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Hydrograph River at a Glance Download
Portneuf River at Pocatello Stage (ft)Flow (cfs)Observed: 10.22 ft at 2:30PM May 02, 2024Highest Observation: 10.27 ft at 2:45PM May 02, 2024Observed: 10.2 ft at 3:00PM May 02, 2024Highest Observation: 10.27 ft at 3:15PM May 02, 2024Observed: 10.26 ft at 3:30PM May 02, 2024Observed: 10.26 ft at 3:45PM May 02, 2024Observed: 10.24 ft at 4:00PM May 02, 2024Observed: 10.18 ft at 4:15PM May 02, 2024Observed: 10.19 ft at 4:30PM May 02, 2024Observed: 10.17 ft at 4:45PM May 02, 2024Observed: 10.24 ft at 5:00PM May 02, 2024Observed: 10.13 ft at 5:15PM May 02, 2024Observed: 10.15 ft at 5:30PM May 02, 2024Observed: 10.14 ft at 5:45PM May 02, 2024Observed: 10.14 ft at 6:00PM May 02, 2024Observed: 10.15 ft at 6:15PM May 02, 2024Observed: 10.13 ft at 6:30PM May 02, 2024Observed: 10.14 ft at 6:45PM May 02, 2024Observed: 10.14 ft at 7:00PM May 02, 2024Observed: 10.13 ft at 7:15PM May 02, 2024Observed: 10.13 ft at 7:30PM May 02, 2024Observed: 10.13 ft at 7:45PM May 02, 2024Observed: 10.13 ft at 8:00PM May 02, 2024Observed: 10.12 ft at 8:15PM May 02, 2024Observed: 10.12 ft at 8:30PM May 02, 2024Observed: 10.12 ft at 8:45PM May 02, 2024Observed: 10.12 ft at 9:00PM May 02, 2024Observed: 10.13 ft at 9:15PM May 02, 2024Observed: 10.12 ft at 9:30PM May 02, 2024Observed: 10.12 ft at 9:45PM May 02, 2024Observed: 10.12 ft at 10:00PM May 02, 2024Observed: 10.11 ft at 10:15PM May 02, 2024Observed: 10.16 ft at 10:30PM May 02, 2024Observed: 10.1 ft at 10:45PM May 02, 2024Observed: 10.11 ft at 11:00PM May 02, 2024Observed: 10.16 ft at 11:15PM May 02, 2024Observed: 10.16 ft at 11:30PM May 02, 2024Observed: 10.21 ft at 11:45PM May 02, 2024Observed: 10.2 ft at 12:00AM May 03, 2024Observed: 10.19 ft at 12:15AM May 03, 2024Observed: 10.2 ft at 12:30AM May 03, 2024Observed: 10.2 ft at 12:45AM May 03, 2024Observed: 10.19 ft at 1:00AM May 03, 2024Observed: 10.19 ft at 1:15AM May 03, 2024Observed: 10.18 ft at 1:30AM May 03, 2024Observed: 10.17 ft at 1:45AM May 03, 2024Observed: 10.19 ft at 2:00AM May 03, 2024Observed: 10.19 ft at 2:15AM May 03, 2024Observed: 10.19 ft at 2:30AM May 03, 2024Observed: 10.18 ft at 2:45AM May 03, 2024Observed: 10.17 ft at 3:00AM May 03, 2024Observed: 10.16 ft at 3:15AM May 03, 2024Observed: 10.17 ft at 3:30AM May 03, 2024Observed: 10.15 ft at 3:45AM May 03, 2024Observed: 10.15 ft at 4:00AM May 03, 2024Observed: 10.14 ft at 4:15AM May 03, 2024Observed: 10.14 ft at 4:30AM May 03, 2024Observed: 10.16 ft at 4:45AM May 03, 2024Observed: 10.15 ft at 5:00AM May 03, 2024Observed: 10.14 ft at 5:15AM May 03, 2024Observed: 10.17 ft at 5:30AM May 03, 2024Observed: 10.17 ft at 5:45AM May 03, 2024Observed: 10.16 ft at 6:00AM May 03, 2024Observed: 10.16 ft at 6:15AM May 03, 2024Observed: 10.17 ft at 6:30AM May 03, 2024Observed: 10.16 ft at 6:45AM May 03, 2024Observed: 10.17 ft at 7:00AM May 03, 2024Observed: 10.18 ft at 7:15AM May 03, 2024Observed: 10.17 ft at 7:30AM May 03, 2024Observed: 10.18 ft at 7:45AM May 03, 2024Observed: 10.17 ft at 8:00AM May 03, 2024Observed: 10.16 ft