2020Observed: 3.02 ft at 5:15AM May 26, 2020Observed: 3.02 ft at 5:30AM May 26, 2020Observed: 3.02 ft at 5:45AM May 26, 2020Observed: 3.02 ft at 6:00AM May 26, 2020Observed: 3.02 ft at 6:15AM May 26, 2020Observed: 3.02 ft at 6:30AM May 26, 2020Observed: 3.02 ft at 6:45AM May 26, 2020Observed: 3.02 ft at 7:00AM May 26, 2020Observed: 3.02 ft at 7:15AM May 26, 2020Observed: 3.02 ft at 7:30AM May 26, 2020Observed: 3.02 ft at 7:45AM May 26, 2020Observed: 3.02 ft at 8:00AM May 26, 2020Observed: 3.02 ft at 8:15AM May 26, 2020Observed: 3.02 ft at 8:30AM May 26, 2020Observed: 3.02 ft at 8:45AM May 26, 2020Observed: 3.02 ft at 9:00AM May 26, 2020Observed: 3.02 ft at 9:15AM May 26, 2020Observed: 3.02 ft at 9:30AM May 26, 2020Observed: 3.02 ft at 9:45AM May 26, 2020Observed: 3.02 ft at 10:00AM May 26, 2020Observed: 3.02 ft at 10:15AM May 26, 2020Observed: 3.02 ft at 10:30AM May 26, 2020Observed: 3.02 ft at 10:45AM May 26, 2020Observed: 3.02 ft at 11:00AM May 26, 2020Observed: 3.01 ft at 11:15AM May 26, 2020Observed: 3.02 ft at 11:30AM May 26, 2020Observed: 3.02 ft at 11:45AM May 26, 2020Observed: 3.02 ft at 12:00PM May 26, 2020Observed: 3.02 ft at 12:15PM May 26, 2020Observed: 3.02 ft at 12:30PM May 26, 2020Observed: 3.01 ft at 12:45PM May 26, 2020Observed: 3.02 ft at 1:00PM May 26, 2020Observed: 3.01 ft at 1:15PM May 26, 2020Observed: 3.01 ft at 1:30PM May 26, 2020Observed: 3.01 ft at 1:45PM May 26, 2020Observed: 3.02 ft at 2:00PM May 26, 2020Observed: 3.02 ft at 2:15PM May 26, 2020Observed: 3.01 ft at 2:30PM May 26, 2020Observed: 3 ft at 2:45PM May 26, 2020Observed: 3.01 ft at 3:00PM May 26, 2020Observed: 3.01 ft at 3:15PM May 26, 2020Observed: 3.01 ft at 3:30PM May 26, 2020Observed: 3.01 ft at 3:45PM May 26, 2020Observed: 3.01 ft at 4:00PM May 26, 2020Observed: 3.01 ft at 4:15PM May 26, 2020Observed: 3.01 ft at 4:30PM May 26, 2020Observed: 3.01 ft at 4:45PM May 26, 2020Observed: 3.01 ft at 5:00PM May 26, 2020Observed: 3.01 ft at 5:15PM May 26, 2020Observed: 3.01 ft at 5:30PM May 26, 2020Observed: 3 ft at 5:45PM May 26, 2020Observed: 3 ft at 6:00PM May 26, 2020Observed: 3 ft at 6:15PM May 26, 2020Observed: 3 ft at 6:30PM May 26, 2020Observed: 3 ft at 6:45PM May 26, 2020Observed: 3.01 ft at 7:00PM May 26, 2020Observed: 3 ft at 7:15PM May 26, 2020Observed: 3.01 ft at 7:30PM May 26, 2020Observed: 3 ft at 7:45PM May 26, 2020Observed: 3 ft at 8:00PM May 26, 2020Observed: 3 ft at 8:15PM May 26, 2020Observed: 3 ft at 8:30PM May 26, 2020Observed: 3 ft at 8:45PM May 26, 2020Observed: 3 ft at 9:00PM May 26, 2020Observed: 3 ft at 9:15PM May 26, 2020Observed: 3 ft at 9:30PM May 26, 2020Observed: 2.99 ft at 9:45PM May 26, 