Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left Home News Organization
Bookmark and Share Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Southern Idaho Radar

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
    Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 

Web Portal Changes:

Please visit https://www.weather.gov/owp/operations for more information.



Hydrograph River at a Glance Download
Portneuf River at Topaz Stage (ft)Flow (cfs)Observed: 3.9 ft at 10:45AM Apr 16, 2024Observed: 3.9 ft at 11:00AM Apr 16, 2024Observed: 3.89 ft at 11:15AM Apr 16, 2024Observed: 3.89 ft at 11:30AM Apr 16, 2024Observed: 3.88 ft at 11:45AM Apr 16, 2024Observed: 3.88 ft at 12:00PM Apr 16, 2024Observed: 3.88 ft at 12:15PM Apr 16, 2024Observed: 3.88 ft at 12:30PM Apr 16, 2024Observed: 3.88 ft at 12:45PM Apr 16, 2024Observed: 3.88 ft at 1:00PM Apr 16, 2024Observed: 3.88 ft at 1:15PM Apr 16, 2024Observed: 3.88 ft at 1:30PM Apr 16, 2024Observed: 3.87 ft at 1:45PM Apr 16, 2024Observed: 3.87 ft at 2:00PM Apr 16, 2024Observed: 3.86 ft at 2:15PM Apr 16, 2024Observed: 3.86 ft at 2:30PM Apr 16, 2024Observed: 3.86 ft at 2:45PM Apr 16, 2024Observed: 3.86 ft at 3:00PM Apr 16, 2024Observed: 3.86 ft at 3:15PM Apr 16, 2024Observed: 3.87 ft at 3:30PM Apr 16, 2024Observed: 3.86 ft at 3:45PM Apr 16, 2024Observed: 3.85 ft at 4:00PM Apr 16, 2024Observed: 3.88 ft at 4:15PM Apr 16, 2024Observed: 3.87 ft at 4:30PM Apr 16, 2024Observed: 3.84 ft at 4:45PM Apr 16, 2024Observed: 3.86 ft at 5:00PM Apr 16, 2024Observed: 3.85 ft at 5:15PM Apr 16, 2024Observed: 3.86 ft at 5:30PM Apr 16, 2024Observed: 3.86 ft at 5:45PM Apr 16, 2024Observed: 3.89 ft at 6:00PM Apr 16, 2024Observed: 3.86 ft at 6:15PM Apr 16, 2024Observed: 3.87 ft at 6:30PM Apr 16, 2024Observed: 3.86 ft at 6:45PM Apr 16, 2024Observed: 3.85 ft at 7:00PM Apr 16, 2024Observed: 3.86 ft at 7:15PM Apr 16, 2024Observed: 3.87 ft at 7:30PM Apr 16, 2024Observed: 3.85 ft at 7:45PM Apr 16, 2024Observed: 3.86 ft at 8:00PM Apr 16, 2024Observed: 3.86 ft at 8:15PM Apr 16, 2024Observed: 3.87 ft at 8:30PM Apr 16, 2024Observed: 3.87 ft at 8:45PM Apr 16, 2024Observed: 3.87 ft at 9:00PM Apr 16, 2024Observed: 3.88 ft at 9:15PM Apr 16, 2024Observed: 3.9 ft at 10:30PM Apr 16, 2024Observed: 3.9 ft at 10:45PM Apr 16, 2024Observed: 3.91 ft at 11:00PM Apr 16, 2024Observed: 3.91 ft at 11:15PM Apr 16, 2024Observed: 3.93 ft at 11:30PM Apr 16, 2024Observed: 3.94 ft at 11:45PM Apr 16, 2024Observed: 3.92 ft at 12:00AM Apr 17, 2024Observed: 3.92 ft at 12:15AM Apr 17, 2024Observed: 3.95 ft at 12:30AM Apr 17, 2024Observed: 3.95 ft at 12:45AM Apr 17, 2024Observed: 3.96 ft at 1:00AM Apr 17, 