at 8:15AM May 03, 2024Observed: 10.18 ft at 8:30AM May 03, 2024Observed: 10.14 ft at 8:45AM May 03, 2024Observed: 10.13 ft at 9:00AM May 03, 2024Observed: 10.12 ft at 9:15AM May 03, 2024Observed: 10.11 ft at 9:30AM May 03, 2024Observed: 10.11 ft at 9:45AM May 03, 2024Observed: 10.11 ft at 10:00AM May 03, 2024Observed: 10.11 ft at 10:15AM May 03, 2024Observed: 10.11 ft at 10:30AM May 03, 2024Observed: 10.09 ft at 10:45AM May 03, 2024Observed: 10.08 ft at 11:00AM May 03, 2024Observed: 10.11 ft at 11:15AM May 03, 2024Observed: 10.11 ft at 11:30AM May 03, 2024Observed: 10.08 ft at 11:45AM May 03, 2024Observed: 10.03 ft at 12:00PM May 03, 2024Observed: 10.05 ft at 12:15PM May 03, 2024Observed: 10.06 ft at 12:30PM May 03, 2024Observed: 10.05 ft at 12:45PM May 03, 2024Observed: 10.05 ft at 1:00PM May 03, 2024Observed: 10.04 ft at 1:15PM May 03, 2024Observed: 10.08 ft at 1:30PM May 03, 2024Observed: 10.08 ft at 1:45PM May 03, 2024Observed: 10.02 ft at 2:00PM May 03, 2024Observed: 10.03 ft at 2:15PM May 03, 2024Observed: 10.03 ft at 2:30PM May 03, 2024Observed: 10.03 ft at 2:45PM May 03, 2024Observed: 10.03 ft at 3:00PM May 03, 2024Observed: 10.01 ft at 3:15PM May 03, 2024Observed: 10.05 ft at 3:30PM May 03, 2024Observed: 10.06 ft at 3:45PM May 03, 2024Observed: 10.04 ft at 4:00PM May 03, 2024Observed: 10.04 ft at 4:15PM May 03, 2024Observed: 9.99 ft at 4:30PM May 03, 2024Observed: 10.04 ft at 4:45PM May 03, 2024Observed: 10.06 ft at 5:00PM May 03, 2024Observed: 10 ft at 5:15PM May 03, 2024Observed: 10.03 ft at 5:30PM May 03, 2024Observed: 10.01 ft at 5:45PM May 03, 2024Observed: 9.99 ft at 6:00PM May 03, 2024Observed: 10.01 ft at 6:15PM May 03, 2024Observed: 10.01 ft at 6:30PM May 03, 2024Observed: 9.93 ft at 6:45PM May 03, 2024Observed: 9.91 ft at 7:00PM May 03, 2024Observed: 9.92 ft at 7:15PM May 03, 2024Observed: 9.92 ft at 7:30PM May 03, 2024Observed: 9.94 ft at 7:45PM May 03, 2024Observed: 9.91 ft at 8:00PM May 03, 2024Observed: 9.92 ft at 8:15PM May 03, 2024Observed: 9.92 ft at 8:30PM May 03, 2024Observed: 9.92 ft at 8:45PM May 03, 2024Observed: 9.92 ft at 9:00PM May 03, 2024Observed: 9.91 ft at 9:15PM May 03, 2024Observed: 9.88 ft at 9:30PM May 03, 2024Observed: 9.94 ft at 9:45PM May 03, 2024Observed: 9.91 ft at 10:00PM May 03, 2024Observed: 9.88 ft at 10:15PM May 03, 2024Observed: 9.88 ft at 10:30PM May 03, 2024Observed: 9.88 ft at 10:45PM May 03, 2024Observed: 9.88 ft at 11:00PM May 03, 2024Observed: 9.86 ft at 11:15PM May 03, 2024Observed: 9.86 ft at 11:30PM May 03, 2024Observed: 9.87 ft at 11:45PM May 03, 2024Observed: 9.86 ft at 12:00AM May 04, 2024Observed: 9.86 ft at 12:15AM May 04, 2024Observed: 9.86 ft at 12:30AM May 04, 2024Observed: 9.82 ft at 12:45AM May 04, 2024Observed: 9.82 ft at 1:00AM May 04, 2024Observed: 9.84 ft at 1:15AM May 04, 2024Observed: 9.84 ft at 1:30AM May 04, 2024Observed: 9.84 ft at 1:45AM May 04, 2024Observed: 9.82 ft at 2:00AM May 04, 2024Observed: 9.81 ft at 2:15AM May 04, 2024Observed: 9.83 ft at 2:30AM May 04, 2024Observed: 9.85 ft at 2:45AM May 04, 2024Observed: 9.86 ft at 3:00AM May 04, 2024Observed: 9.89 