Rivermatics

USGS Streamgage 13075910

Portneuf River near Tyhee, ID

Portneuf River near Tyhee, ID is USGS streamgage 13075910 in Idaho, monitoring river discharge in hydrologic subbasin 17040208. It sits on the Portneuf River, alongside 5 other gauges Rivermatics tracks on the same river. It drains a watershed of about 1,305 square miles. Discharge records at this site go back to 1985. Typical flow runs near 163.9 cfs in July and 577.1 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State
Idaho
Drainage area
1,305 sq mi
Subbasin (HUC-8)
17040208
Coordinates
42.94472, -112.54444
USGS site number
13075910
Records begin
1985-05-01 (41 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Portneuf River near Tyhee, ID. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
342 358 375
326 357 384
314 353 388
303 350 392
298 351 403
294 351 412
287 350 417
282 349 420
283 349 424
278 346 425
273 345 429
264 342 436
261 341 437
256 337 433

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 41 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 372.1 440.9 575.5
February 374.1 465.9 672.8
March 417 545.7 769.5
April 383.8 577.1 1,103.2
May 155.7 401.3 1,180.2
June 76.9 195.2 686.2
July 98.5 163.9 263.2
August 149 211.3 311.2
September 191.8 268.1 414.6
October 317 413.9 536.1
November 376.2 445.9 547.3
December 374.9 446.5 550

All values in cubic feet per second (cfs).

Common questions

When does Portneuf River near Tyhee, ID normally run highest?
April, on the long-term record. The median daily flow that month is about 577.1 cfs, against 163.9 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Portneuf River near Tyhee, ID?
It depends on the month. In January, half of days historically fall near 440.9 cfs, with the middle 80% of days between 372.1 and 575.5 cfs. The month-by-month table on this page gives the full range.
How long has Portneuf River near Tyhee, ID been measured?
Discharge records at USGS site 13075910 begin in 1985, about 41 years, covering roughly 9,193 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Portneuf River near Tyhee, ID?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Portneuf River near Tyhee, ID?
The gauge sits at 42.94472, -112.54444, in Idaho, in hydrologic subbasin 17040208, draining roughly 1,305 square miles.
Can I use Portneuf River near Tyhee, ID data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the Portneuf River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Portneuf River in full.

Other gauges in this subbasin