2024Observed: 3.99 ft at 1:15AM Apr 17, 2024Observed: 3.99 ft at 1:30AM Apr 17, 2024Observed: 3.95 ft at 1:45AM Apr 17, 2024Observed: 3.97 ft at 2:00AM Apr 17, 2024Observed: 3.97 ft at 2:15AM Apr 17, 2024Observed: 3.96 ft at 2:30AM Apr 17, 2024Observed: 3.96 ft at 2:45AM Apr 17, 2024Observed: 3.97 ft at 3:00AM Apr 17, 2024Highest Observation: 4.01 ft at 3:15AM Apr 17, 2024Observed: 3.99 ft at 3:30AM Apr 17, 2024Observed: 3.97 ft at 3:45AM Apr 17, 2024Observed: 3.99 ft at 4:00AM Apr 17, 2024Observed: 3.98 ft at 4:15AM Apr 17, 2024Observed: 3.95 ft at 4:30AM Apr 17, 2024Observed: 3.96 ft at 4:45AM Apr 17, 2024Observed: 3.95 ft at 5:00AM Apr 17, 2024Observed: 3.94 ft at 5:15AM Apr 17, 2024Observed: 3.94 ft at 5:30AM Apr 17, 2024Observed: 3.96 ft at 5:45AM Apr 17, 2024Observed: 3.94 ft at 6:00AM Apr 17, 2024Observed: 3.95 ft at 6:15AM Apr 17, 2024Observed: 3.94 ft at 6:30AM Apr 17, 2024Observed: 3.93 ft at 6:45AM Apr 17, 2024Observed: 3.93 ft at 7:00AM Apr 17, 2024Observed: 3.94 ft at 7:15AM Apr 17, 2024Observed: 3.94 ft at 7:30AM Apr 17, 2024Observed: 3.93 ft at 7:45AM Apr 17, 2024Observed: 3.93 ft at 8:00AM Apr 17, 2024Observed: 3.92 ft at 8:15AM Apr 17, 2024Observed: 3.91 ft at 9:30AM Apr 17, 2024Observed: 3.91 ft at 9:45AM Apr 17, 2024Observed: 3.92 ft at 10:00AM Apr 17, 2024Observed: 3.91 ft at 10:15AM Apr 17, 2024Observed: 3.91 ft at 10:30AM Apr 17, 2024Observed: 3.91 ft at 10:45AM Apr 17, 2024Observed: 3.9 ft at 11:00AM Apr 17, 2024Observed: 3.9 ft at 11:15AM Apr 17, 2024Observed: 3.9 ft at 11:30AM Apr 17, 2024Observed: 3.9 ft at 11:45AM Apr 17, 2024Observed: 3.9 ft at 12:00PM Apr 17, 2024Observed: 3.89 ft at 12:15PM Apr 17, 2024Observed: 3.89 ft at 12:30PM Apr 17, 2024Observed: 3.89 ft at 12:45PM Apr 17, 2024Observed: 3.89 ft at 1:00PM Apr 17, 2024Observed: 3.88 ft at 1:15PM Apr 17, 2024Observed: 3.9 ft at 2:30PM Apr 17, 2024Observed: 3.89 ft at 2:45PM Apr 17, 2024Observed: 3.89 ft at 3:00PM Apr 17, 2024Observed: 3.88 ft at 3:15PM Apr 17, 2024Observed: 3.89 ft at 3:30PM Apr 17, 2024Observed: 3.9 ft at 3:45PM Apr 17, 2024Observed: 3.9 ft at 4:00PM Apr 17, 2024Observed: 3.89 ft at 4:15PM Apr 17, 2024Observed: 3.89 ft at 4:30PM Apr 17, 2024Observed: 3.89 ft at 4:45PM Apr 17, 2024Observed: 3.88 ft at 5:00PM Apr 17, 2024Observed: 3.89 ft at 5:15PM Apr 17, 2024Observed: 3.89 ft at 5:30PM Apr 17, 2024Observed: 3.9 ft at 5:45PM Apr 17, 2024Observed: 3.9 ft at 6:00PM Apr 17, 2024Observed: 3.9 ft at 6:15PM Apr 17, 2024Observed: 3.89 ft at 6:30PM Apr 17, 2024Observed: 3.89 ft at 6:45PM Apr 17, 2024Observed: 3.89 ft at 7:00PM Apr 17, 2024Observed: 3.88 ft at 7:15PM Apr 17, 2024Observed: 3.89 ft at 7:30PM