ft at 3:15AM May 04, 2024Observed: 9.82 ft at 3:30AM May 04, 2024Observed: 9.8 ft at 3:45AM May 04, 2024Observed: 9.79 ft at 4:00AM May 04, 2024Observed: 9.8 ft at 4:15AM May 04, 2024Observed: 9.8 ft at 4:30AM May 04, 2024Observed: 9.86 ft at 4:45AM May 04, 2024Observed: 9.84 ft at 5:00AM May 04, 2024Observed: 9.85 ft at 5:15AM May 04, 2024Observed: 9.79 ft at 5:30AM May 04, 2024Observed: 9.79 ft at 5:45AM May 04, 2024Observed: 9.8 ft at 6:00AM May 04, 2024Observed: 9.78 ft at 6:15AM May 04, 2024Observed: 9.79 ft at 6:30AM May 04, 2024Observed: 9.78 ft at 6:45AM May 04, 2024Observed: 9.78 ft at 7:00AM May 04, 2024Observed: 9.79 ft at 7:15AM May 04, 2024Observed: 9.77 ft at 7:30AM May 04, 2024Observed: 9.76 ft at 7:45AM May 04, 2024Observed: 9.78 ft at 8:00AM May 04, 2024Observed: 9.76 ft at 8:15AM May 04, 2024Observed: 9.76 ft at 8:30AM May 04, 2024Observed: 9.78 ft at 8:45AM May 04, 2024Observed: 9.77 ft at 9:00AM May 04, 2024Observed: 9.77 ft at 9:15AM May 04, 2024Observed: 9.78 ft at 9:30AM May 04, 2024Observed: 9.78 ft at 9:45AM May 04, 2024Observed: 9.76 ft at 10:00AM May 04, 2024Observed: 9.77 ft at 10:15AM May 04, 2024Observed: 9.77 ft at 10:30AM May 04, 2024Observed: 9.77 ft at 10:45AM May 04, 2024Observed: 9.76 ft at 11:00AM May 04, 2024Observed: 9.75 ft at 11:15AM May 04, 2024Observed: 9.77 ft at 11:30AM May 04, 2024Observed: 9.75 ft at 11:45AM May 04, 2024Observed: 9.75 ft at 12:00PM May 04, 2024Observed: 9.75 ft at 12:15PM May 04, 2024Observed: 9.74 ft at 12:30PM May 04, 2024Observed: 9.77 ft at 12:45PM May 04, 2024Observed: 9.75 ft at 1:00PM May 04, 2024Observed: 9.75 ft at 1:15PM May 04, 2024Observed: 9.74 ft at 1:30PM May 04, 2024Observed: 9.75 ft at 1:45PM May 04, 2024Observed: 9.74 ft at 2:00PM May 04, 2024Observed: 9.75 ft at 2:15PM May 04, 2024Observed: 9.74 ft at 2:30PM May 04, 2024Observed: 9.74 ft at 2:45PM May 04, 2024Observed: 9.73 ft at 3:00PM May 04, 2024Observed: 9.74 ft at 3:15PM May 04, 2024Observed: 9.72 ft at 3:30PM May 04, 2024Observed: 9.73 ft at 3:45PM May 04, 2024Observed: 9.73 ft at 4:00PM May 04, 2024Observed: 9.71 ft at 4:15PM May 04, 2024Observed: 9.72 ft at 4:30PM May 04, 2024Observed: 9.71 ft at 4:45PM May 04, 2024Observed: 9.69 ft at 5:00PM May 04, 2024Observed: 9.69 ft at 5:15PM May 04, 2024Observed: 9.7 ft at 5:30PM May 04, 2024Observed: 9.71 ft at 5:45PM May 04, 2024Observed: 9.69 ft at 6:00PM May 04, 2024Observed: 9.72 ft at 6:15PM May 04, 2024Observed: 9.71 ft at 6:30PM May 04, 2024Observed: 9.7 ft at 6:45PM May 04, 2024Observed: 9.69 ft at 7:00PM May 04, 2024Observed: 9.69 ft at 7:15PM May 04, 2024Observed: 9.69 ft at 7:30PM May 04, 2024Observed: 9.67 ft at 7:45PM May 04, 2024Observed: 9.71 ft at 8:00PM May 04, 2024Observed: 9.73 ft at 8:15PM May 04, 2024Observed: 9.72 ft at 8:30PM May 04, 2024Observed: 9.7 ft at 8:45PM May 04, 2024Observed: 9.67 ft at 9:00PM May 04, 2024Observed: 9.7 ft at 9:15PM May 04, 2024Observed: 9.69 ft at 9:30PM May 04, 2024Observed: 9.71 ft at 9:45PM May 04, 2024Observed: 9.71 ft at 10:00PM May 04, 2024Observed: 9.67 ft at 10:15PM May 04, 2024Observed: 9.67 ft at 10:30PM