2020Observed: 3 ft at 10:00PM May 26, 2020Observed: 3 ft at 10:15PM May 26, 2020Observed: 3 ft at 10:30PM May 26, 2020Observed: 2.99 ft at 10:45PM May 26, 2020Observed: 3 ft at 11:00PM May 26, 2020Observed: 3 ft at 11:15PM May 26, 2020Observed: 3 ft at 11:30PM May 26, 2020Observed: 3 ft at 11:45PM May 26, 2020Observed: 3 ft at 12:00AM May 27, 2020Observed: 3 ft at 12:15AM May 27, 2020Observed: 3 ft at 12:30AM May 27, 2020Observed: 3 ft at 12:45AM May 27, 2020Observed: 2.99 ft at 1:00AM May 27, 2020Observed: 3 ft at 1:15AM May 27, 2020Observed: 3 ft at 1:30AM May 27, 2020Observed: 3 ft at 1:45AM May 27, 2020Observed: 2.99 ft at 2:00AM May 27, 2020Observed: 3 ft at 2:15AM May 27, 2020Observed: 2.99 ft at 2:30AM May 27, 2020Observed: 3 ft at 2:45AM May 27, 2020Observed: 2.99 ft at 3:00AM May 27, 2020Observed: 2.99 ft at 3:15AM May 27, 2020Observed: 2.99 ft at 3:30AM May 27, 2020Observed: 2.99 ft at 3:45AM May 27, 2020Observed: 2.99 ft at 4:00AM May 27, 2020Observed: 2.99 ft at 4:15AM May 27, 2020Observed: 2.99 ft at 4:30AM May 27, 2020Observed: 2.99 ft at 4:45AM May 27, 2020Observed: 2.99 ft at 5:00AM May 27, 2020Observed: 2.99 ft at 5:15AM May 27, 2020Observed: 2.99 ft at 5:30AM May 27, 2020Observed: 2.99 ft at 5:45AM May 27, 2020Observed: 2.99 ft at 6:00AM May 27, 2020Observed: 3 ft at 6:15AM May 27, 2020Observed: 3 ft at 6:30AM May 27, 2020Observed: 2.99 ft at 6:45AM May 27, 2020Observed: 3 ft at 7:00AM May 27, 2020Observed: 2.99 ft at 7:15AM May 27, 2020Observed: 3 ft at 7:30AM May 27, 2020Observed: 3 ft at 7:45AM May 27, 2020Observed: 3.01 ft at 8:00AM May 27, 2020Observed: 3 ft at 8:15AM May 27, 2020Observed: 3 ft at 8:30AM May 27, 2020Observed: 3 ft at 8:45AM May 27, 2020Observed: 3.01 ft at 9:00AM May 27, 2020Observed: 3 ft at 9:15AM May 27, 2020Observed: 3 ft at 9:30AM May 27, 2020Observed: 3 ft at 9:45AM May 27, 2020Observed: 3.01 ft at 10:00AM May 27, 2020Observed: 3.01 ft at 10:15AM May 27, 2020Observed: 3.01 ft at 10:30AM May 27, 2020Observed: 3.01 ft at 10:45AM May 27, 2020Observed: 3.01 ft at 11:00AM May 27, 2020Observed: 3.01 ft at 11:15AM May 27, 2020Observed: 3.01 ft at 11:30AM May 27, 2020Observed: 3.01 ft at 11:45AM May 27, 2020Observed: 3.01 ft at 12:00PM May 27, 2020Observed: 3.01 ft at 12:15PM May 27, 2020Observed: 3.01 ft at 12:30PM May 27, 2020Observed: 3.01 ft at 12:45PM May 27, 2020Observed: 3.01 ft at 1:00PM May 27, 2020Observed: 3 ft at 1:15PM May 27, 2020Observed: 3 ft at 1:30PM May 27, 2020Observed: 3 ft at 1:45PM May 27, 2020Observed: 3 ft at 2:00PM May 27, 2020Observed: 3 ft at 2:15PM May 27, 2020Observed: 2.99 ft at 2:30PM May 27, 2020Observed: 2.99 ft at 2:45PM May 