Apr 17, 2024Observed: 3.89 ft at 7:45PM Apr 17, 2024Observed: 3.9 ft at 8:00PM Apr 17, 2024Observed: 3.89 ft at 8:15PM Apr 17, 2024Observed: 3.9 ft at 8:30PM Apr 17, 2024Observed: 3.89 ft at 8:45PM Apr 17, 2024Observed: 3.9 ft at 9:00PM Apr 17, 2024Observed: 3.89 ft at 9:15PM Apr 17, 2024Observed: 3.9 ft at 9:30PM Apr 17, 2024Observed: 3.9 ft at 9:45PM Apr 17, 2024Observed: 3.9 ft at 10:00PM Apr 17, 2024Observed: 3.89 ft at 10:15PM Apr 17, 2024Observed: 3.9 ft at 10:30PM Apr 17, 2024Observed: 3.9 ft at 10:45PM Apr 17, 2024Observed: 3.91 ft at 11:00PM Apr 17, 2024Observed: 3.91 ft at 11:15PM Apr 17, 2024Observed: 3.91 ft at 11:30PM Apr 17, 2024Observed: 3.91 ft at 11:45PM Apr 17, 2024Observed: 3.92 ft at 12:00AM Apr 18, 2024Observed: 3.92 ft at 12:15AM Apr 18, 2024Observed: 3.92 ft at 12:30AM Apr 18, 2024Observed: 3.92 ft at 12:45AM Apr 18, 2024Observed: 3.93 ft at 1:00AM Apr 18, 2024Observed: 3.93 ft at 1:15AM Apr 18, 2024Observed: 3.92 ft at 1:30AM Apr 18, 2024Observed: 3.93 ft at 1:45AM Apr 18, 2024Observed: 3.92 ft at 2:00AM Apr 18, 2024Observed: 3.93 ft at 2:15AM Apr 18, 2024Observed: 3.93 ft at 2:30AM Apr 18, 2024Observed: 3.93 ft at 2:45AM Apr 18, 2024Observed: 3.93 ft at 3:00AM Apr 18, 2024Observed: 3.92 ft at 3:15AM Apr 18, 2024Observed: 3.93 ft at 3:30AM Apr 18, 2024Observed: 3.93 ft at 3:45AM Apr 18, 2024Observed: 3.93 ft at 4:00AM Apr 18, 2024Observed: 3.92 ft at 4:15AM Apr 18, 2024Observed: 3.92 ft at 4:30AM Apr 18, 2024Observed: 3.92 ft at 4:45AM Apr 18, 2024Observed: 3.92 ft at 5:00AM Apr 18, 2024Observed: 3.92 ft at 5:15AM Apr 18, 2024Observed: 3.93 ft at 5:30AM Apr 18, 2024Observed: 3.93 ft at 5:45AM Apr 18, 2024Observed: 3.93 ft at 6:00AM Apr 18, 2024Observed: 3.93 ft at 6:15AM Apr 18, 2024Observed: 3.93 ft at 6:30AM Apr 18, 2024Observed: 3.92 ft at 6:45AM Apr 18, 2024Observed: 3.93 ft at 7:00AM Apr 18, 2024Observed: 3.92 ft at 7:15AM Apr 18, 2024Observed: 3.92 ft at 7:30AM Apr 18, 2024Observed: 3.92 ft at 7:45AM Apr 18, 2024Observed: 3.93 ft at 8:00AM Apr 18, 2024Observed: 3.91 ft at 8:15AM Apr 18, 2024Observed: 3.92 ft at 8:30AM Apr 18, 2024Observed: 3.91 ft at 8:45AM Apr 18, 2024Observed: 3.91 ft at 9:00AM Apr 18, 2024Observed: 3.9 ft at 9:15AM Apr 18, 2024Observed: 3.91 ft at 9:30AM Apr 18, 2024Observed: 3.89 ft at 9:45AM Apr 18, 2024Observed: 3.89 ft at 10:00AM Apr 18, 2024Observed: 3.89 ft at 10:15AM Apr 18, 2024Observed: 3.9 ft at 10:30AM Apr 18, 2024Observed: 3.9 ft at 10:45AM Apr 18, 2024Observed: 3.9 ft at 11:00AM Apr 18, 2024Observed: 3.9 ft at 11:15AM Apr 18, 2024Observed: 3.9 ft at 11:30AM Apr 18, 2024Observed: 3.9 ft at 11:45AM Apr 18, 2024Observed: 3.9 ft at 