May 04, 2024Observed: 9.67 ft at 10:45PM May 04, 2024Observed: 9.66 ft at 11:00PM May 04, 2024Observed: 9.67 ft at 11:15PM May 04, 2024Observed: 9.66 ft at 11:30PM May 04, 2024Observed: 9.64 ft at 11:45PM May 04, 2024Observed: 9.66 ft at 12:00AM May 05, 2024Observed: 9.65 ft at 12:15AM May 05, 2024Observed: 9.64 ft at 12:30AM May 05, 2024Observed: 9.64 ft at 12:45AM May 05, 2024Observed: 9.61 ft at 1:00AM May 05, 2024Observed: 9.62 ft at 1:15AM May 05, 2024Observed: 9.61 ft at 1:30AM May 05, 2024Observed: 9.6 ft at 1:45AM May 05, 2024Observed: 9.63 ft at 2:00AM May 05, 2024Observed: 9.62 ft at 2:15AM May 05, 2024Observed: 9.62 ft at 2:30AM May 05, 2024Observed: 9.61 ft at 2:45AM May 05, 2024Observed: 9.62 ft at 3:00AM May 05, 2024Observed: 9.61 ft at 3:15AM May 05, 2024Observed: 9.62 ft at 3:30AM May 05, 2024Observed: 9.62 ft at 3:45AM May 05, 2024Observed: 9.63 ft at 4:00AM May 05, 2024Observed: 9.63 ft at 4:15AM May 05, 2024Observed: 9.63 ft at 4:30AM May 05, 2024Observed: 9.63 ft at 4:45AM May 05, 2024Observed: 9.63 ft at 5:00AM May 05, 2024Observed: 9.62 ft at 5:15AM May 05, 2024Observed: 9.61 ft at 5:30AM May 05, 2024Observed: 9.61 ft at 5:45AM May 05, 2024Observed: 9.61 ft at 6:00AM May 05, 2024Observed: 9.61 ft at 6:15AM May 05, 2024Observed: 9.6 ft at 6:30AM May 05, 2024Observed: 9.59 ft at 6:45AM May 05, 2024Observed: 9.6 ft at 7:00AM May 05, 2024Observed: 9.6 ft at 7:15AM May 05, 2024Observed: 9.61 ft at 7:30AM May 05, 2024Observed: 9.6 ft at 7:45AM May 05, 2024Observed: 9.6 ft at 8:00AM May 05, 2024Observed: 9.6 ft at 8:15AM May 05, 2024Observed: 9.6 ft at 8:30AM May 05, 2024Observed: 9.61 ft at 8:45AM May 05, 2024Observed: 9.61 ft at 9:00AM May 05, 2024Observed: 9.61 ft at 9:15AM May 05, 2024Observed: 9.61 ft at 9:30AM May 05, 2024Observed: 9.6 ft at 9:45AM May 05, 2024Observed: 9.6 ft at 10:00AM May 05, 2024Observed: 9.59 ft at 10:15AM May 05, 2024Observed: 9.6 ft at 10:30AM May 05, 2024Observed: 9.61 ft at 10:45AM May 05, 2024Observed: 9.61 ft at 11:00AM May 05, 2024Observed: 9.6 ft at 11:15AM May 05, 2024Observed: 9.59 ft at 11:30AM May 05, 2024Observed: 9.59 ft at 11:45AM May 05, 2024Observed: 9.6 ft at 12:00PM May 05, 2024Observed: 9.59 ft at 12:15PM May 05, 2024Observed: 9.58 ft at 12:30PM May 05, 2024Observed: 9.58 ft at 12:45PM May 05, 2024Observed: 9.58 ft at 1:00PM May 05, 2024Forecast: 9.9 ft 6:00PM May 05, 2024Forecast: 10.29 ft 12:00AM May 06, 2024Forecast: 10.52 ft 6:00AM May 06, 2024Forecast: 10.53 ft 12:00PM May 06, 2024Forecast: 10.54 ft 6:00PM May 06, 2024Forecast: 10.59 ft 12:00AM May 07, 2024Forecast: 10.64 ft 6:00AM May 07, 2024Highest Forecast: 10.67 ft 12:00PM May 07, 2024Forecast: 10.65 ft 6:00PM May 07, 2024Forecast: 10.6 ft 12:00AM May 08, 2024Forecast: 10.54 ft 6:00AM May 08, 2024Forecast: 10.43 ft 12:00PM May 08, 2024Forecast: 10.33 ft 6:00PM May 08, 2024Forecast: 10.26 ft 12:00AM May 09, 2024Forecast: 10.22 ft 6:00AM May 09, 2024Forecast: 10.11 ft 12:00PM May 09, 2024Forecast: 10.06 ft 6:00PM May 09, 2024Forecast: 10.08 ft 12:00AM May 10, 2024Forecast: 10.11 ft 6:00AM May 10, 2024Forecast: 10.08 ft 