27, 2020Observed: 3 ft at 3:00PM May 27, 2020Observed: 3 ft at 3:15PM May 27, 2020Observed: 3 ft at 3:30PM May 27, 2020Observed: 2.99 ft at 3:45PM May 27, 2020Observed: 3 ft at 4:00PM May 27, 2020Observed: 3 ft at 4:15PM May 27, 2020Observed: 3 ft at 4:30PM May 27, 2020Observed: 3 ft at 4:45PM May 27, 2020Observed: 3 ft at 5:00PM May 27, 2020Observed: 3 ft at 5:15PM May 27, 2020Observed: 3 ft at 5:30PM May 27, 2020Observed: 3 ft at 5:45PM May 27, 2020Observed: 2.99 ft at 6:00PM May 27, 2020Observed: 2.99 ft at 6:15PM May 27, 2020Observed: 2.99 ft at 6:30PM May 27, 2020Observed: 2.99 ft at 6:45PM May 27, 2020Observed: 2.99 ft at 7:00PM May 27, 2020Observed: 2.99 ft at 7:15PM May 27, 2020Observed: 2.99 ft at 7:30PM May 27, 2020Observed: 2.99 ft at 7:45PM May 27, 2020Observed: 2.99 ft at 8:00PM May 27, 2020Observed: 2.99 ft at 8:15PM May 27, 2020Observed: 2.99 ft at 8:30PM May 27, 2020Observed: 2.99 ft at 8:45PM May 27, 2020Observed: 2.99 ft at 9:00PM May 27, 2020Observed: 2.99 ft at 9:15PM May 27, 2020Observed: 2.99 ft at 9:30PM May 27, 2020Observed: 2.99 ft at 9:45PM May 27, 2020Observed: 2.99 ft at 10:00PM May 27, 2020Observed: 2.99 ft at 10:15PM May 27, 2020Highest Forecast: 2.98 ft 12:00AM May 28, 2020Forecast: 2.97 ft 6:00AM May 28, 2020Forecast: 2.95 ft 12:00PM May 28, 2020Forecast: 2.95 ft 6:00PM May 28, 2020Forecast: 2.95 ft 12:00AM May 29, 2020Forecast: 2.94 ft 6:00AM May 29, 2020Forecast: 2.94 ft 12:00PM May 29, 2020Forecast: 2.93 ft 6:00PM May 29, 2020Forecast: 2.94 ft 12:00AM May 30, 2020Forecast: 2.93 ft 6:00AM May 30, 2020Forecast: 2.93 ft 12:00PM May 30, 2020Forecast: 2.93 ft 6:00PM May 30, 2020Forecast: 2.93 ft 12:00AM May 31, 2020Forecast: 2.92 ft 6:00AM May 31, 2020Forecast: 2.92 ft 12:00PM May 31, 2020Forecast: 2.92 ft 6:00PM May 31, 2020Forecast: 2.92 ft 12:00AM Jun 01, 2020Forecast: 2.92 ft 6:00AM Jun 01, 2020Forecast: 2.91 ft 12:00PM Jun 01, 2020Forecast: 2.91 ft 6:00PM Jun 01, 2020Forecast: 2.91 ft 12:00AM Jun 02, 2020Forecast: 2.91 ft 6:00AM Jun 02, 2020Forecast: 2.9 ft 12:00PM Jun 02, 2020Forecast: 2.9 ft 6:00PM Jun 02, 2020Forecast: 2.9 ft 12:00AM Jun 03, 2020Forecast: 2.9 ft 6:00AM Jun 03, 2020Forecast: 2.9 ft 12:00PM Jun 03, 2020Forecast: 2.89 ft 6:00PM Jun 03, 2020USGS--Water Resources of the United StatesTOPI1(plotting HGIRG) Graph Created (11:03PM May 27, 2020)ObservedForecast (issued 5:22PM May 27)Latest observed value: 2.99 ft at 10:15 PM MDT 27-May-2020. 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.
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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

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