Portneuf River Near Tyhee flow report
As of July 16, 2026, Portneuf River Near Tyhee is flowing at 326 cfs with a gage height of 3.36 ft, holding steady over the past 24 hours. Source: USGS gauge #13075910, refreshed throughout the day.
Historical Data
Portneuf River Near Tyhee at a glance
How Portneuf River Near Tyhee is running right now, where it sits on the map, and the key gauge stats.
Portneuf River Near Tyhee is flowing at 326 cfs, with the water sitting 3.36 ft at the gage. Flow has held roughly steady over the past 24 hours.
This is USGS gauge #13075910 in Idaho. Over the past 10 days the average has been 278 cfs, peaking at 326 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Idaho flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #13075910).
Percentiles are flow-duration values computed from this gauge’s observed daily record as archived by Snoflo. Return periods are Weibull plotting-position estimates from observed annual maxima, provided as general reference context only. Always verify against official USGS NWIS records. Part of Snoflo for Engineering.
Streamflow Forecast
Over the next 5 days, Portneuf River Nr Tyhee Id is expected to hold near today's 326 cfs, toward roughly 351 cfs by 2026-07-21 (likely range 235-525 cfs) -- about normal for the date.
Powered by PULSE — Snoflo’s forecast engine, trained on this gauge’s full record of storms, snowmelt, and dry spells.
| Date | Expected (p50) | Likely range (p25–p75) | vs normal | Projected stage |
|---|
How does this compare to past years?
Year-over-year overlay, annual peak discharge, the full distribution of daily flows on record, and the gauge's rating curve.
Weather Forecast
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
Portneuf River Near Tyhee
The river has several small tributaries and is not dammed. Seasonal trends show peak flow during spring snowmelt and lower flow during the summer and fall. The river has a unique hydrology due to its karst topography, which allows for water to quickly flow underground and reemerge downstream. Additionally, the river has historically been impacted by mining and agricultural activities, leading to pollution and sedimentation. Despite these challenges, the Portneuf River is a popular destination for fishing, kayaking, and other recreational activities.
Nearby streamflow levels
Cross-check Portneuf River Near Tyhee's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Portneuf River Nr Tyhee Id | 326 cfs |
| Portneuf River At Pocatello Id | 40 cfs |
| Spring Creek At Sheepskin Rd Nr Fort Hall Id | 257 cfs |
| Snake River Nr Blackfoot Id | 4,420 cfs |
| Blackfoot River Nr Blackfoot Id | 64 cfs |
| Blackfoot River Bypass Nr Blackfoot Id | 0 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Portneuf River Near Tyhee. Spring snowmelt is the dominant driver of streamflow in mountain basins -- a deep snowpack upstream means more runoff later in the season.
| SNOTEL station | Snowpack |
|---|---|
| Wildhorse Divide | 0 in |
| Wildhorse Divide | 0 in |
| American Falls 0.6 Se | 0 in |
| Nohrsc Pebble Creek Snotel | 0 in |
| Nohrsc Sedgwick Peak | 0 in |
| Sedgwick Peak | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Portneuf River Near Tyhee.
Boat launches
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River levels & flood safety
- Read the level before you go
- A river that's runnable at one flow can be deadly at another. Check current discharge and gage height — like the values shown above — against the flood-stage thresholds, and remember levels can spike fast after rain or a dam release.
- Respect cold water
- Snowmelt rivers run cold even in summer. Sudden immersion triggers cold-water shock and saps strength within minutes. Wear a PFD, dress for the water temperature (not the air), and never wade or paddle alone.
- Watch for swiftwater hazards
- Strainers (downed trees), undercut rocks, and low-head dams are the deadliest features on moving water. High, fast, muddy water hides them. If in doubt, scout from shore and portage.
- Mind flash floods & releases
- Narrow canyons can flood from a storm miles upstream, and dam-controlled reaches can rise without warning. Know the forecast, the release schedule, and your exit before you launch.
Track Portneuf River Near Tyhee in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Portneuf River Near Tyhee crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Portneuf River Near Tyhee
Where does the streamflow data for Portneuf River Near Tyhee come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 13075910. Snoflo refreshes the time series throughout the day. Forecasts come from the NOAA / yr.no feed Snoflo's iOS app uses.
How often is the report updated?
USGS gauges report continuously (typically every 15 minutes). Snoflo pulls fresh values throughout the day — look for the "as of" timestamp on the streamflow hero card.
What's the difference between discharge and gage height?
Discharge (cubic feet per second, or cfs) is the volume of water flowing past the gauge each second. Gage height is how high the water sits at the gauge (feet). They're related by a rating curve specific to each gauge — higher water means more flow, but the exact ratio depends on channel shape.
How is "percent of median" calculated?
Today's discharge is compared to the historical median discharge on this calendar day across the gauge's full record. 100% = right on median; 200% = a very high year; 30% = a drought-level low.
What are flood stages, and is this river safe right now?
Flood stages are NWS-defined gage-height thresholds — Action, Minor, Moderate, Major — marking when nearby roads or floodplains start to be affected. "Safe" depends on your activity and skill: a level that's a fun paddle for an expert can be lethal for a wader. Always check the current level against the thresholds above and the safety links, and when in doubt, stay off the water.
Can I get alerts when Portneuf River Near Tyhee rises?
Yes — flow alerts are managed in the Snoflo iOS app. Favorite this gauge, set a streamflow threshold (e.g. "alert me when discharge crosses 5,000 cfs"), and you'll get a push the moment USGS reports the crossing.
Access the free Portneuf River Near Tyhee report
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