12:00PM Apr 18, 2024Observed: 3.91 ft at 12:15PM Apr 18, 2024Observed: 3.9 ft at 12:30PM Apr 18, 2024Observed: 3.89 ft at 12:45PM Apr 18, 2024Observed: 3.89 ft at 1:00PM Apr 18, 2024Observed: 3.9 ft at 1:15PM Apr 18, 2024Observed: 3.89 ft at 1:30PM Apr 18, 2024Observed: 3.89 ft at 1:45PM Apr 18, 2024Observed: 3.88 ft at 2:00PM Apr 18, 2024Observed: 3.89 ft at 2:15PM Apr 18, 2024Observed: 3.89 ft at 2:30PM Apr 18, 2024Observed: 3.89 ft at 2:45PM Apr 18, 2024Observed: 3.88 ft at 3:00PM Apr 18, 2024Observed: 3.88 ft at 3:15PM Apr 18, 2024Observed: 3.88 ft at 3:30PM Apr 18, 2024Observed: 3.88 ft at 3:45PM Apr 18, 2024Observed: 3.88 ft at 4:00PM Apr 18, 2024Observed: 3.88 ft at 4:15PM Apr 18, 2024Observed: 3.88 ft at 4:30PM Apr 18, 2024Observed: 3.87 ft at 4:45PM Apr 18, 2024Observed: 3.87 ft at 5:00PM Apr 18, 2024Observed: 3.86 ft at 5:15PM Apr 18, 2024Observed: 3.87 ft at 5:30PM Apr 18, 2024Observed: 3.87 ft at 5:45PM Apr 18, 2024Observed: 3.86 ft at 6:00PM Apr 18, 2024Observed: 3.86 ft at 6:15PM Apr 18, 2024Observed: 3.85 ft at 6:30PM Apr 18, 2024Observed: 3.86 ft at 6:45PM Apr 18, 2024Observed: 3.86 ft at 7:00PM Apr 18, 2024Observed: 3.85 ft at 7:15PM Apr 18, 2024Observed: 3.86 ft at 7:30PM Apr 18, 2024Observed: 3.86 ft at 7:45PM Apr 18, 2024Observed: 3.85 ft at 8:00PM Apr 18, 2024Observed: 3.85 ft at 8:15PM Apr 18, 2024Observed: 3.85 ft at 8:30PM Apr 18, 2024Observed: 3.84 ft at 8:45PM Apr 18, 2024Observed: 3.84 ft at 9:00PM Apr 18, 2024Observed: 3.83 ft at 9:15PM Apr 18, 2024Observed: 3.84 ft at 9:30PM Apr 18, 2024Observed: 3.84 ft at 9:45PM Apr 18, 2024Observed: 3.84 ft at 10:00PM Apr 18, 2024Observed: 3.83 ft at 10:15PM Apr 18, 2024Observed: 3.82 ft at 10:30PM Apr 18, 2024Observed: 3.83 ft at 10:45PM Apr 18, 2024Observed: 3.83 ft at 11:00PM Apr 18, 2024Observed: 3.82 ft at 11:15PM Apr 18, 2024Observed: 3.82 ft at 11:30PM Apr 18, 2024Observed: 3.82 ft at 11:45PM Apr 18, 2024Observed: 3.82 ft at 12:00AM Apr 19, 2024Observed: 3.82 ft at 12:15AM Apr 19, 2024Observed: 3.83 ft at 12:30AM Apr 19, 2024Observed: 3.84 ft at 12:45AM Apr 19, 2024Observed: 3.83 ft at 1:00AM Apr 19, 2024Observed: 3.84 ft at 1:15AM Apr 19, 2024Observed: 3.83 ft at 1:30AM Apr 19, 2024Observed: 3.83 ft at 1:45AM Apr 19, 2024Observed: 3.83 ft at 2:00AM Apr 19, 2024Observed: 3.83 ft at 2:15AM Apr 19, 2024Observed: 3.84 ft at 2:30AM Apr 19, 2024Observed: 3.83 ft at 2:45AM Apr 19, 2024Observed: 3.84 ft at 3:00AM Apr 19, 2024Observed: 3.85 ft at 3:15AM Apr 19, 2024Observed: 3.85 ft at 3:30AM Apr 19, 2024Observed: 3.85 ft at 3:45AM Apr 19, 2024Observed: 3.86 ft at 4:00AM Apr 19, 2024Observed: 3.85 ft at 4:15AM Apr 19, 2024Observed: 