12:00PM May 10, 2024Forecast: 10.07 ft 6:00PM May 10, 2024Forecast: 10.11 ft 12:00AM May 11, 2024Forecast: 10.14 ft 6:00AM May 11, 2024Forecast: 10.1 ft 12:00PM May 11, 2024Forecast: 10.09 ft 6:00PM May 11, 2024Forecast: 10.1 ft 12:00AM May 12, 2024Forecast: 10.1 ft 6:00AM May 12, 2024Forecast: 10.05 ft 12:00PM May 12, 2024USGS--Water Resources of the United StatesPIHI1(plotting HGIRZ) Graph Created (2:18PM May 5, 2024)ObservedForecast (issued 9:25AM May 5)Latest observed value: 9.58 ft at 1:00 PM MDT 5-May-2024. Flood Stage is 8.5 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts for the Portneuf River at Pocatello are issued routinely year-round.
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Upstream Locations Upstream Gauge Downstream Gauge Downstream Gauge - at Tyhee
Flood Categories (in feet)
Major Flood Stage: 11
Moderate Flood Stage: 10
Flood Stage: 8.5
Action Stage: 8
Low Stage (in feet): -9999

Historic Crests
(1) 13.85 ft on 05/17/1984
(2) 11.19 ft on 05/31/1983
(3) 11.14 ft on 05/30/2023
(4) 10.52 ft on 05/03/2006
(5) 9.95 ft on 05/27/2011
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 11.14 ft on 05/30/2023
(2) 5.43 ft on 05/08/2022
(3) 5.31 ft on 03/20/2021
(4) 6.97 ft on 05/02/2020
(5) 9.26 ft on 04/27/2019
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:14
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
10 Significant flooding of agricultural land will occur from the Inkom and Blackrock area. Lowland flooding will occur along sections of the river in Pocatello from Portneuf Gap to the Cheyenne Avenue Bridge and downstream of the concrete channel beginning at Sacajawea Park.
9.4 Water will encroach around sitting benches near the river at the Pacific Recycling Trailhead.
9.15 Flooding of low lying agricultural land and pasture will occur in the Inkom and Blackrock area. Lowland flooding is likely along sections of the river between Portneuf Gap and the Cheyenne Avenue Bridge in Pocatello.
8.5 Sections of Sacajawea Park will be under water and the trail is usually closed at this level. Marsh Creek near Inkom may also be over its banks.
8 Water will encroach onto portions of the bike and walking trail next to the river in Sacajawea Park in Pocatello.
Photos
(1) PIHI1_googleearth
(2) PIHI1_map
(3) PIHI1_gagehouse_surveycable
(4) PIHI1_looking_upstream
(5) PIHI1_looking_downstream
(6) PIHI1_lookingstraightfromgage
(7) PIHI1_portneuf_river_canal
(8) PIHI1_portneuf_areal_canal
(9) PIHI1
About This Location Collapse

Latitude: 42.871614° N, Longitude: 112.468206° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 8.5 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 4418.41 ft 4426.91 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
Portneuf USGS Webcam   
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 2010 CFS or 11.97 ft
50   Year Peak Flood 2440 CFS or 12.69 ft
100 Year Peak Flood 2930 CFS or 13.27 ft
200 Year Peak Flood 3490 CFS or 13.82 ft
500 Year Peak Flood 4360 CFS or 14.54 ft
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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