3.86 ft at 4:30AM Apr 19, 2024Observed: 3.86 ft at 4:45AM Apr 19, 2024Observed: 3.86 ft at 5:00AM Apr 19, 2024Observed: 3.87 ft at 5:15AM Apr 19, 2024Observed: 3.86 ft at 5:30AM Apr 19, 2024Observed: 3.86 ft at 5:45AM Apr 19, 2024Observed: 3.87 ft at 6:00AM Apr 19, 2024Observed: 3.87 ft at 6:15AM Apr 19, 2024Observed: 3.86 ft at 6:30AM Apr 19, 2024Observed: 3.87 ft at 6:45AM Apr 19, 2024Observed: 3.86 ft at 7:00AM Apr 19, 2024Observed: 3.87 ft at 7:15AM Apr 19, 2024Observed: 3.87 ft at 7:30AM Apr 19, 2024Observed: 3.87 ft at 7:45AM Apr 19, 2024Observed: 3.86 ft at 8:00AM Apr 19, 2024Observed: 3.86 ft at 8:15AM Apr 19, 2024Observed: 3.87 ft at 8:30AM Apr 19, 2024Observed: 3.86 ft at 8:45AM Apr 19, 2024Observed: 3.87 ft at 9:00AM Apr 19, 2024Observed: 3.86 ft at 9:15AM Apr 19, 2024Forecast: 3.84 ft 12:00PM Apr 19, 2024Forecast: 3.8 ft 6:00PM Apr 19, 2024Forecast: 3.79 ft 12:00AM Apr 20, 2024Forecast: 3.85 ft 6:00AM Apr 20, 2024Forecast: 3.82 ft 12:00PM Apr 20, 2024Forecast: 3.8 ft 6:00PM Apr 20, 2024Forecast: 3.77 ft 12:00AM Apr 21, 2024Forecast: 3.86 ft 6:00AM Apr 21, 2024Forecast: 3.85 ft 12:00PM Apr 21, 2024Forecast: 3.84 ft 6:00PM Apr 21, 2024Forecast: 3.83 ft 12:00AM Apr 22, 2024Forecast: 3.9 ft 6:00AM Apr 22, 2024Forecast: 3.9 ft 12:00PM Apr 22, 2024Forecast: 3.9 ft 6:00PM Apr 22, 2024Forecast: 3.92 ft 12:00AM Apr 23, 2024Forecast: 3.93 ft 6:00AM Apr 23, 2024Forecast: 3.93 ft 12:00PM Apr 23, 2024Forecast: 3.92 ft 6:00PM Apr 23, 2024Forecast: 3.93 ft 12:00AM Apr 24, 2024Forecast: 3.94 ft 6:00AM Apr 24, 2024Forecast: 3.95 ft 12:00PM Apr 24, 2024Forecast: 3.96 ft 6:00PM Apr 24, 2024Forecast: 3.99 ft 12:00AM Apr 25, 2024Forecast: 4.01 ft 6:00AM Apr 25, 2024Forecast: 4.03 ft 12:00PM Apr 25, 2024Forecast: 4.05 ft 6:00PM Apr 25, 2024Forecast: 4.08 ft 12:00AM Apr 26, 2024Highest Forecast: 4.09 ft 6:00AM Apr 26, 2024USGS--Water Resources of the United StatesTOPI1(plotting HGIRG) Graph Created (10:33AM Apr 19, 2024)ObservedForecast (issued 9:26AM Apr 19)Latest observed value: 3.86 ft at 9:15 AM MDT 19-Apr-2024. Flood Stage is 4 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Stage may be affected by ice during winter months.

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) 3.11 ft on 05/08/2022
(2) 3.28 ft on 06/07/2021
(3) 3.44 ft on 05/03/2020
(4) 3.72 ft on 06/02/2019
(5) 4.92 ft on 03/23/2018
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 Lowland and crop field flooding possible from Pebble Creek to Inkom.
3.5 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
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:28 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities